Then he would need a simple voltage divider circuit.

Cheers & 73

Charles VE3HBB
   ----- Original Message -----
   From: w4wb
   To: FT817@yahoogroups.com
   Sent: Saturday, November 30, 2002 11:52 AM
   Subject: [FT817] Re: Portable--batteries


   Should be fine, but I suggest that you have both polarity and fuse
   protection.  You didn't state the battery characteristics.  Some I
   have seen here are pakaged units having 24 VDC.  If so, then that
   would be a problem.  MAX voltage for the 817 is 16 VDC.

   72,
   Barry -W4WB


   --- In FT817@y..., "Mike Doyle" <mike@p...> wrote:
   > I have some 17ahr batteries(gel) which were once used for golf caddy
   > cars.They are still in usable condition.
   >
   > Will there be any problems in using them for the 817 in portable
   operation?
   >
   > Mike
   >
   > G7JZJ/M3JZJ


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[Non-text portions of this message have been removed]

--- In FT817@y..., "Lorraine McNeil" <va3fcm@r...> wrote:
> Then he would need a simple voltage divider circuit.
>
> Cheers & 73
>
> Charles VE3HBB

A voltage regulator would be preferred.  Power loss in any case.
72,
Barry

How far do you want to carry the battery?  17AH will likely power an FT817
all weekend--but I would not want to carry it very far!
Rudy Marcelletti, K8SWD
----- Original Message -----
From: "Mike Doyle" <mike@...>
To: <FT817@yahoogroups.com>
Sent: Saturday, November 30, 2002 10:45 AM
Subject: [FT817] Portable--batteries


> I have some 17ahr batteries(gel) which were once used for golf caddy
> cars.They are still in usable condition.
>
> Will there be any problems in using them for the 817 in portable
operation?
>
> Mike
>
> G7JZJ/M3JZJ
>
>
> To unsubscribe from this group, send an email to:
> FT817-unsubscribe@yahoogroups.com and for a great FAQ ( Frequently Asked
Questions ) see http://groups.yahoo.com/group/FT817/database
> Some really good technical info at:
http://www.ussc.com/~turner/ft817pg.shtml
> Please note that your messages and files sent to this group may appear
anywhere on the Internet or in print without notice or compensation.
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>

Thanks for all the comments and advice.
As I forgot to mention ,the batteries are 12v.
At the present time 'portable' as far as I am concerned means taking the rig
by car and then setting up the station,with very little walking, so the
weight to a certain extent is not a factor,but thanks for the concern about
my health--Hi.


Regards

Mike G7JZJ/M3JZJ

Like a lot of things, I don't think there's a clear cut answer to whether
internal battery power or an external battery is "enough" for the FT-817. It
depends on your mission.

If you want to go out pedestrian mobile for an hour in the evening then one of
the internal battery packs would be just fine. If you're car camping, using a
horse, four wheeler, etc. to pack in gear, etc. then a bigger SLA probably isn't
a big deal either.

If a multi-day backpacking trip is a mini-DX-pedition then making room for
batteries and the FT-817 so you can get multi-band, multi-mode operation in a
really out of the way spot is something attainable. If radio work isn't the main
emphasis of the trip (gasp!) then a pocket full of AA cells and one of the
little single band CW rigs may be more appropriate for some evening diversion.

Tim, N9PUZ
http://www.qsl.net/n9puz

For those of you not on the HFPack group.  I thought you might enjoy
this tidbit recently posted:

> The 5w of the FT-817 is certainly not enough SSB power to *reliably*
> make contacts and make it worth the extra weight on the trip.  I am
> well aware that it *is* possible to make 5w SSB contacts but please
> note that I operate for fun and the extra weight in the pack when
> every gram counts is not worth the trouble of trying to make SSB
> contacts with 5w.

Mark
K1MKF

In case anyone is interested I have listed a 50 watt solid state amp
on E Bay. Ideal for FT817 as it only needs 100mW of drive for full
output.
The link is :
http://cgi.ebay.com/ws/eBayISAPI.dll?
viewItem&item=1942641403&ssPageName=ADME:B:LC:US:1

73

Malcolm KO6SY

> In case anyone is interested I have listed a 50 watt solid state amp
> on E Bay. Ideal for FT817 as it only needs 100mW of drive for full
> output.


