Hi. I’m doing a build of the 500 series 1073 version. My knowledge of electronics is minimal. With gain at +60 I get an uneven noise from the preamp that seems to peek at around -28 dB. So quite a bit of noise. I’ve tried reflowing all the solder joints with no success.
Is there way to go through the board with a multimeter and check for any shorts or faulty components?
Couple things. First, is this one of AML's 500 series kits? I didn't think he sells his 1073-500 as kits any more. Which exact module are you building?
Second, any 1073/1290 style preamp is not to be undertaken by someone with limited DIY experience. Yes, there is a way to check for shorts and faulty components with a meter, but these are things you should already have learned on easier projects or from Internet research. Not to try to be totally dismissive of your question, but that's pretty much the answer you'll get around here if you would get an answer at all. Also, as with most any single ended +24V audio device (that I can think of anyway) it needs to be biased, which might be the reason for your uneven noise.
Thanks!
Paul