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Messages 2523 - 2552 of 37924   Oldest  |  < Older  |  Newer >  |  Newest
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2523
Hello all. I am still assembling my Softrock these days. But i was thinking of purchasing a DDS and an Evaluation board. The distributors here in Pakistan,...
Farhan
fanoo
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Feb 1, 2006
9:08 am
2524
... From: "Lyle Johnson" <kk7p@...> To: <softrock40@yahoogroups.com> Cc: "Bill Tracey" <kd5tfd@...> Sent: Wednesday, February 01, 2006 4:43 AM ...
Leon Heller
leon_heller
Offline Send Email
Feb 1, 2006
10:19 am
2525
... HSC Electronics has the 100mhz. It is a Abracon full size, 5 volt model. Your Price $2.95 SKU 19525 http://www.halted.com/ I recently received one from...
Richard Gagnon
richg_1998
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Feb 1, 2006
12:58 pm
2526
Here's the answer. The solder paste never gets above 210 C to reflow. Check out the chart on this link: ...
John H. Fisher
austinham75
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Feb 1, 2006
1:35 pm
2527
Brian, I purchased my SB Live at Xmas model number SB0490 it has the following note on box. Due to data transferlimitations of the USB 1.1 connection, it may...
joe price
wa9cgz
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Feb 1, 2006
2:02 pm
2528
... to ... Hi Kees. What a brilliant observation! If a broadband front end works, then we simply need a 350pf variable cap at C25 for the luxury of manually...
market10gardener
market10gard...
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Feb 1, 2006
2:24 pm
2529
... Surface tension has allways pulled solder into vias and if you feed in more solder it comes out the other side. At least that's been my experience. I would...
windy10605@...
keestheham
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Feb 1, 2006
3:54 pm
2530
Kees, When I first received my SR40 I replaced the input transformer with a wide band transformer made by RELCOM. I was using a DDS board to supply the Xtal...
joe price
wa9cgz
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Feb 1, 2006
4:52 pm
2531
Thank you for the information. There are probably many "unknown" sources of electronic items that non-Silicon Valley people are unaware of. The only downside...
n3hkn
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Feb 1, 2006
6:24 pm
2532
Interesting. I've not tried any LF reception and would believe there to be problems due to the broadcast stations. As I mentioned earlier, since the BPF is...
windy10605@...
keestheham
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Feb 1, 2006
6:47 pm
2533
... From: "Bob Fish K6GGO" <rwfish@...> To: <softrock40@yahoogroups.com> Cc: "Bill Tracey" <kd5tfd@...>; <aqrp@yahoogroups.com> Sent: Wednesday,...
Leon Heller
leon_heller
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Feb 1, 2006
6:55 pm
2534
Good observation Joe, you discovered the Achilles Heal of the softrock type detectors! Although it's not a serious problem, you have to be aware of it and...
KY1K
ky1k@...
Send Email
Feb 1, 2006
7:16 pm
2535
OK, good point Art. They --do-- respond to harmonics and I can see how this would be a really serious problem for using it as an LF receiver design. 73 Kees...
windy10605@...
keestheham
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Feb 1, 2006
7:43 pm
2536
... have ... Definitely less time consuming than my idea! I appreciate the input. Since the pad on this is 2x2mm (CC2500) I could probably get 1 #68 in there,...
fargonaz
Offline Send Email
Feb 1, 2006
8:18 pm
2537
On the other hand, I tried SR-40 V4.0 and Rocky with a BPF for 80m, then switched to "direct" (no BPF ahead of T1) and could see no notable difference at...
windy10605@...
keestheham
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Feb 1, 2006
8:46 pm
2538
... I would expect that the SR40 would respond to even harmonics but mine responds ONLY to odd multiples of the rx frequency I don't understand why. Can...
joe price
wa9cgz
Offline Send Email
Feb 1, 2006
8:57 pm
2539
Disregard message below I cheched a 30mtr rx it responds to even and odd harmonics need more testing. ... scheme...
joe price
wa9cgz
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Feb 1, 2006
9:50 pm
2540
Disregard message below I cheched a 30mtr rx it responds to even and odd harmonics need more testing. ... scheme...
joe price
wa9cgz
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Feb 1, 2006
9:53 pm
2541
Not just odd and even multiples, it can respond to fractions 5/8....to keep unwanted signals, increased dynamic range, and keep the noise down you need a front...
kd5nwa
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Feb 1, 2006
10:36 pm
2542
I uploaded a component placement chart to the web site to assist the people who bought one of the SR-TR boards and want to build it up. This is --purely...
windy10605@...
keestheham
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Feb 1, 2006
10:38 pm
2543
Exactly ! I would much prefer an old tuneable WJ double tuned frontend ....but I don't have one, was going to adapt a Drake 2B preselector ...haven't done that...
windy10605@...
keestheham
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Feb 1, 2006
10:46 pm
2544
... the ... Kees, I just reconnected my test SD40 setup using DDS as 4x vfo although it will hear the even harmonic (way down) it's the odd that is...
joe price
wa9cgz
Offline Send Email
Feb 1, 2006
11:07 pm
2545
I see all the discussions on low noise sound cards and wonder if anyone has taken a look at the lower cost cards and found out what they didn't do ? better...
windy10605@...
keestheham
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Feb 1, 2006
11:34 pm
2546
You would expect the third harmonic to be the predominant one with no filtering. You are using the DDS-60 for the OSC on the SR-40, right ? set to receive 1Mhz...
windy10605@...
keestheham
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Feb 1, 2006
11:50 pm
2547
... no ... right ? set ... Kees, I'm using a DDS30 set to 4mhz connected to base of SR40 OSC transistor with feedback caps removed. I have a HP654 generator...
joe price
wa9cgz
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Feb 2, 2006
12:12 am
2548
I'm not familiar with that chip, most use newer chips, but if that is what you can easily get and it it's not horribly expensive, I would go ahead and get it. ...
kd5nwa
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Feb 2, 2006
12:28 am
2549
How do you do double sided PC boards with SMT on both sides. Will surface tension hold the SMT parts on the upside down side when you reheat? Bill WB5TCO...
Bill Dumke
billspiro1
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Feb 2, 2006
1:17 pm
2550
Thanks for the reply sir. ok than, i just ordered it. I hope i can get it to work. yeah its really not that expensive either. ... is ... would ... project ... ...
Farhan
fanoo
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Feb 2, 2006
2:47 pm
2551
Folks, I got my Softrock working fine on 40m, what an amazing piece of hardware ! When I tried to get it running on 14mhz, I found the oscillator dead. After...
Daryl P. Dacko
mirroromatic
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Feb 2, 2006
3:33 pm
2552
Hi Daryl, Please send me your mailing address and I will get one of the 14.06 MHz crystals in the mail to you. No charge when there is a bad part in one of ...
Tony Parks
kb9yig
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Feb 2, 2006
4:16 pm
Messages 2523 - 2552 of 37924   Oldest  |  < Older  |  Newer >  |  Newest
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