2. amps-preamps
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OK to replace one power tube for amp?

I have Joule Stargate Monos that use the Russian 6C33C-B power tube, two per amp. One of them isn't holding bias very well... wandering a bit. Can I just replace the one tube? Each power tube is individually biased in this amp and I've heard that matching pairs with 6C33s is just not something that happens so it would seem ok to buy 1 but I didn't know if having tubes of different ages was bad.
dhcod

Showing 3 responses by dhcod

dhcod OP
706 posts
 
Thanks for the responses.

It's wandering 10-15% every day.
dhcod OP
706 posts
 
Exactly my question. My amp is a Joule Electra Stargate SET and after just talking with their service guy it looks like the bias problem may be related to the electronics, not the 6C33s. When I get the problem fixed, how do I know whether the 6C33s are good still? The amps sound great but they are probably 13 plus years old and I think the tubes are the originals.
dhcod OP
706 posts
 
Well put :)
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