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Siemens CCa vs. Amperex 6922 D getter

I have a Audio Note P3 Silver with a Dodd battery pre amp. The Dodd calls for a 6922.

The Amperex WL GP PQ D getter in comparison to the CCa in my set up sounds dazed and confused. It is like a dirty window that needs cleaning when I insert the CCa.

I had the Amperex three weeks before the CCa came on the scene. When I first put the CCa in the music seemed to jump out of the speakers with such clairity that I was shocked that the Amperex somehow lost all that info.

So much for MR. Joe's report on the 6922. In my system they rock. I must say they work better with the TS 6SN7 RP than the Sylvania W metal. YMMV.

Anyone else have this experence?
glory
tvad
9,467 posts
 
08-03-08: Dsremer
Siemens gray plate CCA's are very detailed and can be bright in some applications. Amprex PQ,S less detailed more warmth will be less fatiguing in again some applications.
This mirrors my experience with these tubes.
glory's avatar
glory OP
1,373 posts
 
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.
rodman99999
3,557 posts
 
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!
tvad
9,467 posts
 
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.
sherod
1,681 posts
 
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.
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