Russian tubes bye bye?

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Russian valves will still find theie way into the US......... the is no trade embargo planned like in Cuba.
There is also no reason for supplies to "dy up " if there is still world wide demand for them.

The same can be applied to the great Russian vodka. 🙂.
 
I found a strange patent while searching for 6BG6 references.
https://www.google.com/patents/US2640173
A magnet is held close to the tube to affect the electron beam. Getting tubes too close to magnets usually isn't recommended because they can magnetize the parts. Maybe a magnetic field can be used to reduce distortion and start a new tube craze.

The internals of vacuum tubes are made from pure nickel, a magnetic material. As such, the are sensitive to EMI and should be protected from all sources. Hanging tubes out in the air like they are some kind of laundry is a bad practice in my opinion.

General Radio, the great grand daddy of test gear, made a noise source that was a particular vacuum tube placed between two strong magnets. I used to have one a long time ago.
 
This song
Love - 7 And 7 Is - YouTube
is on this album
Nuggets, Vol. 9: Acid Rock - Wikipedia, the free encyclopedia
which I used to listen to years ago using a stereo 2 stage EF86/6267 preamp with National (USSR) EF86/6267 tubes. I like the way it sounded in a long room in my house which has a lot of wood paneling and curtains on 3 sides (over windows). I found the schematic in an old magazine (Audio?) and I believe its the same as or similar to the Mullard preamp here http://bottlepreamp.blogspot.com/ . I only put in two equalization networks in mine, one for a turntable and one for a tape head.


:drink:
 
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