Preamp Deal of the Century

Hello ecclectique,
I am so fascinated by your kindness, experience and knowledge that I have waited until this hour (02.14 over here) for your reply. THANKS!
YES, you are right, I meant the 7027A. My RCAs and Westinghouses did a great job in my Heathkits. I also have a pair of new Sovtek 5881s. They do sound much inferior to the metal base 7027A's in the Syrah, but maybe it is just because they still are brand new. Anyway, I will try my burnt-in RCA 7027A's in the Syrah (I hope Mick isn't reading this ;-))
The tube seller is the most reputed and most expensive in Germany, thank god the previous owner paid him for these tubes, not me. If you would like to know who he is, just out of curiosity, you can email me privately and I will gladly give you his site address. This practice of wiping the branding off is very old, he has been doing it for many years. He then writes his name and the tube type in different colours depending on the quality of the tube according to his measuring, testing, matching etc.
A huge thanks for the rectifier tip, a Hytron GZ-34 is on its way here and hope it will reach me before Xmas. I know I need the metal base GZ-34, but before I spend what is big money for me for the metal base Mullard or Philips, I thought I should try the Hytron, see if the problem vanishes. No, I did not and cannot measure the Mullard GZ-37, I really hope that the rectifier tube is the problem.
Thanks for your kind words on my system, your systems are truly extraordinary (I have heard the TW once in a show twelve or more years ago, WOW!). My Quads have PK (absolutely great guy) treble panels, new EHT blocks and protection clamps. New PK bass panels maybe next fall. The Radford STA-25 MkIII is a really good match, indeed. Before the Syrah I used a (Bruce Moore designed) Precision Fidelity C-7a sp (with step-up trannies for MC inside). Not at all bad, not at all, but the Syrah is in a different league. Now if the problem could go before Xmas so that I can enjoy my LPs for more than a few minutes!
Many thanks and regards, ecclectique!
Best,
frankiealverti

It has been my experience that the regulators affect the sound much more than any of the 6SN7's. Yes, the WE 350B's are very expensive, but worth it, IMHO. The Genelex KT66's aren't even close to the WE's in my system. Since I have the 350B's, I haven't tried the 6F6's.

As far as the 6SN7's go, I have tried them all. The EH 6SN7's kicked out the Kenrad blackglass and Tungsol roundplates. Still have the Kenrads and the Tungsols, but they are sitting in a box. The EH's are just as good as the 'Rads and Tungsols and better than everything else.

It is my opinion that in most any other application the Kenrads and Tungsols would probably best the EH's, but I simply believe the 6SN7's contribute very little to the sound in the Supratek as compared to the regulators and the rectifier. Having rolled them all, I wish I had saved a bunch of monney on NOS 6SN7's and bought the EH's in the first place. Taking the money I wasted on NOS 6SN7's, I could have bought 3 pairs of WE350B's which do greatly affect the sound of MY Supratek.

Not trying to argue with Ecclectique, just offering a different experience.

Fiddler, thanks for your perspective. It is very much appreciated. You have tried so many tubes on your Supratek. My Syrah has a pair of matched GE side getter 6SN7s. I may buy the EH for a spare and try them in January. Best,
frankiealverti

Hello ecclectique, big disappointment. The GZ-34 did not solve the problem. On the contrary, with it in place of the Mullard GZ-37 the funny sounds began just a couple of minutes after begin of vinyl play... The GZ-34 is a Valvo with Mullard codes, not a Hytron. The seller wrote it measures good on his Funke tube tester. Any idea what else it could be? Thanks.
Regards,
frankiealverti

Ecclectique, thanks for your inputs. the 6bg6 tubes have a hat with wire on the top of it. Should i change it?

I experience lately with my system and i do not know that it is normal or not. When my JC1 is in stand by mode, i turn syrah on and the speaker produces no noise, boom.... But when the Amp is in the play mode and i turn on my syrah i hear the sound of boom from the speaker especially the woofer. IS there any wrong in my system?

Thanks and Happy Holidays