Welcome! Need support, you got it. Or share you ideas and experiences.
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Is there any way to test a S.E.X. C4S board? I've built a pair of them, and they look fine, but not a peep out of the S.E.X. amps when I install them as part of the Magnequest transformer/choke upgrade. Both LED's light normally (I think) on one, one lights too brightly and the other stays dark on the other board. I did NOT orient the LED's improperly, though with their silver band hidden once they're in, visual inspection is no help in verifying that. But I was very careful while installing.
Thanks for any help anyone can offer. I don't do well with C4S boards: trouble with two out of three in different Bottlehead kits.
I have the same problem as yours.
http://buystiffnights.net
Each C4S board has three connections to the rest of the amp - high voltage, ground, and the driver plate (tube socket pin 5). If you check those voltages, that might give the forum members some ideas of what might be wrong.
Me too, I have the same problem as yours.
http://buystiffnights.net
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