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-   -   preamp for pl504 amp (http://www.diyaudio.com/forums/tubes-valves/143977-preamp-pl504-amp.html)

flanagan 12th May 2009 12:00 PM

preamp for pl504 amp
 
hello, i'm building stereo amp with PL504 tubes:

http://www.b-kainka.de/roehren/Schaltung4.gif
http://www.b-kainka.de/roehren/nt1.gif

any ideas how to build one tube(two for stereo) preamp without additional transformer?
ecc81 cascode? does it work with 120V?

thanks.

-markku


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