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  • Category: Shortwave
  • Founded: Sep 11, 2005
  • Language: English
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#32931 From: Jeff Blaine <keepwalking188@...>
Date: Sat May 2, 2009 7:28 pm
Subject: Softrock v9.0 w/BPF - Use as an RFI sniffer
keepwalking188
Send Email Send Email
 
Another use for the excellent softrock 9.0 BFP SDR. – it serves as an
exceptional RFI sniffer.

I did not think of this use initially but sort of stumbled onto it
today. Here’s the story… Hope it's of some use to others.

My daughter had a DVD player that created a ton of noise on 40m when it
was powered on. My s-meter would jump up on 20m a couple of s-units when
that thing was on so we were always at odds on its use. Today I thought
that I would take a look inside and see what’s up.

As it turns out the internal 5V switching PS was the source – no
surprise there…. But I got lucky in that the PS was a single-voltage
5V/1A module. Bypassing that module with an external 5V linear regulated
supply cleaned up the noise very nicely. Checked the baseline s-meter
noise level with the DVD player off – as measured by the rig’s s-meter.
Powered on the DVD player, and looked at the s-meter level which jumped
up a couple of s-units. After replacing the PS with the linear one, the
s-meter values power-on and power-off were unchanged. Mission accomplished.

With this success, I got to thinking about the rest of the house. Would
the SDR work for other potential noise sources in the house… The prior
way I had used to track down the RFI sources in the house is to run the
rig off a battery. Power off the house mains. Observe the rig s-meter
for a baseline v reading on each band. 80/40/20 seems enough. Then
repowering each breaker, one by one, and looking for significant moves
as observed on the s-meter to indicate the region in the house to give
attention to – then by process of elimination, finding the electrical
appliance responsible.

It works but the s-meter is a bit subjective. And unless you have a very
patient observer as a helper jumping band-to-band as you go along, it
involves quite a bit running back & forth from rig to room. In the past,
I had found several badly behaving gadgets with this method. But that
was a year ago. Time to take another look - but its a lot of work so
I've been delaying...

With the SDR sitting on the bench - it occurred to me I could simply put
a pigtail antenna on the SDR and take the entire setup of SDR/PC to each
room. Eliminates the legwork!

And the PowerSDR s-meter response is adjustable (peak, average, etc and
with adjustable hold times). It gives a direct numerical reading instead
of requiring meter interpretation.

Another handy feature of this method is that the type of noise can be
visually observed. Narrow band spurs are not much of a concern for me.
It’s the wider band “hash” type of noise that I am looking to kill off.
So I picked a 5khz BW in the CW part of 80/40/20 – observing the s-meter
level on each band.

So I lugged the laptop/sdr/pigtail antenna into each room. Repeated the
process in each room – positioning the antenna in the center of the
room. And then going to each outlet disconnecting/reconnecting each
electrical gadget.

The search yielded another noisy DVD player and two more switching PS.

73/jeff/ac0c

#32932 From: Sid Boyce <sboyce@...>
Date: Sat May 2, 2009 8:09 pm
Subject: Re: networking power line adapters
priddix
Send Email Send Email
 
Clive Lorton wrote:
>
>
>
> Sid Boyce wrote:
>> I shall do my bit, but you have to be cynical over here as what the
>> industry wants, the industry gets. So if there is a chance for the power
>> and associated companies to make money, we stand as much chance of
>> stopping it happening as saving a person from a falling building with
>> wet paper towels.
>> Shamocracy rules!
>> 73 ... Sid.
> There was another similar petition see for Number 10's responce.
> http://www.number10.gov.uk/Page19025.
> <http://www.number10.gov.uk/Page19025.>
>
> I'll make no comment on it. Just judge for your self.
>
> 73 Clive G8POC
>
Thanks for the pointer - I'm not aware of any manufacturer or importer
being subjected to the kind of EMC scrutiny as has long been established
by Deutche PTT e.g. As a matter of fact where UK entities asked for EMC
specs, we always supplied the document produced by Deutche PTT testers
who certified our products at source before they were allowed into Germany.
When I first started using a BBC Micro in its UK plastic livery for
RTTY, the noise generated was incredible and I had to had to coat the
inside of the case with aluminium foil and graphite to quieten it to a
reasonable level + some ferrites on cables.
My local supplier then opened up a BBC Micro built for the German
market, it was as if it was made to be bomb proof and many times heavier
than our specimens.
Even with PC's in metal cases, I found my Spectrum Analyser module is
useless for other than connecting directly to a TX output via a switched
attenuator box.
73 ... Sid.
--
Sid Boyce ... Hamradio License G3VBV, Licensed Private Pilot
Emeritus IBM/Amdahl Mainframes and Sun/Fujitsu Servers Tech Support
Specialist, Cricket Coach
Microsoft Windows Free Zone - Linux used for all Computing Tasks

#32933 From: "Paul Playford" <paul@...>
Date: Sat May 2, 2009 9:09 pm
Subject: Re: Softrock v9.0 w/BPF - Use as an RFI sniffer
w8aef
Send Email Send Email
 
Neat!

de Paul, W8AEF

ZF2JI/ZF2TA  FO8DX/FO8PLA  8Q7AA  XZ0A  VU7RG  TX5C


----- Original Message -----
From: "Jeff Blaine" <keepwalking188@...>

Subject: [softrock40] Softrock v9.0 w/BPF - Use as an RFI sniffer


> Another use for the excellent softrock 9.0 BFP SDR. – it serves as an
> exceptional RFI sniffer.
>

#32934 From: Tony Parks <kb9yig@...>
Date: Sun May 3, 2009 1:03 am
Subject: Re: Re: Built 40m v6.2 Lite receiver available
kb9yig
Send Email Send Email
 
Hi Gus,

I could build up a Lite II receiver board for you for 40m.  What center frequency would you like, 7.055 MHz or 7.014 MHz?

Thanks and 73,
Tony Parks
kb9yig@...


On Sat, 2009-05-02 at 13:18 +0000, lw3ewz wrote:


Hi tony
Do you have one for me...
Tell me and send to money via paypal
The cost is 20 Usd for dx?
tnx
lw3ewz
Gus Andrada

--- In softrock40@yahoogroups.com, "kb9yig" <kb9yig@...> wrote:
>
> Good Afternoon All,
>
> I have a built/tested 40m v6.2 Lite receiver that is extra to my needs. The receiver has a 40m center frequency of about 7.056 MHz and has cables attached to the board. Attached cables include a 3 foot long audio cable with a 1/8 stereo plug on one end for plugging into the line-in jack of a soundcard. Also attached to the board are DC power leads and a short length of RG 174 coax for the 50 ohm antenna connection.
>
> If anyone would like to have the built 40m SDR receiver, I would ask for $20 which would cover the cost of the unit and postage. I would be willing to include with the receiver a second crystal to give a center frequency of about 7.014 MHz.
>
> Thanks and 73,
>
> Tony KB9YIG
>





#32935 From: "lw3ewz" <lw3ewz@...>
Date: Sun May 3, 2009 2:38 am
Subject: Re: Built 40m v6.2 Lite receiver available
lw3ewz
Send Email Send Email
 
hi Tony
7055 is good for me
Im aprecdiated your work and effort
tell me the cost
best regards
Gus andrada
lw3ewz

