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In Reply to: RE: Shuguang Treasure KT88-Z vs PSVane KT88T with Cary posted by Mechans on January 02, 2017 at 05:27:22
Order RCA 6922 with gold pins and 'Made in Germany' stamped in black ink on box. These are early 1960s Siemens tube and are very good sounding. Order Sylvania 6SN7GTA. The 'A' after the 'GT' guarantees 1953 or earlier production. This is a clear sounding 6SN7. Later Sylvania does not sound as good as these tubes.
Follow Ups:
Yes, I have the GE 6SN7 GTA. Theyt sound musical and clear.
Aren't Penta lab tubes, select Chinese tubes?
Yes the Pentas are Chinese tubes.
Apparently not all Chinese tubes are bad. The Pentas have been around a long time, long enough to establish that they are reliable and sound good. Not so the Treasures and Psvanes which have been nothing but trouble for me in the Rogue.
Around so long they may have become extinct. Apparently the Penta run is over and the tube is now branded Prefered Series and some model of Ruby tubes. Claimed to be the same tube as the Penta.
Nunki is right, these Pentas have extended treble (for KT88) and a lot of drive and speed. I really like what I am hearing. The Siemen long plate ECC83 and Sylvania 6SN7W aren't hurting things either of course.
I would try these or the GL first before doling out for the PVs or Treasures.
Edits: 01/04/17
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