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In Reply to: RE: Altec 340a and 440b - Found posted by cubsfan on May 05, 2014 at 20:36:50
Thanks to all….I'm going to take it to someone more knowledgeable. I know about mucking around amps and all that entails, but I don't know tubes (beyond the averagely informed audio fan) and certainly don't know about changing bias and using different tubes than specified. Sim-O-Rama in Totowa NJ is supposed to be run by a very knowledgable Altec guy (guru, some say) I think I can make it over there in a few days. Or there's an older repair guy/gear head more local to me that's been around since the days of tube. So, we'll see what one of them says.
Follow Ups:
Drat....the guy a Sim-O-Rama gave the polite brush off. Not that I can blame him, and I appreciate his honesty (not really his thing anymore, is too busy fixing present day DJ/PA gear, lost his touch in these things, but great nostalgia pieces from when he and his dad used to sell them). Thing is, I learned of this guy from a post either here on AA or another forum. Now I've got to go find the number for the one-man-repair shop/gear head. In the meantime, saw not one, but two pairs of the amps for sale on a popular auction type site. Funny how that happens.
You might want to ask a smaller music store where they take their tube guitar amps. They should be able to check the bias for you.
looking for some jazz and a little libations - joe strummer
The most important aspect of wisdom is knowing what you don't know. You have made a wise choice!
Dave
I have schematics for both if you need them - tbavis(at)rochester(dot)rr(dot)com
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