So, based upon the documentation I put the quad cap stuff back together. Put all the tubes in (except the Rectifier) and powered it back up with a variac at low voltage and nothing blew up. At 50% to 60% voltage, the tubes were warm and the filaments lit up. After an hour or so, I powered it down and put the GZ34 in. I attached an IPOD for music and powered everything up (Variac Voltage was at 80%).
Sounded nice for 10-15 minutes, then the left channel dropped in volume and it had a hum. Powered down and moved the left side tubes to the right side and vice versa. Powered back up and had nice music again, then after 10-15 minutes had the reduced volume on the left channel and a hum. I took a pencil and tapped all over the chassis and the tubes and all the mechanical noise of the tapping came thru both speakers.
With music playing, tapping the left side of the chassis results in a scatchy (not clear) sounding output from the Left channel. Powered down, let the unit cool off and opened up the bottom cover. I spent the next 2 hours looking everything over and resoldering connections on the VTA Board and tube socket connections, also went over all the grounding connections with my soldering iron. Powered back up at 80% voltage and the music sounded better then before, but after 10+ minutes the left channel had reduced volume and a hum. Tapping stuff as before resulted in the mechanical noise coming thru both speakers.
Powered off, checked all solder points and made sure nothing was touching something it should not be touching and that no solder runs flowed to where they should not be. Did not find anything.
HELP!!! Any ideas or suggestions would be greatly appreciated.
Thanks in advance.