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Tube replacement for Dynaco ST 70

I just purchased a highly modified Dynaco St 70 and it came with EH EL 34 and I would lke to replace them since I feel they are a liitle thin and veiled on the upper midrange and lower treble regions where the voices are produced. Any suggestions on replaceing them with tubes that will open up and unveil the voices. I can uses 6L6 or KT 66.
cavy

Showing 1 response by mlsstl

mlsstl
1,452 posts
 
A few years back, I modded a ST-70 and used 6L6GCs for the output. However, I had to replace the bias potentiometer in order to have enough range to accommodate these tubes.

Triode Electronics in Chicago has some some driver upgrade boards available that include excellent instructions for a variety of modification options.
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