--- In softrock40@yahoogroups.com, Tony Parks <kb9yig@...> wrote:
>
> Hi Gus,
>
> I could build up a Lite II receiver board for you for 40m.  What center
> frequency would you like, 7.055 MHz or 7.014 MHz?
>
> Thanks and 73,
> Tony Parks
> kb9yig@...
>
>
> On Sat, 2009-05-02 at 13:18 +0000, lw3ewz wrote:
> >
> >
> > Hi tony
> > Do you have one for me...
> > Tell me and send to money via paypal
> > The cost is 20 Usd for dx?
> > tnx
> > lw3ewz
> > Gus Andrada
> >
> > --- In softrock40@yahoogroups.com, "kb9yig" <kb9yig@> wrote:
> > >
> > > Good Afternoon All,
> > >
> > > I have a built/tested 40m v6.2 Lite receiver that is extra to my
> > needs. The receiver has a 40m center frequency of about 7.056 MHz and
> > has cables attached to the board. Attached cables include a 3 foot
> > long audio cable with a 1/8 stereo plug on one end for plugging into
> > the line-in jack of a soundcard. Also attached to the board are DC
> > power leads and a short length of RG 174 coax for the 50 ohm antenna
> > connection.
> > >
> > > If anyone would like to have the built 40m SDR receiver, I would ask
> > for $20 which would cover the cost of the unit and postage. I would be
> > willing to include with the receiver a second crystal to give a center
> > frequency of about 7.014 MHz.
> > >
> > > Thanks and 73,
> > >
> > > Tony KB9YIG
> > >
> >
> >
> >
> >
> >
>

#32936 From: "Ray" <N0FY@...>
Date: Sun May 3, 2009 4:19 am
Subject: Network power line adapters
ray_costello
Send Email Send Email
 


1b. Re: networking power line adapters

Posted by: "Alan" alan4alan@... alanzfq

Date: Fri May 1, 2009 11:27 am ((PDT))

 

----- Original Message -----

From: "Lawrence Galea"

Subject: [softrock40] networking power line adapters

 

 

>I've just found this on the RSGB news website re home networking power line

>adapters and the interference

they cause. A pressure group UKQRM has been set up and they have a petition

on

line at http://petitions.number10.gov.uk/SaveShortwave2/

Thanks Lawrence,

The most important thing for any British station, Amateur or SWL, is to make

their complaint known to Ofcom.

Below, a copy from a UK amateur on the subject

73 Alan G4ZFQ

The Ofcom telephone helpline doesnt always acheive any result,

the paperwork seems to get "lost" in the system.

Better to use the online complaint form.

The additional information section allows quite a lot of

information to be added so our PLT complaints can be

accomodated OK.

The online complaint results in a telephone reply the

same or next working day by someone who will have

dealt with quite a number of similar complaints.

Best to have a recording made just in case the QRM

should go off just before Ofcom investigator visits!

Have had 4 PLTs removed,one replaced by WiFi the

others by direct wiring which gives a superior connection

as well as saving power,about 5 watts per PLT unit.

A fifth unit went out of use by itself,reason unknown.

73 Paul G0HNW

 

Reply from N0FY

My friends and fellow hams - this issue has been on the ARRL agenda for several years now and unfortunately still is.  The ARRL has had a special fund to fight the BPL (Broadband over the POWER LINES.  It seems that no one really cares about this issue and I can tell you first hand that it will limit your communications ability.

In the US it seems that that big business can turn the FCC any way it wants.  The only only hope is that we as group support this effort and the ARRL (legal fees are high).

My greatest fear is that amateur community will wake up in a few years when the prop cycles improves and all we can we hear is S9 BPL signals.  I am saddened in the knowleadge that very few hams state-side even seem to know that BPL is around.

Also sorry to hear that this issue has grown in scope to the UK and other countries. 

My personal opinion is that the internet is trash and does more harm than good in our societies.  I have used the Internet for many years and have seen a steady deteriations of ethics and a take-over by business.  It is impossible to to do a search these days without hitting business advertising.

Sorry if this offends anyone but you don't have to try hard to find decadence and harmful information on the internet. 

73, Ray, N0FY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Messages in this topic (5)

________________________________________________________________________

1c. Re: networking power line adapters

Posted by: "Lawrence Galea" galea_lawrence@... galea_lawrence

Date: Fri May 1, 2009 11:37 pm ((PDT))

02.05.2009

Alan,

I read it on the RSGB news and it is important that everyone responds to put pressure on the authorities, other wise they will not take any action.

A couple of years ago we saved the 10GHz band in Malta from interference because they were going to allocate TV studio - TX site and OB units to Studio links on it, but we got together and they allocated them above 10.5GHz.

In the case of Malta it was the 10GHz band, but in the case of the network power line adapters the interference will cause disruption of communications on all the HF bands and beyond. So it is very important for every G station to go and to the website and complain to OFCOM.

Thanks & regards,

Lawrence

9H1AV, 9H9MHR

--- Ven 1/5/09, Alan <alan4alan@...> ha scritto:

Da: Alan <alan4alan@...>

Oggetto: Re: [softrock40] networking power line adapters

A: softrock40@yahoogroups.com

Data: Venerdì 1 maggio 2009, 20:26


#32937 From: Tony Parks <kb9yig@...>
Date: Sun May 3, 2009 7:29 am
Subject: Re: Re: Built 40m v6.2 Lite receiver available
kb9yig
Send Email Send Email
 
Hi Gus,

PayPal $20 to kb9yig@... to get a built/tested 40m Lite II mailed within a few days.  The $20 will include the DX postage.

Thanks and 73,
Tony Parks
kb9yig@...


On Sun, 2009-05-03 at 02:38 +0000, lw3ewz wrote:



hi Tony
7055 is good for me
Im aprecdiated your work and effort
tell me the cost
best regards
Gus andrada
lw3ewz

--- In softrock40@yahoogroups.com, Tony Parks <kb9yig@...> wrote:
>
> Hi Gus,
>
> I could build up a Lite II receiver board for you for 40m. What center
> frequency would you like, 7.055 MHz or 7.014 MHz?
>
> Thanks and 73,
> Tony Parks
> kb9yig@...
>
>
> On Sat, 2009-05-02 at 13:18 +0000, lw3ewz wrote:
> >
> >
> > Hi tony
> > Do you have one for me...
> > Tell me and send to money via paypal
> > The cost is 20 Usd for dx?
> > tnx
> > lw3ewz
> > Gus Andrada
> >
> > --- In softrock40@yahoogroups.com, "kb9yig" <kb9yig@> wrote:
> > >
> > > Good Afternoon All,
> > >
> > > I have a built/tested 40m v6.2 Lite receiver that is extra to my
> > needs. The receiver has a 40m center frequency of about 7.056 MHz and
> > has cables attached to the board. Attached cables include a 3 foot
> > long audio cable with a 1/8 stereo plug on one end for plugging into
> > the line-in jack of a soundcard. Also attached to the board are DC
> > power leads and a short length of RG 174 coax for the 50 ohm antenna
> > connection.
> > >
> > > If anyone would like to have the built 40m SDR receiver, I would ask
> > for $20 which would cover the cost of the unit and postage. I would be
> > willing to include with the receiver a second crystal to give a center
> > frequency of about 7.014 MHz.
> > >
> > > Thanks and 73,
> > >
> > > Tony KB9YIG
> > >
> >
> >
> >
> >
> >
>





#32938 From: "J.Melis" <jan.melis@...>
Date: Sun May 3, 2009 9:26 am
Subject: No Mail
jan.melis
Send Email Send Email
 
Dear Tony, As I shall be absent a lot during the summer will you please put me on NO MAIL to prevent my mailbox from overflowing. I shall email you when I return. Regards Jan 

#32939 From: Dave Ackrill <dave.g0dja@...>
Date: Sun May 3, 2009 9:48 am
Subject: Re: No Mail
g0dja
Send Email Send Email
 
J.Melis wrote:
> Dear Tony, As I shall be absent a lot during the summer will you please put me
on NO MAIL

Dear Jan,

You are able to do this yourself by logging into your Yahoo Group, going
to 'Manage My Groups' and then setting the message delivery option to
be no mail.  When you get back, just log back in to 'Manage My Groups'
and turn the mail back on again.

