[punk_guy182]

I found russing ''supertubes'' selling for 27.05$: Dedicated Audio - Sovtek 6H30Pi Supertube Vacuum Tube

Do you guys think it is the DR version?

 

[Dept_of_Alchemy]

It's not. Those are just the current production Sovtek tubes, you shouldn't pay more than $20 per tube or $50 per matched pair for those.

 

[glitch39]

The DRs are totally different. I have both. And even before they fully burned in, the DRs sounded MUCH better.

YMMV of course - your weakest link in the chain is your limitation which may or may not show you the improvements of the DR

 

[punk_guy182]

I am having a heck of a hard time sorting out the Russian Supertubes.
Which are which and which sounds better?

I was recommended the Russian 6H30PI-DR power tubes in my MKIVse because they are the best of the best.
I ordered a pair of tested & matched Russian NOS 6N30P-DR from: 6N30P-DR - REFLEKTOR DOUBLE TRIODEs, NEVER USED - eBay (item 180310981305 end time Dec-03-08 06:47:44 PST)

Can someone confirm me that they are the same as the Russian 6H30PI-DR?

Thanks

 

[glitch39]

PG - yes, those look right. Not sure about the diamond markings in the back (if they mean anything)

Mine's from 1984 and do not have those diamond markings

There are three types :

6N30-EB - usually Sovteks (unless you stumble NOS one)
6N30Pi - either Sovtek or EH made
6N30-DR- Sorotev or Reflector notation, but the same plant essentially. pre-1990 desired

Soviet tube suffixes:

E - long life
B - high reliability
D - extra long life
R - extra high reliability
È (I, not H) - intended for pulse mode

 

[punk_guy182]

Glitch39: Yours are the 6H30P-DR.

Where do they fit? Are they same as the 6N30P-DR?
If not, what is the difference physically and SQ wise?

 

[glitch39]

In Russian, the N and H are interchangeable.

 

[Serge44]

Quote:

Originally Posted by glitch39 /img/forum/go_quote.gif PG - yes, those look right. Not sure about the diamond markings in the back (if they mean anything)

Markings in the back are the date of production: 9 month 1990 year and factory quality control mark usual for russian factories.

Difference between N and H.
We see H when it's written in Russian for internal market, the N is the same letter when it's written in English for export purpose.

 

[punk_guy182]

Quote:

Originally Posted by Serge44 /img/forum/go_quote.gif Markings in the back are the date of production: 9 month 1990 year and factory quality control mark usual for russian factories. Difference between N and H. We see H when it's written in Russian for internal market, the N is the same letter when it's written in English for export purpose.

Interesting. Thank you for introducing me to Russian language.