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Supratek Tubes and Tube Swappin' for Everybody

I will have a Supratek Chenin in my set up in a day or so. Since so many folks are rolling tubes around here I was hoping to garner a comprehensive list of everybodies favorite tube compliments. Be it NOS or NIB or WLATB (Whatever's layin around the basement)
Being that the "Deal of the Century" thread is a little more like a novel I figured this would be a good place to post questions and answers related to one subject of Supratek amps and pres.
On to the subject of me. I don't have immediate plans to swap tubes as I've figured that Mr. Maloney would supply us with something listenable for the break in period. But, since so many have reported such dramatic improvments I want to ask this question:
What is your favorite compliment for quietest gain and dynamics in the phono stage?
I will be using the Chenin exclusively for vinyl ( I don't have a CD player) and listen to loads of early rock and roll and Jazz bands, smaller jazz bands mostly, quartets and quintets. Some classical, the usual Beethoven and Mozart, but usually just a lot of loud garage rock.
Ok, now lets see what happens.
mc5baby
wc65mustang
524 posts
 
Larry,
If I'm not mistaken it is a Russian designed (and built) tube with very few, if any, substitutes. Ecclectique and Whoopadeedoo, please jump in here.

PS I just bought a dynamite pair of Siemens 7308 (circa 1972) to replace my Cca. Absolutely the finest 6922/Cca/7308 that I've ever heard. Quite expensive at $410/pr but after a few hours with them, I have no regrets whatsoever. Check them out if you are going to buy yourself a Christmas present. You'll flip at the extremely low noise level and spectacular dynamics. A breathtaking tube.

And by the way, Merry Christmas to all Supratek owners and everyone following this thread.
ecclectique
509 posts
 
Hi Gang. Larry/Mustang.....Yes, the 6h30 is a dual triode developed by the Soviet Army. There is no equivalent sub for it.Until the fall of the Big Red Machine,no one even new it existed. Victor Khomenko of BAT was one of the first to introduce it to the West and employ the 6h30 in a commercial design. He dubbed it "the super tube". More and more designers,DIY types as well as the industry giants [ARC,CJ etc]are now embracing this tube for use in audio circuit design and rightly so as it does possess some unique electrical characteristics that are ideal for use in audio circuits that other triodes simply cannot do. Unusually high filament current[transconductance]combined with very low plate resistance, as well as an ideal amplification factor whereby it can be employed as a single stage all by itself, without the use of any negative feedback or cathode followers. Not to mention it's a 10,000 hour tube thats very low in noise and microphony.
cello
645 posts
 
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Wc65mustang....Thanks for the heads up on the Siemens 7308 replacement for the 6922 position. I will check with Brendan and see what he might have on hand. I might even get them cryoed.
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David..... Thanks for the information on the Russian 6h30. Any idea as to where I might pick up another pair? I would like to see what cryoing them might do for the sonics. You never cease to amaze me with your tube knowledge and willingness to share....
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Thanks & Best Regards,
Larry
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ecclectique
509 posts
 
Hi Larry. Did you get yourself a Grange too? The partsconnexion.com up here in Canada sells the 6n30 as well as many nos tubes including the siemens ecc88's. Chris Johnson is the former founder and president of the now defunct Sonic Frontiers.A good guy and I think he provides a service for cryo'ing tubes as well.
whoopadeedoo
50 posts
 
I am assuming the Supratek can handle the 6H30. While often touted as a 6922 variant, it really is a much more demanding tube and should never be substituted into a 6922 application (though it's often safe to sub 6922 in place of gear designed for 6H30).

The 6H30 you should seek out is the 6H30P-DR. It's the premium version of this soviet tube, built with much better parts and tighter specifications. thetubestore.com has them in stock last time I checked.
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