i have just finished my build of the amp10B and the soldering process went quite well I think, I replaced the R5 with 360ohm instead of the 120 ohm, the input gain is 22K and the modulator resistors are 8.2k. I have a 12v walwart that i tested the 5v section and it powered up adequately. I hooked up both rails to the 12v supply (I think in series-the power goes to the positive rail and i have connect cable running from that to the negative rail - just to test (i hope that wasn't crazy)) and tested them and they both read a voltage. I haven't heard the relay click though, but thought it might be that the voltage is too low for it to function (?).
I am wondering - do people think I am ready to hook up the tranny to the amp now? I have a 20v x 300va (ATN3220) toroid, with a 5A slow blow fuse.
one other question - I was thinking of acquiring an IR relay attenuator and selector that requires a 5v power source. Can I tap the 5v section on the amp for that?
thanks for any help.