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-   -   PROTON 520 schematics (http://www.diyaudio.com/forums/solid-state/72493-proton-520-schematics.html)

prof_tournesol 24th January 2006 02:33 PM

PROTON 520 schematics
 
Hi all!


I just wondered whether anyone knew the schematics of this amp, or a link where i could find it ...
The reason is that I noticed a while ago quite a big amount of positive DC on the right HP output of my old '91 Proton 520 amp [+1500mV, not bad isn't it?], and, as the trim pot -that seems to be the Ov adjust- doesn't have any effect any more, I wanted to find out if it's the only one in cause or not.
I would also like to see how it's possible to turn this 520 into a 520B-like, ie, without any tone or effect key [tone, mono, bassEQ, etc...]. How to shunt them correctly...

many thanks in advance to all for your precious help!

Tryphon Tournesol

prof_tournesol 25th January 2006 05:00 PM

definitely nobody knows this cute sounding little amp ?

bye

Tryphon


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