Bearing in mind that this amplifier seems to have no output filtering it is
irresponsible to use it without adding such extensive filtering components.

Thanks

Pres Waterman, W2PW
GO BILLS!

--- In FT817@y..., "Mark Flanagan" <markf@c...> wrote:
> For those of you not on the HFPack group.  I thought you might enjoy
> this tidbit recently posted:
>
> > The 5w of the FT-817 is certainly not enough SSB power to *reliably*
> > make contacts and make it worth the extra weight on the trip.  I am
> > well aware that it *is* possible to make 5w SSB contacts but please
> > note that I operate for fun and the extra weight in the pack when
> > every gram counts is not worth the trouble of trying to make SSB
> > contacts with 5w.
>
> Mark
> K1MKF

I also read that message on HFpack.... So what is he to do?

Stay only on CW?
Take a nice shiny new FT-897?
Take an IC-706 or other small 100 Watt rig?

If he did the latter two, he would be carrying even more weight than
if just taking the 817.
If he did the first, he would still be QRP as most CW only rigs are
QRP kits etc. and he's still not guaranteed to make any contacts.

Or perhaps he would not take any radio gear at all. That then defeats
the object, as he posted the message on the HFpack group, a group
dedicated to portable operation.

He could of course take the 817 and a Palm computer and run PSK-31.
That way he would only need the extra weight of the Palm and the
connecting cable.

I thought that the whole point was operating from places that most
operators can't , or don't want to, operate from. The 817 gives us
this ability more than any other rig.

Even if he is just concerned about emergency comms, a 5 watt rig is
far better than no rig at all in those circumstances.

I think what he is trying to say, albeit in my opinion wrongly, is
that the 817 is not worth taking on his hikes as he doesn't get
guaranteed contacts. It's not worth him carrying the extra weight for
no useful purpose.
The whole point is to go out and TRY to make contacts.  It's better to
have tried and failed than not to have tried at all.

I doubt very much if he is a member of his local QRP club.

I run mainly QRP. Either from home or portable. If someone can't hear
me on my 5 watts then it doesn't really matter. It's only a hobby. No
one is going to die if I don't make the contact.

Regards
Darren

The FT-817... A great rig for the great outdoors!

I have just had a power lead made up.  It uses slightly thicker wire than
the E-DC6 cable.  One end is the plug for the back of the FT817, the other
end being the + and - bare wires to fix to the car battery.  I have had 3A
fuses placed in both wires, about 2 inches each from the battery end.  I
just want to be sure that I have done all this correctly before I go and
connect it up; don't want to make an expensive mistake.  I have avoided the
available cigar lighter plug option because I don't want all the car's
electrical rubbish in there when I'm trying to listen to HF.

---------------------
Tom Read M1EYP
Macclesfield, England
http://tomread.co.uk
---------------------

_________________________________________________________________
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It probably boils down to why did he go backpacking in the
first place. Many backpackers are not hams at all and the
primary purpose of their trip is to get some invigorating
exercise, enjoy the outdoors and the fellowship of their
companions. We hams go for the primary purpose operating
from unusual places and oh bye the way we enjoy the exercise
and outdoors too and the fellowship is not only with those
who came along with us but also with those hundreds or
thousands of miles away. It's a matter of priorities :-)

---
73, Rich - W3ZJ

> -----Original Message-----
> From: Darren [mailto:daz@...]
> Sent: Sunday, December 01, 2002 5:30 PM
> To: FT817@yahoogroups.com
> Subject: [FT817] Re: not enough SSB
>
>
> --- In FT817@y..., "Mark Flanagan" <markf@c...> wrote:
> > For those of you not on the HFPack group.  I
> thought you might enjoy
> > this tidbit recently posted:
> >

I just received the latest MCM Electronics flyer and they have
Duracell, "AA" 1800 NiMH batteries for $.89 ea. here is a link for
anyone interested.
http://www.mcmelectronics.com/Specials/specials-frame.jhtml
thought you all would like to know this.  Steve, KA4NRF

--- In FT817@y..., "Tom Read" <tommyread@h...> wrote:
> I have just had a power lead made up....

