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,...
... 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...
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...
... 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...
... 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...
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...
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...
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...
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@...
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...
... 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,...
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...
... 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...
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...
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...
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...
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...
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...
... 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...
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. ...
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...
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 ... ...
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...
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 ...
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