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PostPosted: Wed May 11, 2016 5:24 am 
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Bottle Rocket

Joined: Wed May 11, 2016 5:11 am
Posts: 2
hi everybody,

I have a dc 5 amp but my clean channel has stopped working , lead works good,
I can hear that my master and gain still have effect on the loudness of the amp.
Also the high mid and bass of the clean channel have effect.
So it must be on the input side?!

Can somebody tell me what i can do to eliminate options or test the amp so i can replace or fix

best regards

faverey


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PostPosted: Wed May 11, 2016 5:48 pm 
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Mark III
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Joined: Fri Jul 29, 2011 12:52 pm
Posts: 357
Swap out the V1 and V4 tubes with know good working tubes.

V1A is the input stage of the Rhythm channel (it is possible with a 12AX7 for one side to go bad)

V4A & B are the 2nd and 3rd gain stages for the clean channel.

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