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6SL7 - your experience with the Russian tubes?

Want to get some new 6SL7 tubes for my old RCA amplifiers, and am thinking to try the Russian ones, due to their excellent price but for one concern.

I restored another RCA amplifier some time back which used 6N7 tubes.I ordered some Russian ones on eBay, straight from Ukraine.

When they showed up, they were ALL microphonic.. by contrast the old GE and RCA metal ones are much better. I ended up being able to use one of them, but had I known how they would perform I would have preferred to just find some NOS American tubes.

Does this concern extend to 6SL7s too, or are they better? I've had good luck with other Russian tubes in the past, but mostly Svetlana tubes.

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  Michael Percy Audio  

Topic - 6SL7 - your experience with the Russian tubes? - maxhifi 07:52:38 02/12/16 (29)
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