Has anyone replace 3cx800 with Russian tubes

Discussion in 'Amateur Radio Amplifiers' started by N8FVJ, Nov 16, 2019.

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  1. N8FVJ

    N8FVJ Ham Member QRZ Page

    Anyone made a 3cx800 conversion with Russian tubes & sockets? Or 4cx800 replace 3cx800?
    Last edited: Nov 16, 2019
  2. MM0IMC

    MM0IMC Ham Member QRZ Page

    One is a triode, the other is a tetrode. Different biasing and a grid supply are required, I believe.
  3. N8FVJ

    N8FVJ Ham Member QRZ Page

    Screen supply minor inconvenience vs $1600 of new 3CX800 if they can even be found. Or possible grounded screen?
  4. N8FVJ

    N8FVJ Ham Member QRZ Page

    The Russian GI-46B triode is likely the best to replace 3cx800. Anyone try this?
  5. W1QJ

    W1QJ Ham Member QRZ Page

    I think I’d rather walk on glass than to try and transplant GU74b tubes in place of 3cx800’s. That’s just me.

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