Tom,

YOu ought to incorporate a full bridge rectifier into that new power
cable.  It would add a couple of benefical features.

1.  The rectifier would reduce the supplied voltage abit, 1 volt or
so.  The rig likes lower voltages.

2.  The rectifier would eliminate any reverse polarity problems when
you throw it in that classic English motorcar. (Positive earth and
all that stuff.

Have fun with your FT817

Jim Zellmer
KA0VSL
South Carolina

So I get up this morning and decide that I need to put up a dipole
that I can use for just about any band I wish.  After 90 or so
minutes spent unraveling 134' of wire and feeding 100' of open wire
line under my house to the shack, I climbed as far as I could up the
only tree in my backyard and placed the feed point of my new dipole
at the 20' level.  The legs of the dipole slope to my fence (my lot
is only 65' wide) and bend along the fence line pointing west.  Guess
you could say I have an inverted vee on its knees.

The antenna is matched to my FT817 via an MFJ-971 tuner.  I ran
through all the bands and the antenna loads just dandy on 12, 15, 17,
20, 30, 40 and 80 meters.  Didn't try 10.  These antennas don't
like 10 meters much anyway.  Making note of the tuner settings for
each band, I created a little matrix for future quick-tuning tasks
and taped it to the top of the rig.  Feeling content that my antenna
was working OK, I went on and did other things.

Evening rolls around (right about now) and I decided to fire up the
rig and poke around 30 meters.  There was a pileup on 10.102 with
VP5/K5CM in the middle of it.  I tossed out NF6E/QRP and got a call
back.  Sig reports exchanged and that is that.

What a satisfying feeling it is to pump 5 watts into a piece of wire
atop a tree and communicate with a tiny island in the Atlantic.

Just thought I'd share this while it was fresh.

Using the OBP with HC4 element and while testing my homebrew tapped
vertical, all bands work fine except for 40m where I get feedback
when the OBP is on.  I tried the same setup on my outdoor longwire
and the feedback is gone.  The coax connecting the rig to antenna is
only about 12' long.  Is this the reason I am getting feedback?

It's also takes a readjustment of attitude if you are used to people
coming back to your call all the time. I don't really mind if I don't
work someone every time I turn the radio on. I have worked a lot of
countries with 5w (or 2 and a half watts) SSB and either a mobile
antenna or a a piece of wire thrown up in the trees. Not 100 (yet),
but I'm working on it. What was he using for an antenna? Maybe that's
where the problem lies. Maybe he should get a buddipole, judging by
the results of the 'shootout' on HF    Pack?
73 de Alun, N3KIP

--- In FT817@y..., "Richard B. Drake" <rich@w...> wrote:
> It probably boils down to why did he go backpacking in the
> first place. Many backpackers are not hams at all and the
> primary purpose of their trip is to get some invigorating
> exercise, enjoy the outdoors and the fellowship of their
> companions. We hams go for the primary purpose operating
> from unusual places and oh bye the way we enjoy the exercise
> and outdoors too and the fellowship is not only with those
> who came along with us but also with those hundreds or
> thousands of miles away. It's a matter of priorities :-)
>
> ---
> 73, Rich - W3ZJ
>
> > -----Original Message-----
> > From: Darren [mailto:daz@d...]
> > Sent: Sunday, December 01, 2002 5:30 PM
> > To: FT817@y...
> > Subject: [FT817] Re: not enough SSB
> >
> >
> > --- In FT817@y..., "Mark Flanagan" <markf@c...> wrote:
> > > For those of you not on the HFPack group.  I
> > thought you might enjoy
> > > this tidbit recently posted:
> > >

You said it all! Neat little report. Thanks for sharing it! 73/Tim NZ7C
   ----- Original Message -----
   From: NF6E
   To: FT817@yahoogroups.com
   Sent: Sunday, December 01, 2002 6:37 PM
   Subject: [FT817] Busted VP5 pileup w/5 watts - Ha!


