[Tyrro]

For sale are rare 6H8C military grade Russian tubes, black "T" plates, nickel base, manufactured in 1950's and 1960's!!! NEW (NOS).
All tubes are brand new NOS - never used. All tubes have been tested very good (no grid leakage, no shorts) and read around 88, well above the minimum of 50 for a good tube.

Selling for $180 per pair or $90 per a single tube + shipping. (14 tubes available).

These rare high quality dual triodes from 50's and 60's feature superior sound quality and extended durability. 6H8C is a direct equivalent of the 6SN7, 6SN7GT tubes.

Here's a quote from a popular tube site:

"...This is a rather difficult to find Russian made tube that is a direct replacement for the 6SN7. This tube can be confusing to buy for the novice, as there are several versions available. The common version has a medium glass envelope and a black plastic base, and are still in production in Russia. They are of fair to medium quality, but certainly are not worth much more than $20.00 each. THE RARE VERSION, and the one to look for is the Russian military version. This tube has a medium glass envelope, with a nickel collar around the base. It has black T-shaped plates facing each other, with or without small holes in the sides of the plates. There may be an "OTK" quality control mark inked on the base, and the tube type is etched within a circle on the glass. These military tubes are rare, and are built like the Tung Sol oval plates, with spring mounted spacers at the top touching the inside glass, and heavy support rods for each plate element. These tubes have incredible air and accurate bass, kind of like what a Telefunken would sound like, if Telefunken had ever made a 6SN7! They are amazingly dynamic, and at the same time delicate, and very quiet.
- Brent Jesse Recording & Supply, Inc....." http://www.audiotubes.com/6sn7.htm

These tubes are actually rarer than the fabled Tung Sol oval plates, and according to  Brent Jessee, these actually sound better than the famous Tung-Sol round plates.

Here are some more images:



1952 tube.


1953 tube


1954 tube


1963 tube

[Tyrro]

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