I have just purchased 200 NOS Russian tubes that I think Decware owner's will really enjoy rolling in their amplifiers!

It is a 6H2N, Russia's version of the 12AX7.  Almost identicle in specs but with a 6.3 volt heater on pins 4,5 just like the 6N1P, 6DJ8, 6922 tubes you are now using.  Difference is gain.  The 6H2N will have aprox twice the gain.

Should be here in a couple weeks and I'll list them in the catalog.

Steve

Would you consider cryoing a batch?

Bear in mind the improvement you heard in the cryoed power tubes.

John C.

[quote author=rmt  link=1151980939/0#3 date=1152057252]Are these to be used in a CSP or Select in place of the 6922/6n1p/6bj8? [/quote]


This, presumably, is the idea

Karl

For those interested, you can get tubes cryo'd where I do  http://www.cryoplus.com/ at a cost of $5.00 per tube with $20. minimum order.  I am having four 6H2N-EB (Russian Spelling) 6N2P-EB or EV (English spelling) cryo'd by Kathi at CryoPlus.  Found my tubes on the auction bay place and was pleased with the photos which showed quality construction from 1974 when the CCCP Soviet Union was still a powerhouse.  Should be interesting.  My Torii could use some extra gain.  

Funny though, the spec sheets would almost have you believe the 6H2N/6N2P has half, not double the gain of a 6N1P as max dissipation in watts of each triode of a 6N1P is 2.2 watts and a 6N2P is 1 watt dissipation.

What will double the gain get you on the Select front tube?  Won't distortion become a factor?  I ask this question seriously because I do not know much about electronics.  What I do know is that my Decware gear sounds "fabulous" (term borrowed from boead) and if Steve recommends it I will probably try it out. I would like to know what to expect though.  Any comments?

Chas it's a 6H2P not a 6N2P, maybe that's the confusion.  6H2P appears to be quite close to a 12ax7 as Steve says, and it is quite different from the 6H2N as well.

Dave

And good to hear from you too.  Well, I managed to confuse myself in trying to figure this out.  Trying to un-confuse myself: to the extent of my russian anyway, the 6H2N and 6N2P are similar or the same tube (as you just stated).  The 6H2P is quite different, apparently I looked it up in my own confusion.

6H2P:
http://www.mif.pg.gda.pl/homepages/frank/sheets/113/6/6H2P.pdf

6H2N:
http://www.gstube.com/data/?mmm=561

6N2P:
http://www.mif.pg.gda.pl/homepages/frank/sheets/113/6/6N2P.pdf

It appears that the 6H2N/6N2P have a mu of 100, so I would think the gain would be the same as a 12ax7 (100) compared to a 6922 (33), so that would seem to confirm Steve's comment.

Sorry for (my) confusion.

Dave

Well do let us know your impressions, and enjoy the amp (again).

Dave

how about a batch of Cryod tubes

The new tubes have arrived and are in stock.  These are NOS Russian 6N2P.  I've described them in the catalog as a high gain version of the 6N1P.

Using these in place of the 6N1P/6922/6DJ8 will add significant gain to the amp.  The sound has more dynamics and presence, it's a more live sound.

The tube catalog has been redone to include this tube and it is located near the bottom of the page.

https://www.decware.com/newsite/tubesets.htm

Which amp?  The CS?  We're not talking the CSP I'm thinking since it already has tons of gain.

Why is the tube complement for a SE84zs 10$ more expensive then a re-tube of a se84cs? Though all tubes are listed as the same ???

[quote author=Rap  link=1151980939/15#22 date=1154210726]Why is the tube complement for a SE84zs 10$ more expensive then a re-tube of a se84cs? Though all tubes are listed as the same ??? [/quote]

The ZS ships with the 6p15p-EV output tubes whereas the CS shipped with standard SV83's.

Thx Steve for bumping this thread.

Going to order two for my beloved CS...

I got mine yesterday, but haven't had time to explore, other than lighting them up for a few minutes. Interesting! I will need to do some A/B-ing. I should get them good and hot tomorrow when I get back from the track. Don't worry - I wear earplugs and keep a "soundproof" radio headset handy. I'll still have healthy ears after the Brickyard.

[quote author=erimille  link=1151980939/15#21 date=1153765294]

I ordered 4 with the thought of swaping in the high-gain ones to compare (1 for CS and 3 for CSP).   Adding gain to the CSP might be an over-kill, but i look forward to finding out
[/quote]

I've listened to this new tube now for a few days and I really like it in my CS (Steve mentioned not to use this for the CSP). Using this tube I certainly notice more gain, but there is a bit more "umph" as well that I woudn't associate with just simply being louder.  Both vinyl and CD have more presence -  its a good thing

--e

Hey Jeff,

The Taboo uses a 12A_7 type input tube.  This new tube, as I understand it, is only to replace the 6n1P/6DJ8/6922 types, which your 84Bs use.

Steve says: Quote:
 Though he also says : Quote:
, so it's a little confusing, but I don't think he means that it is a direct replacement for the 12AX7.  I could be wrong.

Hope that helps.

Scotty

Greetings everyone

I was probably one of the first people to receive this 6N2P tube and have had some discussions with Steve on this tube.  Steve said that this tube is will not directly replace the 12A-7 tubes because the 6N2P has a 6.3V heater similar to the 6n1p/6922 tubes whereas the 12A-7 tubes has a 12V heater.  When it says that this tube is Russia’s version of the 12ax7, it means that the 6n2p tube would produce a sound that would be similar to what you would get if your amp was wired to use the higher gain 12ax7 signal tube instead of the lower gain 6n1p/6922 signal tubes.

