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S.E.X. C4S board problem

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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.

Follow Ups:

RE: S.E.X. C4S board problem - miolah 20:53:40 05/20/09 (0)
I have the same problem as yours.

http://buystiffnights.net
RE: S.E.X. C4S board problem - Paul Joppa 19:30:33 05/05/09 (1)
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.
- RE: S.E.X. C4S board problem - miolah 21:38:56 05/20/09 (0)
  Me too, I have the same problem as yours.
  
  http://buystiffnights.net

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