Siemens CCa vs. Amperex 6922 D getter

D,

I think the 300b amp may help the CCa not to be so bright and hard on the top end. With the Sylavina WM 6SN7 the CCa had it's toes over the line at times. With the TS RP it behaved itself . The Amperex works better with the Sylvania WM bringing out more of the top end.

I will hunt one down (Valvo) and see, hear what you are saying is true.

Thanks for the tip.

Siemens CCa's (pre 1968) are NOT the least bit strident, bright or glaring. Any system with a frequency imbalance/glare/sloppy bass/etc can make the very best tubes sound bad. That's just a fact of life. People that don't know any better will install a very transparent cable, interconnect or NOS tube in a system that isn't right to start with, and because the new component reveals a shortcoming in the system- blame the new component. I've watched those types chase their tails in this hobby for decades now. Of course- They're always right! Then again- SOME folks out there are teachable. Have fun!

08-03-08: Rodman99999
Siemens CCa's (pre 1968) are NOT the least bit strident, bright or
glaring

They CAN be VERY close to being so. SOME
listeners might even perceive them as being bright.

I've heard it in a couple of systems that have been VERY carefully dialed-in.
The users decided to uninstall the CCa tubes.

Now, if CCa tubes are too high performance for many to to deal with, then
this should be a VERY strong caution signal for many potential buyers.
Ferraris are great cars, but they're not suited to most drivers.

I agree that the Siemens Cca( late 50's,early 60's) grey plates are very special tubes. In the right circuit in a resolving system, they are truly magical. Unfortunately, they are getting rarer and more expensive as time goes on.

Mr T- You are correct about the "taste" factor. That's why I always preface my recommendation of the CCa with a note about their clarity and transparency, and mention the fact that some might prefer a "warmer" tube. Another possibilty is badly recorded source material. I've had just a few discs over the years that were obviously mastered on monitors without tweeters(or by a deaf engineers), the highs were so exaggerated. I've got one right now that I really like the lyrics on, but won't play on my system because it's recorded so poorly. I only listen to it in the car, with the treble turned way down. Mr S- That's why they(and the E188CC/7308) are so stinking expensive and rare now: In an accurate, resolving system- they just get out of the way of the music. Obviouly there are a lot of us that enjoy that attribute. Happy listening!!