Hello bob12345678,
You can find some date on that tube at
http://www.tubes.ru/techinfo/AmateurRadio/gu-81m.html
Good Luck!!!
You can find some date on that tube at
http://www.tubes.ru/techinfo/AmateurRadio/gu-81m.html
Good Luck!!!
You seem determined to get Inverted Mode to work.
Have you seen Steve Bench's work:
http://members.aol.com/sbench102/inverted.html
It might be good to try e-mailing him too.
Please let us know if you make any progress!
Have you seen Steve Bench's work:
http://members.aol.com/sbench102/inverted.html
It might be good to try e-mailing him too.
Please let us know if you make any progress!
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