Posted by colinhester [ 65.186.5.10 ] on March 13, 2005 at 21:45:27:
In Reply to: throw another preamp on the fire, boys! posted by Forty2wo on March 13, 2005 at 20:03:12:
I'm glad to hear you tracked down the hum. I was hopeing this was the problem and not a poorly wound Tx. I'll ground my pot tonight.
I thought I had the issue of isolation between the chassis and signal ground resolved, but there is still continuity. I thought the volume pot was the culprit, since I could lift it off the chassis and get infinite reistance. I need to see if a wire strand is causing the problem.
I'm really surprised that ESD killed the 2540 that easily. Mine took a direct hit when checking voltages. Let's just say I about wet myself - didn't shock me, but did get my attention. Do you need a couple of 2540s as spares? I could drop a couple more in the mail if you would like.
Are you going to do the amps next. I'm really excited. This whole process has been much more than I could have imagined......Colin
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