JCM800 2204 build questions

Get support and show off your MetroAmp 50 Watt kit builds.

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toner
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Re: JCM800 2204 build questions

Post by toner » Thu Sep 01, 2011 11:17 pm

I hope that bias pot locks somehow. :shock:

Remove the 100pF cap mounted on the V1 socket and check pin 6 voltage again. If the voltage is close to where it should be, that cap is leaking DC and is garbage. You don't really need that cap anyway.

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demonufo
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Re: JCM800 2204 build questions

Post by demonufo » Fri Sep 02, 2011 4:07 pm

toner wrote:I hope that bias pot locks somehow. :shock:
Indeed, that is asking for trouble on the back panel where it can easily be unwittingly moved. I'd have put it on the chassis itself behind the pre-amp tubes rather than the back panel if it really HAD to be outside of the amp.
So I like purple, okay!!!!!!

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