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In Reply to: RE: Warmer sounding output tubes in VTA 70 posted by DannyR on August 18, 2016 at 17:17:20
Hey great read thanks!
Like Bob told me and I've posted that just changing out the center driver tube has a LOT of effect on the amp.
I've tried a half dozen or so in that position but no 12BH7's.
Right now I'm unpacking a new house. And I am SURE that a few tubes didn't make the journey so I feel an order coming up.
I'll keep that in mind.
Thanks
Follow Ups:
I am thinking about giving the vta70 board a second chance when I get around to putting back together a basket case st70 that I inherited. I'll try the 12bh7's/E80CC combo. I just have to figure out how to paint the transformers without going through too much hassle.
I hope you're tubes made it okay and if not that any that broke aren't the good ones.
I managed to re-paint my 70 trnsfrmrs with engine paint without removing them from the chassis, with a combination of removing end bell bolts and masking the chassis mounts. Took some creative masking and spraying, but I think overall it came out looking pretty good, and a huge step up from the ratty original.
that's great. did you do anything special to remove the rust on top of the laminations or just paint over it?
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