You will be able to do this for all Yahoo Groups that you are a member
of and there is an option to set all of the groups on a screen to the
same option, which saves clicking through all of them.

Hope this helps.

Regards - Dave (G0DJA)

#32940 From: "patbilldavis" <CQbilld@...>
Date: Sun May 3, 2009 3:10 pm
Subject: A little help from my friends?
patbilldavis
Send Email Send Email
 
I have been asked to do a Softrock talk again at Central States VHF
Conference in Chicago at the end of July. I have done a number of
these in the past. I have always built Tony's latest and greatest,
applied it to my VHF/UHF station and reported on the results. A
result is a shack full of SoftRocks.

   What "I need from my friends", is your results using Softrocks with
analog receivers watching the receiver IF freq. What analog rig?
What IF freq? What Softrock? Buffer amp used? etc

   In the end, I would like to be able to have several examples of the
Softrocks being used as a panadaptor with analog radios. This is the
easiest way to to integrate a SDR into many VHF/UHF stations.

   You may email me off site (directly) or share. In the end I will
want to contact some of you with requests for photos (screen shots)
etc to be included in the presentation.

   I am using 10m Ver6.2, V6.3, and Ver7 Softrocks with the 28/144 Mhz
IF gear, but nothing with the analog radios IF freq here since my
Collins 75A4 and a WW2 surplus 455kc panadaptor back in the 1960s.


   THANK YOU .. Bill K0AWU EN37ed

#32941 From: "andrew.nilsson" <andrew.nilsson@...>
Date: Sun May 3, 2009 3:22 pm
Subject: Re: Linux Programs for RXTX v6.3
andrew.nilsson
Send Email Send Email
 
--- In softrock40@yahoogroups.com, Sid Boyce <sboyce@...> wrote:
> Linrad seem the closest thing, but setting it up is the problem. I tried
> it yesterday, but I think the problem is the inability to tune the Si570
> via e.g, the UBW.

I might be able to help here. I'm looking at setting up a netbook with dttsp and
encountering the same issues with the software. I've previously written code for
Mac OS X to interface with Tony's I2C board and I'll look at porting this in a
command line utility form to linux.

As for GUIs and tying things together - that's a far longer term project but one
which I've got some thoughts on. Too many projects, so little time!

Dttsp is being developed for performance, one of the recent versions uses only
12-13% cpu on my MSI Wind (Atom N270) so the potential for a portable setup
exists. The key issue seems to be the GUI performance, especially with these
netbooks.

Andrew vk6jbl

#32942 From: "lw3ewz" <lw3ewz@...>
Date: Sun May 3, 2009 5:24 pm
Subject: Re: Built 40m v6.2 Lite receiver available
lw3ewz
Send Email Send Email
 
hi tony
i have sen pay via paypal
please confirm the recive your pay
thanks very much
73´s
lw3ewz
Gus Andrada
--- In softrock40@yahoogroups.com, Tony Parks <kb9yig@...> wrote:
>
> Hi Gus,
>
> PayPal $20 to kb9yig@... to get a built/tested 40m Lite II mailed
> within a few days.  The $20 will include the DX postage.
>
> Thanks and 73,
> Tony Parks
> kb9yig@...
>
>
> On Sun, 2009-05-03 at 02:38 +0000, lw3ewz wrote:
> >
> >
> >
> > hi Tony
> > 7055 is good for me
> > Im aprecdiated your work and effort
> > tell me the cost
> > best regards
> > Gus andrada
> > lw3ewz
> >
> > --- In softrock40@yahoogroups.com, Tony Parks <kb9yig@> wrote:
> > >
> > > Hi Gus,
> > >
> > > I could build up a Lite II receiver board for you for 40m. What
> > center
> > > frequency would you like, 7.055 MHz or 7.014 MHz?
> > >
> > > Thanks and 73,
> > > Tony Parks
> > > kb9yig@
> > >
> > >
> > > On Sat, 2009-05-02 at 13:18 +0000, lw3ewz wrote:
> > > >
> > > >
> > > > Hi tony
> > > > Do you have one for me...
> > > > Tell me and send to money via paypal
> > > > The cost is 20 Usd for dx?
> > > > tnx
> > > > lw3ewz
> > > > Gus Andrada
> > > >
> > > > --- In softrock40@yahoogroups.com, "kb9yig" <kb9yig@> wrote:
> > > > >
> > > > > Good Afternoon All,
> > > > >
> > > > > I have a built/tested 40m v6.2 Lite receiver that is extra to my
> > > > needs. The receiver has a 40m center frequency of about 7.056 MHz
> > and
> > > > has cables attached to the board. Attached cables include a 3 foot
> > > > long audio cable with a 1/8 stereo plug on one end for plugging
> > into
> > > > the line-in jack of a soundcard. Also attached to the board are DC
> > > > power leads and a short length of RG 174 coax for the 50 ohm
> > antenna
> > > > connection.
> > > > >
> > > > > If anyone would like to have the built 40m SDR receiver, I would
> > ask
> > > > for $20 which would cover the cost of the unit and postage. I
> > would be
> > > > willing to include with the receiver a second crystal to give a
> > center
> > > > frequency of about 7.014 MHz.
> > > > >
> > > > > Thanks and 73,
> > > > >
> > > > > Tony KB9YIG
> > > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > >
> >
> >
> >
> >
> >
>

#32943 From: "lw3ewz" <lw3ewz@...>
Date: Sun May 3, 2009 5:24 pm
Subject: Re: Built 40m v6.2 Lite receiver available
lw3ewz
Send Email Send Email
 
hi tony
i have sen pay via paypal
please confirm the recive your pay
thanks very much
73´s
lw3ewz
Gus Andrada
--- In softrock40@yahoogroups.com, Tony Parks <kb9yig@...> wrote:
>
> Hi Gus,
>
> PayPal $20 to kb9yig@... to get a built/tested 40m Lite II mailed
> within a few days.  The $20 will include the DX postage.
>
> Thanks and 73,
> Tony Parks
> kb9yig@...
>
>
> On Sun, 2009-05-03 at 02:38 +0000, lw3ewz wrote:
> >
> >
> >
> > hi Tony
> > 7055 is good for me
> > Im aprecdiated your work and effort
> > tell me the cost
> > best regards
> > Gus andrada
> > lw3ewz
> >
> > --- In softrock40@yahoogroups.com, Tony Parks <kb9yig@> wrote:
> > >
> > > Hi Gus,
> > >
> > > I could build up a Lite II receiver board for you for 40m. What
> > center
> > > frequency would you like, 7.055 MHz or 7.014 MHz?
> > >
> > > Thanks and 73,
> > > Tony Parks
> > > kb9yig@
> > >
> > >
> > > On Sat, 2009-05-02 at 13:18 +0000, lw3ewz wrote:
> > > >
> > > >
> > > > Hi tony
> > > > Do you have one for me...
> > > > Tell me and send to money via paypal
> > > > The cost is 20 Usd for dx?
> > > > tnx
> > > > lw3ewz
> > > > Gus Andrada
> > > >
> > > > --- In softrock40@yahoogroups.com, "kb9yig" <kb9yig@> wrote:
> > > > >
> > > > > Good Afternoon All,
> > > > >
> > > > > I have a built/tested 40m v6.2 Lite receiver that is extra to my
> > > > needs. The receiver has a 40m center frequency of about 7.056 MHz
> > and
> > > > has cables attached to the board. Attached cables include a 3 foot
> > > > long audio cable with a 1/8 stereo plug on one end for plugging
> > into
> > > > the line-in jack of a soundcard. Also attached to the board are DC
> > > > power leads and a short length of RG 174 coax for the 50 ohm
> > antenna
> > > > connection.
> > > > >
> > > > > If anyone would like to have the built 40m SDR receiver, I would
> > ask
> > > > for $20 which would cover the cost of the unit and postage. I
> > would be
> > > > willing to include with the receiver a second crystal to give a
> > center
> > > > frequency of about 7.014 MHz.
> > > > >
> > > > > Thanks and 73,
> > > > >
> > > > > Tony KB9YIG
> > > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > >
> >
> >
> >
> >
> >
>

