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trace elliot gp7sm 200

BigTunaBoy

By BigTunaBoy,
in Repairs and Technical

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BigTunaBoy

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Posted

Hey folks,

 

hoping someone can offer up any advice on some Strange high freq parasitic oscillation that appear on the positive part of sine wave around of 400hz. It causes some strange sounds and severe distortion.

 

I resoldered various stuff, replaced filter caps and a few others, shotgunned the transistors, still no dice

 

Any thoughts appreciated.

 

Many thanks

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