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Svetlana v. Genalex KT88 Tubes?

I have a pair of conrad-johnson Premier 8A monoblocks, each with 8 6550 tubes (plus six more small tubes). I have had two blow in the last week, and most are glowing very purple. They are currently Svetlana Winged C tubes. Someone has recommended Genalex KT88 tubes instead. Any opinions?

Thanks,

B.
bkrpdx

Showing 2 responses by bkrpdx

bkrpdx OP
24 posts
 
I should probably mention they are new, Russian-made Genalex tubes, not originals.

B.
bkrpdx OP
24 posts
 
Thanks for all the responses.

Elevick, "blow" may be a poor choice of words -- more like "fail" or "short." Definitely normal; the manual even reads:

"If an output tube shorts, this circuit will turn off the amplifier’s main power supply by tripping the front panel circuit breaker, and light a red LED to indicate the defective tube(s). If this occurs, simply replace the indicated tube(s), reset the fault indication circuit (turning off any lit red leds), check the plate fuse, and rebias the amplifier."

Both amps were just serviced at c-j.

B.
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