Difference between Amperex 6922 pinched waist tube

My advice is only second hand from a pro tube dealer I use from England. I own the Siemens 6922 but not the CCa but even the standard West German one is perhaps the best of my growing collection, I just purchased a A "Marconi" = Mullard E88CC. A very different sound indeed. This is what he had to say on your question:

"The gold plated grid posts ,the pinched shape and the scarcity probably increase the 'tube ego' of the owner rather than please the user with the sound ;) I can't remember if I mentioned it before but I am certain one of the favourite 6DJ8 Ihave tried was the CV2493 otherwise known as theE88CC-01 . These were actually made to be better rather than selected like a CV2492/E88CC/6922/CCA"

That being said I have yet to find any CV2493s for sale-

Based upon the last comment made about 'tube ego'I must tell you that a very good friend of mine recently dropped 1350 US dollars on a total of 9 tubes.These were 6 TELE 6922 cca's and 3 regular low noise 6922's.He has the same pre-amp as me,a highly modified,Audio-Research SP-15.This takes only 3 tubes for the phono stage,and after the almost total re-build of the unit by GREAT NORTHERN SOUND,a mod specialist on audio research stuff,the performance went into the stratosphere.UNTIL he replaced his MULLARD's with the new HIGH PRICED SPREAD,which were cold,and thin.Actually they sounded dreadful!However to justify his purchase,and knowing I was coming over later that week,for a listening session,all he kept talking to me about was how GREAT the new tubes were.Needless to say,he got rid of all nine tubes(one set,and two back up sets)and went on to purchase,again, they had to be REALLY expensive or they could not be acceptable,to him, the most costly gold pinned Mullards he could find.Which are better than the previous batch,but,unless you are willing to do some 'tube rolling'you will never know!

I agree with the assessment of the Telefunkens, IK have only enjoyed them in Vintage integrated amps like Scotts, fishers, mac's. With modern eq. they have always sounded think to me. I do love the PW's though, they are my fav.

Nicksgems, Email me for info, i have them all, both USA and holland. I prefer them over any cca's I have ever heard, by a long shot.

The pinch waist made in Holland 6DJ8 D-getter from the 50s are even more rare than the 6922. They sound sweeter than any other 6DJ8 and 6922s.