2. amps-preamps
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Tube Amp, Preamp upgrades -- what did you do that improved your units?

Hi folks,
If you upgraded a point-to-point wired tube amp or preamp, what did you upgrade?
I assume capacitors, but was there anything else which you upgraded that made a genuine difference for the sound?
I am looking into improving the caps in my Quicksilver stuff, but before doing that, I am curious if there's anything in addition to caps which I should consider.
Thanks.
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Showing 2 responses by knotscott

knotscott
817 posts
 
When I rebuilt my Dyna 70s into VTA 70s, I added the VTA board, new power supply caps, fresh tubes throughout, and premium caps in the audio stage.  The biggest changes since then have been from rolling tubes.   I settled on RCA clear top 12AU7 driver tubes, 12BH7 in the center and Gold Lion KT66 output tubes. 

Some vibration isolation can't hurt.
knotscott
817 posts
 
@knotscott  -- I've been rolling tubes, too, and appreciate the KT66 mention. Want to try that; love the KT77s.

Be forewarned....burn in time for the GL KT66s is pretty long.  Bob Latino had suggested around 100 hours.  I think it took every minute of that.  I was honestly ready to give up on them and put them up for sale.  They were worth the wait.  Love them now.
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