After 2 tries at building separate kits I still get stuck with the same issue. A large spike in the centre of Rocky and no other signals to speak of. The first kit must have had some dodgy soldering as there were some weird voltages coming out the IC's. I got myself another kit and spent a lot more time constructing, checking etc and low and behold the same issue.
I won't give up with this idea but boy is it testing me....perhaps stepping away is the key and getting some guidance......any offers?
Alex - I've had this problem with my Softrock 40. If I remember correctly, I think that in my case the issue was resolved by checking and correcting the audio connections to the sound-card. Make sure you have good solid connections to your sound-card and good luck!
ReplyDeletedear alex.i have the 160 meter version of this.i put most of the caps/resistors/smt,s in the wrong places to start.you trace looks ok but has a high noise level.does it change if the sdr,s not plugger in or not powered up.you will get that picture with nothing connected.i used mine with an old compaq 400 and found the mains psu very noisy so used and old win98se desktop instead.i used it in the line i/p and mic ok.as this is a direct conversion set the transformer has to be wired correctly or it will be very deaf.i prechecked my sdr on a sope 2c if the oscillator was running and getting to the chips.have used the pc,s built in sound card on all pc,s.check for loops from l1 and t1.can check one kit out if you like
ReplyDeleteAlex,
ReplyDeleteTry the Softrock Yahoogroup plus for very very detailed guides:
http://www.wb5rvz.com/sdr/
I have a 6.2 lite set up for use as a panadaptor for my h/b Picastar plus a 40m xtal one and an 8.3 with the si570.
Duncan