Finished my 50W Plexi... channel 1 not working :(
Posted: Sat Aug 25, 2018 10:47 pm
Hello everyone,
Could I please trouble you folks one more time for some advice. I built this to bass specs, btw
My build is complete, and channel 2 sounds good, but channel 1 is absolutely silent (not a peep with volume all the way up, from either input)
i am including my readings which are particularly sketchy for V1. The only other noteworthy things i can add is that i can't bias to 35-40, as the pot doesn't get me past ~20mV at full rotation. Also the heater voltages are a bit higher than I'd like. Not sure about anything else to be honest.
I have went over the entire amp with a fine tooth comb and don't see anything visually wrong. I just don't have enough smarts to dig any deeper. If anyone would like the challenge, I'd be VERY appreciative.
link to my readings:
https://drive.google.com/open?id=1NAijs ... 8TJL199-V4
link to photos of amp:
https://drive.google.com/open?id=10z__U ... iBirduz_iK
https://drive.google.com/open?id=1948OA ... PXofOw0UbY
https://drive.google.com/open?id=17uFAO ... l-y0yxs7ed
https://drive.google.com/open?id=1FRGw5 ... jEpvaB-Jew
Thank you in advance to all,
Stu
Could I please trouble you folks one more time for some advice. I built this to bass specs, btw
My build is complete, and channel 2 sounds good, but channel 1 is absolutely silent (not a peep with volume all the way up, from either input)
i am including my readings which are particularly sketchy for V1. The only other noteworthy things i can add is that i can't bias to 35-40, as the pot doesn't get me past ~20mV at full rotation. Also the heater voltages are a bit higher than I'd like. Not sure about anything else to be honest.
I have went over the entire amp with a fine tooth comb and don't see anything visually wrong. I just don't have enough smarts to dig any deeper. If anyone would like the challenge, I'd be VERY appreciative.
link to my readings:
https://drive.google.com/open?id=1NAijs ... 8TJL199-V4
link to photos of amp:
https://drive.google.com/open?id=10z__U ... iBirduz_iK
https://drive.google.com/open?id=1948OA ... PXofOw0UbY
https://drive.google.com/open?id=17uFAO ... l-y0yxs7ed
https://drive.google.com/open?id=1FRGw5 ... jEpvaB-Jew
Thank you in advance to all,
Stu