#32944 From: "rodbrink15" <kq6f@...>
Date: Sun May 3, 2009 5:48 pm
Subject: RXTXv6.2 15m/17m kit
rodbrink15
Send Email Send Email
 
In looking at the schematic for this kit, I'm puzzled by the N2PK daughter
board.  It shows two crystals - 28.06 mHz and 28.224 mHz.  The implication is
that the circuit is tuned to an overtone and the resulting output then gets
divided either by 4 or 8 to get down to the required LO frequency.  But I can't
come up with any multiple of these two crystal freqs that when divided gets me
into either the 15m or 17m band.  Can someone help me out here?

Rod, KQ6F

#32945 From: Dave - WB6DHW <brainerd@...>
Date: Sun May 3, 2009 6:15 pm
Subject: Re: RXTXv6.2 15m/17m kit
brainerdd
Send Email Send Email
 
rodbrink15 wrote:
> In looking at the schematic for this kit, I'm puzzled by the N2PK daughter
board.  It shows two crystals - 28.06 mHz and 28.224 mHz.  The implication is
that the circuit is tuned to an overtone and the resulting output then gets
divided either by 4 or 8 to get down to the required LO frequency.  But I can't
come up with any multiple of these two crystal freqs that when divided gets me
into either the 15m or 17m band.  Can someone help me out here?
>
> Rod, KQ6F
>
>
>
Rod:
    The QSD in the Softrock responds to the 3rd harmonic of the LO.
28.06/4*3 = 21.045
    That's also why you need a bpf to filter out the 7 MHz fundamental.

Dave - WB6DHW
<http://wb6dhw.com>

#32946 From: Tony Parks <kb9yig@...>
Date: Sun May 3, 2009 7:21 pm
Subject: Re: Re: Built 40m v6.2 Lite receiver available
kb9yig
Send Email Send Email
 
Hi Gus,

Thanks for the PayPal order for a built 40m Lite II receiver.  As I type this note your 40m Lite II is playing on my other PC.  I will let the receiver run until tomorrow afternoon and it all look good then I will mail it to you later tomorrow.

Please see the attached schematic for the 40m Lite II and I would recommend that you download Rocky 3.6 to use with the little receiver.

Rocky Software
< http://www.dxatlas.com/rocky/ >


Thanks and 73,
Tony Parks
kb9yig@...


On Sun, 2009-05-03 at 17:24 +0000, lw3ewz wrote:


hi tony
i have sen pay via paypal
please confirm the recive your pay
thanks very much
73´s
lw3ewz
Gus Andrada
--- In softrock40@yahoogroups.com, Tony Parks <kb9yig@...> wrote:
>
> Hi Gus,
>
> PayPal $20 to kb9yig@... to get a built/tested 40m Lite II mailed
> within a few days. The $20 will include the DX postage.
>
> Thanks and 73,
> Tony Parks
> kb9yig@...
>
>
> On Sun, 2009-05-03 at 02:38 +0000, lw3ewz wrote:
> >
> >
> >
> > hi Tony
> > 7055 is good for me
> > Im aprecdiated your work and effort
> > tell me the cost
> > best regards
> > Gus andrada
> > lw3ewz
> >
> > --- In softrock40@yahoogroups.com, Tony Parks <kb9yig@> wrote:
> > >
> > > Hi Gus,
> > >
> > > I could build up a Lite II receiver board for you for 40m. What
> > center
> > > frequency would you like, 7.055 MHz or 7.014 MHz?
> > >
> > > Thanks and 73,
> > > Tony Parks
> > > kb9yig@
> > >
> > >
> > > On Sat, 2009-05-02 at 13:18 +0000, lw3ewz wrote:
> > > >
> > > >
> > > > Hi tony
> > > > Do you have one for me...
> > > > Tell me and send to money via paypal
> > > > The cost is 20 Usd for dx?
> > > > tnx
> > > > lw3ewz
> > > > Gus Andrada
> > > >
> > > > --- In softrock40@yahoogroups.com, "kb9yig" <kb9yig@> wrote:
> > > > >
> > > > > Good Afternoon All,
> > > > >
> > > > > I have a built/tested 40m v6.2 Lite receiver that is extra to my
> > > > needs. The receiver has a 40m center frequency of about 7.056 MHz
> > and
> > > > has cables attached to the board. Attached cables include a 3 foot
> > > > long audio cable with a 1/8 stereo plug on one end for plugging
> > into
> > > > the line-in jack of a soundcard. Also attached to the board are DC
> > > > power leads and a short length of RG 174 coax for the 50 ohm
> > antenna
> > > > connection.
> > > > >
> > > > > If anyone would like to have the built 40m SDR receiver, I would
> > ask
> > > > for $20 which would cover the cost of the unit and postage. I
> > would be
> > > > willing to include with the receiver a second crystal to give a
> > center
> > > > frequency of about 7.014 MHz.
> > > > >
> > > > > Thanks and 73,
> > > > >
> > > > > Tony KB9YIG
> > > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > >
> >
> >
> >
> >
> >
>





#32947 From: "Randall family" <brandall@...>
Date: Sun May 3, 2009 9:49 pm
Subject: Re: A little help from my friends? To K0AWU
wd4jqv
Send Email Send Email
 
Hello Bill,
I used a Softrock Lite V6.2 with Elecraft K2 IF.  This was used with 2 meter through 1296MHz converters
Modified 40 meter V6.2 model as follows:
    C3 = 120pF
    C4 = 100pF
    C21 = 200pF
    C22 = 3000pF
    JP1 = set for divide by 4
    L1 = stock 40 meter coil.  C21 change makes OK at 4.915 MHz
    T1 = stock 40 meter xfmr.  C22 change makes OK at 4.915 MHz
    X1 = Digikey X984-ND  19.6608 MHz 20 pF crystal.
   L99 = added inductor T25-6 core.   Between 10 and 15 turns of magnet wire as needed. 
 
This crystal caused a weak signal in passband, so I added small L in series with X1 to move frequency down.  Use just enough turns so that you don't here xtal/4 in IF.
 
To tap off signal I used a 220 ohm resistor in series at the input to the noise blanker module.  This resistor fed a 1:1 isolation transformer which fed an MAR3 MMIC.  The MAR3 drives the Softrock board.  I mounted softrock board inside K2 and put 2 RCA jacks on rear panel for IQ "audio" signals.
 
