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Stock Schiit Freya 6sn7 Tubes (must read)

104.172.19.114

Posted on March 8, 2017 at 16:48:07
scruffy_
Audiophile

Posts: 1571
Location: Los Angeles
Joined: August 5, 2005



I'm now using the VT-231 RCA, black plates in the output stage of my Freya amp and went back to the stock tubes in the voltage stage. These stock tubes started out with a midrange glare, but then settled in very nicely.

What I want to emphasize, however, is that the stock tubes say 68HC, which happens to be a very rare Russian tube that's supposed to be similar to the Tung Sol oval plates according to Brent Jessee! See the attached link.

I asked Schiit who made these tubes but could not get a straight answer. All they said was that they get their tubes from several sources.

If anybody has additional information on these tubes, please let us know! My system never sounded this good! I gather that they are Russian re-issues, but I never seen them advertised.


~~~~~~~~~~~~~~~~~~~~~~~~~~~
"Humility is the true mark of genius. Just get used to it."
-Anonymous

 

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RE: Stock Schiit Freya 6sn7 Tubes (must read), posted on March 8, 2017 at 18:37:49
Steve O
Audiophile

Posts: 6645
Location: SE MI
Joined: September 6, 2001
They look a lot like the Russian 6H8C, a nothing-special version of the western 6SN7. Available NOS on epay from many Eastern European and Russian sellers. The ones in the pic seem to lack the springy metal mica positioning things that the so called military 68HC is supposed to have. How are they marked?

Regardless of all this, if they sound good, what more could you ask for?

 

They are simply blank or have 68HC marked on the tube, posted on March 8, 2017 at 20:06:18
scruffy_
Audiophile

Posts: 1571
Location: Los Angeles
Joined: August 5, 2005
Do a Google search and you pretty much come up empty. I would say that they are better than the Sylvania 6NS7Ws. I had the Sylvania tubes installed but felt I was missing a lot of what I was getting with the 68HCs.

~~~~~~~~~~~~~~~~~~~~~~~~~~~
"Humility is the true mark of genius. Just get used to it."
-Anonymous

 

RE: Stock Schiit Freya 6sn7 Tubes (must read), posted on March 8, 2017 at 21:22:23
ahendler
Audiophile

Posts: 4715
Location: San Antonio, Texas
Joined: January 24, 2003
Contributor
  Since:
January 14, 2010
I have used these and turned on several friends to them. They are great tubes
Alan

 

RE: Stock Schiit Freya 6sn7 Tubes (must read), posted on March 9, 2017 at 00:38:53
twystd
Audiophile

Posts: 2538
Location: Austin,Texas
Joined: December 9, 2000
Here they are. Most of the Eastern block sellers use the western spelling rather than the Cyrillic alphabet. 6H8C in Cyrillic = 6N8S in the western alphabet. See link below. These tubes are exactly like the description of the post you linked to.

 

I bought them!, posted on March 10, 2017 at 10:02:48
scruffy_
Audiophile

Posts: 1571
Location: Los Angeles
Joined: August 5, 2005
They're coming from Russia! Thanks for the tip!

~~~~~~~~~~~~~~~~~~~~~~~~~~~
"Humility is the true mark of genius. Just get used to it."
-Anonymous

 

RE: They are simply blank or have 68HC marked on the tube, posted on March 10, 2017 at 10:56:45
Mechans
Audiophile

Posts: 1557
Location: East Coast
Joined: May 23, 2004
The really expensive NOS Russian 6SN7 equivalent is a Melz Metal base. OK but the key are the plates, they are the hole plate variant. You'll have to get a good pair to decide for yourself if it is what you prefer sound wise

 

He can see the real McCoy, here, posted on March 10, 2017 at 11:59:09
Frihed89
Audiophile

Posts: 15121
Location: Copenhagen
Joined: March 21, 2005
I have a few pairs. The treble has a lot of energy and is sometimes bright. The NOS tubes that are still available from Russia and the Ukraine are highly microphonic.

 

Best I've ever heard are Meltz 1578 versions ...., posted on March 10, 2017 at 16:21:26
Naz
Audiophile

Posts: 2172
Location: Sydney
Joined: September 2, 2005
They are remarkably similar to the metal base 6H8C and likely the same tube but selected for performance. They are quiet, airy, extended, and so well balanced from top to bottom ... just superb!

Mine are 50's like these. I used to pick up a pair here and there for $25 but word got out.

Naz

 

"....but word got out." Putting it mildly, if those *used* ones sell near the asking price. nt, posted on March 10, 2017 at 16:45:54
Rick W
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Location: NJ
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Contributor
  Since:
March 22, 2002
nt

 

RE: They are simply blank or have 68HC marked on the tube, posted on March 10, 2017 at 20:25:47
ahendler
Audiophile

Posts: 4715
Location: San Antonio, Texas
Joined: January 24, 2003
Contributor
  Since:
January 14, 2010
No you come up with the tube store selling 6h8c tubes and the tube I reference below ( the russion 6h8c)
Alan

 

RE: They are simply blank or have 68HC marked on the tube, posted on March 10, 2017 at 20:29:27
ahendler
Audiophile

Posts: 4715
Location: San Antonio, Texas
Joined: January 24, 2003
Contributor
  Since:
January 14, 2010
Here is the Melz at the tube store $89.95
Alan

 

RE: They are simply blank or have 68HC marked on the tube, posted on March 11, 2017 at 06:14:45
Mechans
Audiophile

Posts: 1557
Location: East Coast
Joined: May 23, 2004
The hole plate tubes look like they are made with an Erector Set if you are old enough to remember them. The holes are circular however. I will look for aa link.

 

These look fake to me, posted on March 16, 2017 at 10:22:35
scruffy_
Audiophile

Posts: 1571
Location: Los Angeles
Joined: August 5, 2005
The real McCoy is rarer than the Tung Sol round plates and has 1578 stamp on the glass, heavy duty metal bases, T-shape plates with the holes in the sides, and spring steel plate supports like Tung Sol oval plate construction!

~~~~~~~~~~~~~~~~~~~~~~~~~~~
"Humility is the true mark of genius. Just get used to it."
-Anonymous

 

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