Tube Amps / Music Electronics
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|2/17/1998 12:20 PM|
||Re: Marshall fixed bias|
Guys, there is no such thing as one single plexi design or one single plexi schematic. Gotta be flexible here. There are a lot of possibilities for what is going wrong. Personally, I would have tested the EL34 tubes before digging into the circuit. If this really is an old chestnut, shouldn't it be worked on by a pro?
|2/18/1998 1:44 AM|
Hi again, thanks for the response
and there sure are no one single schematic.
I for one have a couple besides the ones in
Mr. Pittman's book. The retailers got me
the schematic closest to the real thing.
Btw it was the coupling cap in the overheated
stage that was leaking.
I have consulted a couple of pro's, but they
all seem to have their different view in the
matter, some had not heard about such high
bias voltages. Anyway it is in working order
now at -51 Volts and everything seems fine.
Another btw since it has got the possibility
to be wired for almost any voltage, I can
sell it anywhere, does anyone know the value
of this "chestnut" in US, and the right
place to put an ad.
Thanks again for your help
|2/19/1998 10:56 AM|
I'll buy it cheap! I love chestnuts. Got a cab. too?
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