   So I get up this morning and decide that I need to put up a dipole
   that I can use for just about any band I wish.  After 90 or so
   minutes spent unraveling 134' of wire and feeding 100' of open wire
   line under my house to the shack, I climbed as far as I could up the
   only tree in my backyard and placed the feed point of my new dipole
   at the 20' level.  The legs of the dipole slope to my fence (my lot
   is only 65' wide) and bend along the fence line pointing west.  Guess
   you could say I have an inverted vee on its knees.

   The antenna is matched to my FT817 via an MFJ-971 tuner.  I ran
   through all the bands and the antenna loads just dandy on 12, 15, 17,
   20, 30, 40 and 80 meters.  Didn't try 10.  These antennas don't
   like 10 meters much anyway.  Making note of the tuner settings for
   each band, I created a little matrix for future quick-tuning tasks
   and taped it to the top of the rig.  Feeling content that my antenna
   was working OK, I went on and did other things.

   Evening rolls around (right about now) and I decided to fire up the
   rig and poke around 30 meters.  There was a pileup on 10.102 with
   VP5/K5CM in the middle of it.  I tossed out NF6E/QRP and got a call
   back.  Sig reports exchanged and that is that.

   What a satisfying feeling it is to pump 5 watts into a piece of wire
   atop a tree and communicate with a tiny island in the Atlantic.

   Just thought I'd share this while it was fresh.




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[Non-text portions of this message have been removed]

Hello all, My little 817 suffers a lot of computer hash. Actually,
it's not hash from the computer, but from the computer's power supply.
The computer is a Dell lattitude Xpi laptop. I have used this computer
for years and it's always been very quiet when it comes to hash.
Recently, the power supply has been giving off S8 of hash when ever
it's powered up.
When running on the laptop's battery, and with all the computer to rig
cables  connected, I get very little noise, but as soon as I power up
the power supply I get S8 of hash.
The power supply doesn't even have to be connected to the computer.
The amount of noise is the same with or without all the compouter to
rig cables connected, so the noise isn't getting in through them.

The noise blanker on the 817 has never been of any use on any kind of
noise including ignition etc.

I have fitted ferrite chokes to the input and output of the power
supply, and I have cores on the power leads to all my equipment, both
12V and mains.

I know that there are some very clever people on this group, and a
massive amount of knowledge (grovel grovel) so if any one has any
ideas please pass them on.

Thanks in advance

Darren
MW5HOC GW7HOC

I was trying to think of options for a compact battery set-up for my LDG
Z-11 ATU used in combination with my 817, and recalled that Polaroid had
developed a "flat" 6V battery used in some of their film packs.  I think I
may order a couple to use in series for 12V for the LDG (I am hoping I may
be able to bundle them in the "Tac Pac" I use with the Z-11 and LDG).  Cost
is too high (since they're non-rechargeable) and mAH is too low for the 817
itself.   Here is some information for those who may be interested:

description/data:

http://www.photobattery.com/P100.pdf

Price/ ordering (look under "Polaroid batteries):

http://www.photobattery.com/

[usual disclaimers-- no commercial affiliation, etc]

73
Trevor
KD1YT

Nice touch, but I cant remember the last positive earth car I came across.

24V is a problem but only on commercial vehicles and some ex-MOD but they
dont tend to have cigar lighters

David M0BWY


>2.  The rectifier would eliminate any reverse polarity problems when
>you throw it in that classic English motorcar. (Positive earth and
>all that stuff.


[Non-text portions of this message have been removed]

> 2.  The rectifier would eliminate any reverse polarity problems when
> you throw it in that classic English motorcar. (Positive earth and
> all that stuff.


Well, not exactly. When you touch the metal case of the 817 to that old
english motorcar, or connect the antenna, you will have the same problems.

A nit to pick, yes, but the example given would be disastorous.

.Pres Waterman.W2PW
c/o Patchogue 112 Ford//Kia 112
Long Island Ford and Kia Dealer

GO BILLS!

I've seen (I'm an EMI engineer by trade) laptop power supplies have
radiated emissions go up 10 dB to 20 dB just by moving wires nearer
to them. There is a substantial wideband magnetic field near these
switchers, and if you run a wire through it, you will have provided
and antenna to radiate it.

I've also seen emissions vary by a good deal depending on where even
short internal wires were routed, and if the mfr. runs long wires
inside, they can indeed move around.

