The Amp Garage

sluckey wrote: ↑Tue Dec 05, 2023 4:09 am Put some solder down the top of the circled turret. Any better?

Thx for the suggestion! That was one of the things I tried. Good eye!

Got it! Bad solder on pin 4&5 so the heater wasn’t kicking on for that side. We now have a working amp! Thank you all for your help! Learned a few things thanks to you all!

V2: 1-231, 2-0, 3-0, 6-271, 7-231, 8-231

Cathode resistor off of pin 8 tests fine when pulled from circuit.

Got it! Sorted and that part is working now. Still issues with v2.

It looks as though the OT is connected to ring instead of to tip. If you wired that jack as per Rob's layout, then you have tip and sleeve hooked together and grounded for one OT lead and the other lead connected to ring. The OT secondary would be shorted when a plug is fully inserted. I think I fo...

Voltages are: V2: 1-270, 2-0, 3-0, 4-3.15, 5-3.15, 6-284, 7-270, 8-51, 9-3.15 Something wrong there. Should be more like this: V2: 1-158, 2-0, 3-1.04, 4-3.15, 5-3.15, 6-284, 7-158, 8-159, 9-3.15 I am definitely at 0 for pin 3. What does that mean I should be considering? My brain is mush from traci...

V4 is the 12AU7. Pin 6 is at 0. Pin 3,4,5,& 9 are heater voltages with 3 & 9 being wired for the artificial center tap.

Hi all, Trying to learn the troubleshooting process with a new build that powers up on a dim bulb but has no sound. Have researched stuff but am stumped. Any pointers are welcome. I have checked the audio path and have signal from input to through the bright volume to pin 2 of v2. If I send signal t...