I used an old Dell 500MHz laptop with it's internal sound board, Win98, and WinRad version for Win98.  This worked well although my image rejection in the softtrock was only 15dB or so.  This is good enough to find signals as panadaptor.  The 500MHz computer is not quite fast enough and leaves holes in softrock audio.  It is still a very useful panadaptor!  I can detect beacon signals that I can't hear in K2.  This was easy to setup and just works when you start it up.
 
I later changed to a 2.2GHz win XP machine with Creative Audigy SE sound board.  This allows 96 kHz sample rate instead of 48kHz.  Unfortunately every time I get it working XP kills sound card settings on power down and up & I start alll over again.  Demodulated softrock audio is very good; when it works! 
 
I am one of the stone age people who would like to stay with Win 98, but the modern world won't let me!!!
 
73's & good luck on presentation
Bruce Randall WD4JQV  EM94LV
----- Original Message -----
Sent: Sunday, May 03, 2009 11:10 AM
Subject: [softrock40] A little help from my friends?

I have been asked to do a Softrock talk again at Central States VHF
Conference in Chicago at the end of July. I have done a number of
these in the past. I have always built Tony's latest and greatest,
applied it to my VHF/UHF station and reported on the results. A
result is a shack full of SoftRocks.

What "I need from my friends", is your results using Softrocks with
analog receivers watching the receiver IF freq. What analog rig?
What IF freq? What Softrock? Buffer amp used? etc

In the end, I would like to be able to have several examples of the
Softrocks being used as a panadaptor with analog radios. This is the
easiest way to to integrate a SDR into many VHF/UHF stations.

You may email me off site (directly) or share. In the end I will
want to contact some of you with requests for photos (screen shots)
etc to be included in the presentation.

I am using 10m Ver6.2, V6.3, and Ver7 Softrocks with the 28/144 Mhz
IF gear, but nothing with the analog radios IF freq here since my
Collins 75A4 and a WW2 surplus 455kc panadaptor back in the 1960s.

THANK YOU .. Bill K0AWU EN37ed



No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 8.0.238 / Virus Database: 270.12.15/2093 - Release Date: 05/02/09 14:23:00

#32948 From: "Randall family" <brandall@...>
Date: Sun May 3, 2009 9:51 pm
Subject: Re: A little help from my friends? To K0AWU
wd4jqv
Send Email Send Email
 
oops.  Added note K2 IF is 4.915MHz.
WD4JQV
----- Original Message -----
Sent: Sunday, May 03, 2009 5:49 PM
Subject: Re: [softrock40] A little help from my friends? To K0AWU

Hello Bill,
I used a Softrock Lite V6.2 with Elecraft K2 IF.  This was used with 2 meter through 1296MHz converters
Modified 40 meter V6.2 model as follows:
    C3 = 120pF
    C4 = 100pF
    C21 = 200pF
    C22 = 3000pF
    JP1 = set for divide by 4
    L1 = stock 40 meter coil.  C21 change makes OK at 4.915 MHz
    T1 = stock 40 meter xfmr.  C22 change makes OK at 4.915 MHz
    X1 = Digikey X984-ND  19.6608 MHz 20 pF crystal.
   L99 = added inductor T25-6 core.   Between 10 and 15 turns of magnet wire as needed. 
 
This crystal caused a weak signal in passband, so I added small L in series with X1 to move frequency down.  Use just enough turns so that you don't here xtal/4 in IF.
 
To tap off signal I used a 220 ohm resistor in series at the input to the noise blanker module.  This resistor fed a 1:1 isolation transformer which fed an MAR3 MMIC.  The MAR3 drives the Softrock board.  I mounted softrock board inside K2 and put 2 RCA jacks on rear panel for IQ "audio" signals.
 
I used an old Dell 500MHz laptop with it's internal sound board, Win98, and WinRad version for Win98.  This worked well although my image rejection in the softtrock was only 15dB or so.  This is good enough to find signals as panadaptor.  The 500MHz computer is not quite fast enough and leaves holes in softrock audio.  It is still a very useful panadaptor!  I can detect beacon signals that I can't hear in K2.  This was easy to setup and just works when you start it up.
 
I later changed to a 2.2GHz win XP machine with Creative Audigy SE sound board.  This allows 96 kHz sample rate instead of 48kHz.  Unfortunately every time I get it working XP kills sound card settings on power down and up & I start alll over again.  Demodulated softrock audio is very good; when it works! 
 
I am one of the stone age people who would like to stay with Win 98, but the modern world won't let me!!!
 
73's & good luck on presentation
Bruce Randall WD4JQV  EM94LV
----- Original Message -----
Sent: Sunday, May 03, 2009 11:10 AM
Subject: [softrock40] A little help from my friends?

I have been asked to do a Softrock talk again at Central States VHF
Conference in Chicago at the end of July. I have done a number of
these in the past. I have always built Tony's latest and greatest,
applied it to my VHF/UHF station and reported on the results. A
result is a shack full of SoftRocks.

What "I need from my friends", is your results using Softrocks with
analog receivers watching the receiver IF freq. What analog rig?
What IF freq? What Softrock? Buffer amp used? etc

In the end, I would like to be able to have several examples of the
Softrocks being used as a panadaptor with analog radios. This is the
easiest way to to integrate a SDR into many VHF/UHF stations.

You may email me off site (directly) or share. In the end I will
want to contact some of you with requests for photos (screen shots)
etc to be included in the presentation.

I am using 10m Ver6.2, V6.3, and Ver7 Softrocks with the 28/144 Mhz
IF gear, but nothing with the analog radios IF freq here since my
Collins 75A4 and a WW2 surplus 455kc panadaptor back in the 1960s.

THANK YOU .. Bill K0AWU EN37ed



No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 8.0.238 / Virus Database: 270.12.15/2093 - Release Date: 05/02/09 14:23:00



No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 8.0.238 / Virus Database: 270.12.15/2093 - Release Date: 05/02/09 14:23:00

#32949 From: Bill Davis Jr <CQbilld@...>
Date: Sun May 3, 2009 10:24 pm
Subject: RE: A little help from my friends? To K0AWU
patbilldavis
Send Email Send Email
 
THANK YOU Bruce for your email and great details! Do you use Rocky or PowerSDR or Winrad? Any chance you could send me a screen shot or two when in use at VHF/UHF?

Good DX .. 6m open here today,

73  Bill  K0AWU  EN37ed


To: softrock40@yahoogroups.com
From: brandall@...
Date: Sun, 3 May 2009 17:51:29 -0400

----- Original Message -----
Sent: Sunday, May 03, 2009 5:49 PM
Subject: Re: [softrock40] A little help from my friends? To K0AWU


Hello Bill,

--- K2 IF is 4.915MHz. ---

I used a Softrock Lite V6.2 with Elecraft K2 IF.  This was used with 2 meter through 1296MHz converters
Modified 40 meter V6.2 model as follows:
    C3 = 120pF
    C4 = 100pF
    C21 = 200pF
    C22 = 3000pF
    JP1 = set for divide by 4
    L1 = stock 40 meter coil.  C21 change makes OK at 4.915 MHz
    T1 = stock 40 meter xfmr.  C22 change makes OK at 4.915 MHz
    X1 = Digikey X984-ND  19.6608 MHz 20 pF crystal.
   L99 = added inductor T25-6 core.   Between 10 and 15 turns of magnet wire as needed. 
 