Cortland


--- In FT817@y..., "Darren" <daz@d...> wrote:
> Recently, the power supply has been giving off S8 of hash when ever
> it's powered up.

I used to be one too, and I couldn't agree more. Routing the wires
carefully is 9/10ths of the battle with switching power supplies, as
most of the RFI is radiated. You may need 0.1 microfarads across the
output to control conducted RFI in a severe case though.

73 de Alun, N3KIP

--- In FT817@y..., "ka5s" <cortlandka5s@n...> wrote:
> I've seen (I'm an EMI engineer by trade) laptop power supplies have
> radiated emissions go up 10 dB to 20 dB just by moving wires nearer
> to them. There is a substantial wideband magnetic field near these
> switchers, and if you run a wire through it, you will have provided
> and antenna to radiate it.
>
> I've also seen emissions vary by a good deal depending on where even
> short internal wires were routed, and if the mfr. runs long wires
> inside, they can indeed move around.
>
> Cortland
>
>
> --- In FT817@y..., "Darren" <daz@d...> wrote:
> > Recently, the power supply has been giving off S8 of hash when ever
> > it's powered up.

Hello all. Just wondering if anyone has experimented with installing
a 6kAM filter in this radio, and is there a menu function to enable
switched filtering on AM? Haven't purchased this radio yet, probably
will, just wondering if this might be a option after purchase? I've
reviewed the specs on the INRAD site, the 6k 455 KHZ filter seems to
match the appropriate criteria.

Thanks to all.

Will, N1PXA

The 817 has four filter paths. One AM, one FM, one stock MuRata
ceramic filter (2.3 kHz) used for SSB, DIG, and CW, and one optional
path design for CW or SSB filter.  The paths are controlled
electronically.  I don't see a clear way to use the option slot for
an AM filter since when you select the AM mode/path, this new filter
wouldn't be in the loop.  No space for a direct replacement either.
73,
Barry - W4WB


--- In FT817@y..., "wbartlett666" <wbartlett666@h...> wrote:
> Hello all. Just wondering if anyone has experimented with
installing
> a 6kAM filter in this radio, and is there a menu function to enable
> switched filtering on AM? Haven't purchased this radio yet,
probably
> will, just wondering if this might be a option after purchase? I've
> reviewed the specs on the INRAD site, the 6k 455 KHZ filter seems
to
> match the appropriate criteria.
>
> Thanks to all.
>
> Will, N1PXA

I have searched on this topic and looked through an awful lot of
posts here and haven't come up with an answer to my query, so perhaps
someone can help me.
When I insert a "dummy" plug (one that has nothing connected to it)
into the external DC socket, it doesn't disconnect the internal
battery. Is this normal operation?
On connecting a 9.6V external pack to the radio, the radio won't take
the power. I know this because when I have the internal OPP disabled
(by inserting a dummy plug into the charging socket on the OPP), the
rig still won't power up on connecting an external 9.6V supply.
However, if I connect an external 12V supply, the rig powers up fine.
In message 23848, Barry mentions that when the external power is
below about 11.5V DC, the radio operates in a mode whereby it draws
power from the internal and/or the external battery. Barry also
mentions that he uses external 9.6V packs with no problem. My 9.6V
packs won't power the radio. I could go to external 12V packs, but
this would add extra weight.
Can anyone (Barry perhaps or anyone else) help me see the light with
my external power difficulties?
Dave.
AA7EE, Hollywood, California.

Hi

Sorry if this is a stupid question!

Has anyone tried to use a buddipole antenna on 90 meters?  Would the
combination of the buddipole and Z11 tuner make this a viable option?

Regards

Sean

Trevor (or anyone interested in experimenting with these batteries), you
may want to check with real estate companies to see if they will save their
used Polaroid packs for you.  Real Estate agencies used to use tons of
Polaroid film and some probably still do, if they haven't switched to
digital photography.
     The pack's battery will still have lots of use left after the film is
all shot, and they are lots of fun to experiment with.  I've considered
building a holder for them to power my FT-817, but have too many other
projects going!