Hope this helps clear things up a little.

Best regards,
M W II

 There are tubes and there are TUBES!

Previously, my favorite tube in my modded Torii was a cryo'd 6N1P-EV of which I've shared quite a few here with other Decware fans.

I've done lots of listening and one gamble has paid off.  I bought four vintage NOS 1974 6N2P-EV with the bomb logo and marked CCCP, as well.  The construction is a little different than later versions of the same tube type.  Anyway, I had these four cryo'd and I then bought a stash of 16 vintage 1979 6N2P-EV which have NOT been cryo'd.

To make a long story short(er),  ::)  my 1974 Cryo'd 6N2P-EV are the best input tube I've ever heard, bar none.  I've compared this tube with the 1979 non-cryo'd version which sounds uncontrolled and honks dynamic changes, by comparison (but is still very good).  I've compared it with the legendary 1964 Siemens CCa which is great, but not as good as this 1974 tube.  I've compared it to the rare and wonderful ITT Lorenz 6922 of Stuttgart, Germany which comes in a fairly close second to the cryo'd 6N2P-EV, but the tube made at the height of CCCP power and prestige is simply more "you are there" real.

When judging a close call, my test is simply this -- which tube makes me want to listen more and why?  The cryo'd 6N2P-EV draws me into the music and declares the performers to be real and right out there in front of me more than any other.

So, if like me, you liked your cryo'd 6N1P-EV tubes as a previous best, go out and get the oldest you can find of the 6N2P, have them cryo-treated, burn them in for 100 hours and listen to the magic -- these tubes are my new ne plus ultra and by quite a margin over the 6N1P-EV cryo'd which were not quite as good as the cryo'd vintage Lorenz 6922 gold-pins.

6N2P-EV (EV stands for special quality and long life with lower microphonics, too) tubes can be found all the time on ebay from sellers in Russia and Eastern Europe for less than $5. each post-paid when buying at least 8.  Cryo treatment adds only another $5. per tube.

Anyone want some cheap Siemens CCa tubes? (just kidding - they will go on ebay for about $100. each as will the Lorenz and Valvo gold-pins).

Enjoy the music and get real, as in "you are there" REAL with some cryo'd 6N2P-EV - a real WOWSERS best in class.  

Hey Gnat Leader,

Mr. Wrestling #2 says Quote:

[quote author=Chas  link=1151980939/30#39 date=1158285407]The 6N2P, while it has a level of gain similar to a 12AX7, the tube works like a 6DJ8, 6922 or 6N1P.  Therefore, it is a perfect choice to replace the 6N1P.  12AX7 tubes use 12 volts to light the filaments whereas all the other tubes here mentioned use 6 volts on the filaments -- the two voltages are not compatible, but this is no concern to our use.  Go ahead and try the oldest, cryo'dest 6N2P-EV you can lay hands on.  Give it 100 hours of burn in and you could be wowed beyond your expectations as was I.   [/quote]

Supposing you have a compatible heating source, could you not simply wire up a switch to allow you to switch between 6.3V and 12V filament heaters so you could use both?
I think I have seen something about this elsewhere, but I know someone here probably has a product that has said feature in it.

[quote author=chrisby  link=1151980939/30#41 date=1158339051]
seriously, any time a $5 - $10 unknown tube kicks ass like this is great

Mr Vaughn has his own "private reserve" list of unsung heros, many of which can cost less than the charges for safe shipping.
[/quote]
Indeed, I do like the price on some of these signal tubes.
One such tip I got from him was about the AV7's, and by chance I was able to get the 2 which he suggested, and they are sweeeeet. And the shipping WAS more than 200% the price of each tube I got in that lot.

[quote author=chrisby  link=1151980939/30#41 date=1158339051]...and the sonic favorite of 3 input tubes we tried was an ancient Mullard 12AU7 [/quote]
I have to agree, the older Mullard AU7's are something special, they are just so well rounded in their presentation, good for any and all types of music IMO. They also seem to interface good with the input stage on my T-Amp, which is nice, because it can be tricky to find the right balance.

[quote author=fabjack  link=1151980939/30#43 date=1159445331]OHMS? I HAVE HEARD ABOUT THE Z UPDATE AND IF ANYONE COULD EXPLAIN THIS AS WELL PRICE, [/quote]

I think your talking about theEX update ??? Costs 98$

I'm getting occasional pulses of "white noise" with this tube in my Select-Ex. The bursts are soft, and only noticeable between cuts, but they are there. Anybody else?
Perhaps a faulty tube. With no tube tester----?
                                                     Don

Gotta chime in on this new tube from Steve. I received my two 6H2N's from Devon two weeks ago along with two TAD El 84-STR, installed them but have not really had a chance to sit and listen until last night. WOW! This little SE84CS  (RCA 5U4) is driving my Klipsch FR-82's and sounding so sweet, detailed and lots of UMPH! Although last Tuesday my wife was watching a DVD and mentioned some kind of a staticy sound off the left speaker, which I did hear (soft white noise bursts like Sam in USA??) but it only happened that night. Yesterday I listened to about 6 side of vinyl, and my wife and I must of listened to five or six full cd's and this amp is now what I envisioned it would sound like when I build it two years ago. Been thinking about that Mullard 5Y3 from tube sales...any one running one in a SE84CS and want to comment?? Long live tubes!!!