New Sensor (Mike Mathews - EH, Sovtek, et.al) has bought the rights to the Svetlana name in the USA. All current "Svetlana" tubes are from the same reflector factory in Moscow as the others.
the input tubes were Ei tubes Yugoslavia, they also build 6550 tubes.Okay lets put it another way .
What is the original type of 6550 s ken stevens put in his amps.
The manual states 6550C thats all
Ages ago, I had a CJ Premier 140 which used a quad of 6550 on each channel. A neat trick in improving sound quality was to blend a mix of 6550 tube brands e.g. a single TS nos black plate 6550 in each side with three original soviet tubes would give a nice taste of the glorious TS tone. The caveat here though is to use the same tube type rather than say salt and pepper different types like say KT88 with 6550.
As an aside, the nos 6h23 tube worked great in this amp, better than many of the usual respected 6922 suspects.
Sablon how did that CJ amp bias? Autobias, individual tube bias or pair/quad biasing. Very interesting idea about blending tubes, a way to stretch out those Tung Sols.What KT 120 s would you recommend then ??
I might buy a second hand JL5 amorphous core black path next year on the side ( less transformer hum apparently )
Then i have everything original .
Svetlana 6550 s in the JL2 sign mk 2 and KT 120 s in the JL5 also original
Sablon how did that CJ amp bias? Autobias, individual tube bias or pair/quad biasing. Very interesting idea about blending tubes, a way to stretch out those Tung Sols. (...)
That makes sense. i think individual tube bias is a great feature on tube amps that is often overlooked. Almost an essential feature if you want to run NOS output tubes as finding matched sets is virtually impossible these days.@Mendel - as Microstrip has correctly pointed out, this CJ amp was individually biased so there was no need for matched tubes. I note you mention Rogue Audio and fwiw I enjoyed both my 88 Magnum and Stereo 90. Great service from Mark O’Brien.
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