This crystal caused a weak signal in passband, so I added small L in series with X1 to move frequency down.  Use just enough turns so that you don't here xtal/4 in IF.
 
To tap off signal I used a 220 ohm resistor in series at the input to the noise blanker module.  This resistor fed a 1:1 isolation transformer which fed an MAR3 MMIC.  The MAR3 drives the Softrock board.  I mounted softrock board inside K2 and put 2 RCA jacks on rear panel for IQ "audio" signals.
 
I used an old Dell 500MHz laptop with it's internal sound board, Win98, and WinRad version for Win98.  This worked well although my image rejection in the softtrock was only 15dB or so.  This is good enough to find signals as panadaptor.  The 500MHz computer is not quite fast enough and leaves holes in softrock audio.  It is still a very useful panadaptor!  I can detect beacon signals that I can't hear in K2.  This was easy to setup and just works when you start it up.
 
I later changed to a 2.2GHz win XP machine with Creative Audigy SE sound board.  This allows 96 kHz sample rate instead of 48kHz.  Unfortunately every time I get it working XP kills sound card settings on power down and up & I start alll over again.  Demodulated softrock audio is very good; when it works! 
 
I am one of the stone age people who would like to stay with Win 98, but the modern world won't let me!!!
 
73's & good luck on presentation
Bruce Randall WD4JQV  EM94LV

Recent Activity
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#32950 From: "Paul Radge" <pradge@...>
Date: Sun May 3, 2009 11:04 pm
Subject: Re: rxtx v6.1 80/40
paulradge
Send Email Send Email
 
crickey ...must be the header v6.1 that makes my posts invisible to the world,,,
 
----- Original Message -----
From: Paul Radge
Sent: Sunday, May 03, 2009 12:41 AM
Subject: Re: [softrock40] rxtx v6.1 80/40

an amendment to this post of mine,,
 
i've adjusted the D44 consol panel and now have my 2.5w output there to using PSDRsr40 and a friend of mine can here it several kilometres away at s7 so i'm happy about that.
 
i still can not pass any audio through the system,,,,i have a heil mic connected to the D44 breakout board input which works on my SDR1000 ok but no audio passing through the PSDRsr40.On receive i'm picking up the audio from the speaker output of the breakout board and the pdf set up file for PSDRsr40 suggests i should use the head phones out from the softrock but there's no audio there.
 When i use Rocky audio does come from there though and not the breakout board.
 
another question ,,,
     when i press mox the RTS line does not go high,,,,??,,when i change software to WSJT and press tx RTS does go high so i'm a little lost why PSDR sr40 will not find the com port,,,from using WSJT i know it's com port 1 and i do have that configuration within set up of PSDRsr40 tab ,,,,
 
i also need to know how to do a rx image rejection on the PSDRsr40 as listening tonight on 40m i can see i have a image problem also,,,
 
hoping someone else has already been through this and can help me with these final hurdles
regards
Paul
vk3ddu
 
 
----- Original Message -----
From: Paul Radge
Sent: Saturday, May 02, 2009 5:52 PM
Subject: [softrock40] rxtx v6.1 80/40

Hi all,
          I've recently pulled my v6.1 rxtx back out of the draw for another attempt to get it working,This time i'm using a D44 sound card with Tony's breakout card.The kit is still in test mode ie stting on the bench with cables and wires running here n there ,,i've not connected any audio transformers or 1:1 transformers on the antenna as yet.
 
With Rocky 3.6
It recieves very well and when i put the kit into psk31 mode and with tx activated i can measure over 2 watts on the output so the D44 is a major improvement of where i was at a couple of years ago.
 
The transmitted signal is not on the rx frequency though and is at the LO ,,7.056 on 40m.Wonder if anyone has any helpfull comment son that ????
 
Using SDR v1.9.0 sr40
 Receive is ok ,,only ok as there's another image ie when listenning to a station on 40m i can see an image on the panadapter of the station i'm listenning to,,,when i move to that image it sounds like the upper sideband.
 
When i press tune button i can measure only 1/2 watt on my meter but it is on the frequency i'm listenning to when monitored on a second radio,,,,tune power is set to 100 and drive is set to 100.When i try SSB i can hear my own whistle on the second receiver but thats all.
I have VAC4.09 and com0com so later int he weekend i will a 3rd party digital program,
 
I seem to be stuck as Rocky will give me full power but only on the LO and SDRsr40 will give me very little power at the right frequency.I'd like to think that i've got software issues to resolve and not hardware with the V6.1 rxtx.
 
Any advice more than welcome,,,my CW ears fell off sometime ago so my main goal at the moment is to use the kit on SSB or psk.
 
regards
Paul
vk3ddu
 
 


#32951 From: Sid Boyce <sboyce@...>
Date: Mon May 4, 2009 1:04 am
Subject: Re: Re: Linux Programs for RXTX v6.3
priddix
Send Email Send Email
 
andrew.nilsson wrote:
>
>
>
> --- In softrock40@yahoogroups.com <mailto:softrock40%40yahoogroups.com>,
> Sid Boyce <sboyce@...> wrote:
>> Linrad seem the closest thing, but setting it up is the problem. I tried
>> it yesterday, but I think the problem is the inability to tune the Si570
>> via e.g, the UBW.
>
> I might be able to help here. I'm looking at setting up a netbook with
> dttsp and encountering the same issues with the software. I've
> previously written code for Mac OS X to interface with Tony's I2C board
> and I'll look at porting this in a command line utility form to linux.
>
> As for GUIs and tying things together - that's a far longer term project
> but one which I've got some thoughts on. Too many projects, so little time!
>
> Dttsp is being developed for performance, one of the recent versions
> uses only 12-13% cpu on my MSI Wind (Atom N270) so the potential for a
> portable setup exists. The key issue seems to be the GUI performance,
> especially with these netbooks.
>
> Andrew vk6jbl
>

That would be very helpful as there is an array of software around, just
getting things to work following a clear route is what's needed. Most
software seems to be HPSDR centric.
Getting jack/qjackctl to work on openSUSE is problematical and I am
thinking of setting up a Kubuntu box soon.
Thanks
73 ... Sid.
--
Sid Boyce ... Hamradio License G3VBV, Licensed Private Pilot
Emeritus IBM/Amdahl Mainframes and Sun/Fujitsu Servers Tech Support
Specialist, Cricket Coach
Microsoft Windows Free Zone - Linux used for all Computing Tasks

#32952 From: "Randall family" <brandall@...>
Date: Mon May 4, 2009 1:50 am
Subject: Re: A little help from my friends? To K0AWU
wd4jqv
Send Email Send Email
 
Bill,
I use Winrad because an old version of it supports Windows 98.  On new computer I tried Rocky.  Winrad's dual spectrum/waterfall displays is very useful for digging weak signals; Rocky does not have this.  I have not tried PowerSDR.  As a panadaptor Winrad is very good.
 
I set up Winrad for SSB operation with 3.5 KHz bandwidth.  This gives me a 46.9 Hz resolution over +/- 22 KHz from my receive frequency and 7.8 Hz resolution in the 3.5 KHz where the SSB receive is set.  The 3.5 KHz high resolution segment can be moved anywhere in the +/- 22 KHz.  
 
I am not knowledgable about HOW to get a screen shot.  The only time it would be really interesting is in a contest.  Normally I have display on just in case there is one other signal on the band.
 
On another note: you do have permission to use any information I send you in your presentation and publication.
 
When is the deadline on getting your material in for proceedings of conference? 
 