Lonnie, N9IUI


_\/_
   /\
     \_ @ ,
     /__\\/\@
     (_)  (_)
N9IUI, QRP Bicycle Mobile
on "Buzz"
my 1999 Rans Rocket.
http://members.iquest.net/~n9iui

>
>    Date: Mon, 2 Dec 2002 07:01:32 -0500
>    From: "Trevor Lewis" <kd1yt@...>
>Subject: Flat batteries for Z-11
>
>I was trying to think of options for a compact battery set-up for my LDG
>Z-11 ATU used in combination with my 817, and recalled that Polaroid had
>developed a "flat" 6V battery used in some of their film packs.

_________________________________________________________________
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Congratulations, that's what QRP is all about!

-- //Steve//

Steve Silverwood, KB6OJS
Fountain Valley, CA
Email: kb6ojs@...
Web: http://home.earthlink.net/~kb6ojs_steve


> -----Original Message-----
> From: NF6E [mailto:my_online_id@...]
> Sent: Sunday, 01 December, 2002 17:37
> To: FT817@yahoogroups.com
> Subject: [FT817] Busted VP5 pileup w/5 watts - Ha!
>
>
> So I get up this morning and decide that I need to put up a dipole
> that I can use for just about any band I wish.  After 90 or so
> minutes spent unraveling 134' of wire and feeding 100' of open wire
> line under my house to the shack, I climbed as far as I could up the
> only tree in my backyard and placed the feed point of my new dipole
> at the 20' level.  The legs of the dipole slope to my fence (my lot
> is only 65' wide) and bend along the fence line pointing west.  Guess
> you could say I have an inverted vee on its knees.
>
> The antenna is matched to my FT817 via an MFJ-971 tuner.  I ran
> through all the bands and the antenna loads just dandy on 12, 15, 17,
> 20, 30, 40 and 80 meters.  Didn't try 10.  These antennas
> don't like 10 meters much anyway.  Making note of the tuner
> settings for
> each band, I created a little matrix for future quick-tuning tasks
> and taped it to the top of the rig.  Feeling content that my antenna
> was working OK, I went on and did other things.
>
> Evening rolls around (right about now) and I decided to fire up the
> rig and poke around 30 meters.  There was a pileup on 10.102 with
> VP5/K5CM in the middle of it.  I tossed out NF6E/QRP and got a call
> back.  Sig reports exchanged and that is that.
>
> What a satisfying feeling it is to pump 5 watts into a piece of wire
> atop a tree and communicate with a tiny island in the Atlantic.
>
> Just thought I'd share this while it was fresh.
>
>
>
>
> To unsubscribe from this group, send an email to:
> FT817-unsubscribe@yahoogroups.com and for a great FAQ (
> Frequently Asked Questions ) see
> http://groups.yahoo.com/group/FT817/database
> Some really good
> technical info at: http://www.ussc.com/~turner/ft817pg.shtml
> Please note that your messages and files sent to this group
> may appear anywhere on the Internet or in print without
> notice or compensation.
>
>
>
> Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
>
>

--- In FT817@y..., "Sean" <combers@y...> wrote:
> Hi
>
> Sorry if this is a stupid question!
>
> Has anyone tried to use a buddipole antenna on 90 meters?  Would the
> combination of the buddipole and Z11 tuner make this a viable option?

Sean,

It is not a stupid question.  I never bothered to try my commercial
buddipole on 90 meters ( 80M .. right?)  because I assumed that
it would not work well with my Z11/FT-817 combo.

The coils do need more inductance to resonate , and the whips do need
to  be longer to make it work efficienctly in the field. But.. can one
force the stock Buddipole to play on 80M with their LDG Z-11?
My hunch would be that the LDG would hunt around back and forth, and
then either yell uncle, or settle down around a red light.
The antennal will not be that efficient, but some power might be
radiated. The final SWR will probably be around 3:1 or the LDG
just won't match.

Like they say, don't assume anything. I would fire it up and see what
happens. There could be severe coax feedline losses here.
I am thinking of experimenting with adding more inductance to the
stock Buddipole (dipole configuration). Budd is working on it, and
doing experiments at the W3FF Antenna Works. He already knows that
some of us would eventually want 80M.
People out there are looking into this, and doing buddi-beta tests.

73,

Ken WB6MLC