Looking for 1954 Magnatone Varsity 108 Schematic

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Looking for 1954 Magnatone Varsity 108 Schematic

Postby sitedrifter on Sun Jul 17, 2016 4:27 pm

I have this great 1954 Magnatone Varsity model 108 amp that was rewired to use a 12AX7 preamp tube. I want to return it to original specifications which was using a 5879 preamp tube.
If anyone has a schematic for the amp it would be appreciated if you can post a link to it. Currently the only schematics I can find are the later Varsity models that did use 12ax7 Tubes.


1954 Magnatone Varsity 108

Thanks

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Re: Looking for 1954 Magnatone Varsity 108 Schematic

Postby tubeswell on Tue Feb 14, 2017 11:03 pm

He who dies with the most tubes... wins.
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Re: Looking for 1954 Magnatone Varsity 108 Schematic

Postby tubeswell on Tue Feb 14, 2017 11:24 pm

Further to this, you could use the 6SJ7 circuit from the above amp as a template, but adjust the screen dropping resistor and Rk||Ck setup to suit a 5879. The RCA data sheet for this tube is particularly handy.

http://www.r-type.org/pdfs/5879.pdf
He who dies with the most tubes... wins.
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