73 Bruce  WD4JQV  EM94LV
----- Original Message -----
Sent: Sunday, May 03, 2009 6:24 PM
Subject: RE: [softrock40] A little help from my friends? To K0AWU

THANK YOU Bruce for your email and great details! Do you use Rocky or PowerSDR or Winrad? Any chance you could send me a screen shot or two when in use at VHF/UHF?

Good DX .. 6m open here today,

73  Bill  K0AWU  EN37ed


To: softrock40@yahoogroups.com
From: brandall@comporium.net
Date: Sun, 3 May 2009 17:51:29 -0400

----- Original Message -----
Sent: Sunday, May 03, 2009 5:49 PM
Subject: Re: [softrock40] A little help from my friends? To K0AWU


Hello Bill,

--- K2 IF is 4.915MHz. ---

I used a Softrock Lite V6.2 with Elecraft K2 IF.  This was used with 2 meter through 1296MHz converters
Modified 40 meter V6.2 model as follows:
    C3 = 120pF
    C4 = 100pF
    C21 = 200pF
    C22 = 3000pF
    JP1 = set for divide by 4
    L1 = stock 40 meter coil.  C21 change makes OK at 4.915 MHz
    T1 = stock 40 meter xfmr.  C22 change makes OK at 4.915 MHz
    X1 = Digikey X984-ND  19.6608 MHz 20 pF crystal.
   L99 = added inductor T25-6 core.   Between 10 and 15 turns of magnet wire as needed. 
 
This crystal caused a weak signal in passband, so I added small L in series with X1 to move frequency down.  Use just enough turns so that you don't here xtal/4 in IF.
 
To tap off signal I used a 220 ohm resistor in series at the input to the noise blanker module.  This resistor fed a 1:1 isolation transformer which fed an MAR3 MMIC.  The MAR3 drives the Softrock board.  I mounted softrock board inside K2 and put 2 RCA jacks on rear panel for IQ "audio" signals.
 
I used an old Dell 500MHz laptop with it's internal sound board, Win98, and WinRad version for Win98.  This worked well although my image rejection in the softtrock was only 15dB or so.  This is good enough to find signals as panadaptor.  The 500MHz computer is not quite fast enough and leaves holes in softrock audio.  It is still a very useful panadaptor!  I can detect beacon signals that I can't hear in K2.  This was easy to setup and just works when you start it up.
 
I later changed to a 2.2GHz win XP machine with Creative Audigy SE sound board.  This allows 96 kHz sample rate instead of 48kHz.  Unfortunately every time I get it working XP kills sound card settings on power down and up & I start alll over again.  Demodulated softrock audio is very good; when it works! 
 
I am one of the stone age people who would like to stay with Win 98, but the modern world won't let me!!!
 
73's & good luck on presentation
Bruce Randall WD4JQV  EM94LV

Recent Activity
Visit Your Group
Share Photos
Put your favorite
photos and
more online.
Yahoo! Finance
It's Now Personal
Guides, news,
advice & more.
Y! Groups blog
The place to go
to stay informed
on Groups news!
.



No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 8.0.238 / Virus Database: 270.12.15/2093 - Release Date: 05/02/09 14:23:00

#32953 From: Bill Davis Jr <CQbilld@...>
Date: Mon May 4, 2009 3:10 am
Subject: RE: A little help from my friends? To K0AWU
patbilldavis
Send Email Send Email
 
Thanks Bruce, good info .... I'm thinking mid June on the deadline... It varies a bit based upon the host.
Thanks also for your willingness for the info to be shared.

Screen shots can be obtained by using the "Screen Print" key on the keyboard. That captures an image that then must be pasted into an application that accommodates an image. Ie Photoshop, Word etc.

I use my Softrock for activity spotting also .. 2,902,1296 and 10Ghz .. GREAT for that isn't it?

73 and Good DX ... Bill K0AWU


To: softrock40@yahoogroups.com
From: brandall@...
Date: Sun, 3 May 2009 21:50:58 -0400
Subject: Re: [softrock40] A little help from my friends? To K0AWU




Bill,
I use Winrad because an old version of it supports Windows 98.  On new computer I tried Rocky.  Winrad's dual spectrum/waterfall displays is very useful for digging weak signals; Rocky does not have this.  I have not tried PowerSDR.  As a panadaptor Winrad is very good.
 
I set up Winrad for SSB operation with 3.5 KHz bandwidth.  This gives me a 46.9 Hz resolution over +/- 22 KHz from my receive frequency and 7.8 Hz resolution in the 3.5 KHz where the SSB receive is set.  The 3.5 KHz high resolution segment can be moved anywhere in the +/- 22 KHz.  
 
I am not knowledgable about HOW to get a screen shot.  The only time it would be really interesting is in a contest.  Normally I have display on just in case there is one other signal on the band.
 
On another note: you do have permission to use any information I send you in your presentation and publication.
 
When is the deadline on getting your material in for proceedings of conference? 
 
73 Bruce  WD4JQV  EM94LV
----- Original Message -----
Sent: Sunday, May 03, 2009 6:24 PM
Subject: RE: [softrock40] A little help from my friends? To K0AWU

THANK YOU Bruce for your email and great details! Do you use Rocky or PowerSDR or Winrad? Any chance you could send me a screen shot or two when in use at VHF/UHF?

Good DX .. 6m open here today,

73  Bill  K0AWU  EN37ed



To: softrock40@yahoogroups.com
From: brandall@comporium.net
Date: Sun, 3 May 2009 17:51:29 -0400

----- Original Message -----
Sent: Sunday, May 03, 2009 5:49 PM
Subject: Re: [softrock40] A little help from my friends? To K0AWU


Hello Bill,

--- K2 IF is 4.915MHz. ---

I used a Softrock Lite V6.2 with Elecraft K2 IF.  This was used with 2 meter through 1296MHz converters
Modified 40 meter V6.2 model as follows:
    C3 = 120pF
    C4 = 100pF
    C21 = 200pF
    C22 = 3000pF
    JP1 = set for divide by 4
    L1 = stock 40 meter coil.  C21 change makes OK at 4.915 MHz
    T1 = stock 40 meter xfmr.  C22 change makes OK at 4.915 MHz
    X1 = Digikey X984-ND  19.6608 MHz 20 pF crystal.
   L99 = added inductor T25-6 core.   Between 10 and 15 turns of magnet wire as needed. 
 
This crystal caused a weak signal in passband, so I added small L in series with X1 to move frequency down.  Use just enough turns so that you don't here xtal/4 in IF.
 
To tap off signal I used a 220 ohm resistor in series at the input to the noise blanker module.  This resistor fed a 1:1 isolation transformer which fed an MAR3 MMIC.  The MAR3 drives the Softrock board.  I mounted softrock board inside K2 and put 2 RCA jacks on rear panel for IQ "audio" signals.
 
I used an old Dell 500MHz laptop with it's internal sound board, Win98, and WinRad version for Win98.  This worked well although my image rejection in the softtrock was only 15dB or so.  This is good enough to find signals as panadaptor.  The 500MHz computer is not quite fast enough and leaves holes in softrock audio.  It is still a very useful panadaptor!  I can detect beacon signals that I can't hear in K2.  This was easy to setup and just works when you start it up.
 
I later changed to a 2.2GHz win XP machine with Creative Audigy SE sound board.  This allows 96 kHz sample rate instead of 48kHz.  Unfortunately every time I get it working XP kills sound card settings on power down and up & I start alll over again.  Demodulated softrock audio is very good; when it works! 
 
I am one of the stone age people who would like to stay with Win 98, but the modern world won't let me!!!
 
73's & good luck on presentation
Bruce Randall WD4JQV  EM94LV

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#32955 From: "kcmuthumani" <kelvinm@...>
Date: Mon May 4, 2009 4:27 am
Subject: Si570 CMOS version output voltage level
kcmuthumani
Send Email Send Email
 
Hi all,

I was wondering whats the best way to increase the output level of a si570 CMOS
version, I am planning to use it as the VFO in a receiver that has a SBL-1
mixer.

The output level of the CMOS version is not enough to drive the mixer, would a
simple transistor amp work or would it be better to use something else. The
input needs to be around 4v.

Thanks
Kelvin

#32956 From: "leon Heller" <leon355@...>
Date: Mon May 4, 2009 5:35 am
Subject: Re: Si570 CMOS version output voltage level
leon_heller
Send Email Send Email
 
----- Original Message -----
From: "kcmuthumani" <kelvinm@...>
To: <softrock40@yahoogroups.com>
Sent: Monday, May 04, 2009 5:27 AM
Subject: [softrock40] Si570 CMOS version output voltage level


> Hi all,
>
> I was wondering whats the best way to increase the output level of a si570
> CMOS version, I am planning to use it as the VFO in a receiver that has a
> SBL-1 mixer.
>
> The output level of the CMOS version is not enough to drive the mixer,
> would a simple transistor amp work or would it be better to use something
> else. The input needs to be around 4v.

I'd use an MMIC; an MAR-1 or ERA-1.

Leon
--
Leon Heller
Amateur radio call-sign  G1HSM
Yaesu FT-817ND transceiver
Suzuki SV1000S motorcycle
leon355@...
http://www.geocities.com/leon_heller

#32957 From: "jan.melis" <jan.melis@...>
Date: Mon May 4, 2009 9:43 am
Subject: Re: No Mail
jan.melis
Send Email Send Email
 
--- In softrock40@yahoogroups.com, "J.Melis" <jan.melis@...> wrote:
>
> Dear Tony, As I shall be absent a lot during the summer will you please put me
on NO MAIL to prevent my mailbox from overflowing. I shall email you when I
return. Regards Jan
>

#32958 From: "Frank" <ph2m@...>
Date: Mon May 4, 2009 3:12 pm
Subject: FW: Question about alternative frequency of SoftRock Lite II 20m
ph2meter
Send Email Send Email
 

Hello Tony,

 

I did send you the mail below to your gmail address, no reply until now, so I will try via the group:

 

Van: Frank
Verzonden: zondag 3 mei 2009 11:27
Aan: 'kb9yig@
Onderwerp: Question about alternative frequency of SoftRock Lite II 20m

 

Hello Tony,

 

After a successful demonstration about SDR at our radio club PI4KGL, I collecting orders of several SDR(receiver) kits to place a order with you (when possible) in the coming weeks,

one of our members wants to order a SR Lite II 20m option kit with a alternative center frequency of around 14.100 Mhz. , also I have a other one who wants a center frequency of around 14.180,

my question to you: will that be possible?

Thanks for your reply in advange and hope to do business with you again later this month.

 

73 de Frank PH2M (The proud owner of a working SR Lite II 40m)


#32959 From: "Kees & Sandy" <windy10605@...>
Date: Mon May 4, 2009 3:42 pm
Subject: Re: Si570 CMOS version output voltage level
keestheham
Send Email Send Email
 

A transistor would be fine.

73 Kees K5BCQ

---------- Original Message ----------
From: "kcmuthumani" <kelvinm@...>
To: softrock40@yahoogroups.com
Subject: [softrock40] Si570 CMOS version  output voltage level
Date: Mon, 04 May 2009 04:27:25 -0000

Hi all,

I was wondering whats the best way to increase the output level of a si570 CMOS version, I am planning to use it as the VFO in a receiver that has a SBL-1 mixer.

The output level of the CMOS version is not enough to drive the mixer, would a simple transistor amp work or would it be better to use something else. The input needs to be around 4v.

Thanks
Kelvin




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#32960 From: "oxleydavid38" <oxley.david@...>
Date: Mon May 4, 2009 3:59 pm
Subject: Rocky and Windows Vista
oxleydavid38
Send Email Send Email
 
I'm hoping the start SWL after many years - last listened seriously in late
1950's using BC348  so I'm keen to see how things have changed.

I have ordered,as a  self-present for my 70th birthday,from Radioworld UK, kits
for SOFTROCKS SOFTROCK-80-LITE v6.2  and the Software Defined Radio 80m
SOFTROCK-HF-LITE-USB 1.8-30MHz receiver. I could not find a source here in
France ( Nr Brest in Brittany).


Anyhow to get started before the kits arrive I have tried to install Rocky. I
have an HP Media Centre PC with Windows Vista Premium which I would prefer to
use as I can have the Windows menus in both French and English. I downloaded
Rocky zip and it unzipped OK. The programme apppeared to install (desktop icon
OK) but closes during or just after start up.

My installation of Rocky on  an older machine using Windows XP seems to work
fine  but the machine its slower and its Windows menus are only in French -
c'est la vie

Power SDR will load under Vista and appears to work.

Should I stick with it or try to sort Rocky out  - if so any ideas?

Thanks to all of you who have made such progress in ham SDR possible.

Dave

#32961 From: "g8voip" <g8voi.reeves59@...>
Date: Mon May 4, 2009 4:19 pm
Subject: Re: Rocky and Windows Vista
g8voip
Send Email Send Email
 
Hi Dave,

Welcome back!

It is unfortunate that you have already ordered the kits from that source, they
are considerably cheaper purchasing directly from Tony, KB9YIG, who produces the
kits.

As far as Rocky and Vista go, I have not tried it myself (Vista free zone here),
but there have been a lot of reported problems concerning sound cards failing to
be recognised by Rocky. Do a 'search' and look back through the older postings
and you should see how others have overcome this.

Rocky is the simplest SDR program to get running, and the one used for testing
during the kit build. Once you find your feet, programs like Winrad and PowerSRD
do offer a lot more facilities. Everyone has their own favourites!

Hope you have as much fun as I have had once you get the kits built,

73, GL, Bob G8VOI




--- In softrock40@yahoogroups.com, "oxleydavid38" <oxley.david@...> wrote:
>
> I'm hoping the start SWL after many years - last listened seriously in late
1950's using BC348  so I'm keen to see how things have changed.
>
> I have ordered,as a  self-present for my 70th birthday,from Radioworld UK,
kits for SOFTROCKS SOFTROCK-80-LITE v6.2  and the Software Defined Radio 80m
SOFTROCK-HF-LITE-USB 1.8-30MHz receiver. I could not find a source here in
France ( Nr Brest in Brittany).
>
>
> Anyhow to get started before the kits arrive I have tried to install Rocky. I
have an HP Media Centre PC with Windows Vista Premium which I would prefer to
use as I can have the Windows menus in both French and English. I downloaded
Rocky zip and it unzipped OK. The programme apppeared to install (desktop icon
OK) but closes during or just after start up.
>
> My installation of Rocky on  an older machine using Windows XP seems to work
fine  but the machine its slower and its Windows menus are only in French -
c'est la vie
>
> Power SDR will load under Vista and appears to work.
>
> Should I stick with it or try to sort Rocky out  - if so any ideas?
>
> Thanks to all of you who have made such progress in ham SDR possible.
>
> Dave
>

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