GM70 is Russian directly heated power triode intended for use in military AM transmitters like modulator tube.It’s made in Ulyanovsk factory.Directly heated wolfram thoriated cathode, plate dissipation 125W, genuine triode capable for 30W SE amplifier.There is also copper plate version. Sounds much better, but smaller power.

I have more than 150 GM70 output triodes. Most of them were made in 70s and 80s. As I know they were made since WWII, but I have never seen them with date codes form 40s and 50s.

Perfectly matched quad from March, 79th, all tubes have the same factory code!!!


Click to see All OUTPUT TRIODES in stock

This Post Has 10 Comments

  1. Gustavo

    Do you have copper plate Ulyanovsk version?

    Thanks, Gustavo

    1. admin

      Not for sale at the moment …


        Do you have GM-70 Tube sockets


          Hello and thanks for your interest in,

          Yes I have GM70 sockets, how many do you need?

          Best regards,


  2. Eugene

    What is your price for pair of GM70?
    Do you have copper type?

  3. Marijan

    How much do you chagre for a piar of GM-70 tubes?


  4. Dennis


    How much forum a match pair including shipment tot the netherlands?

    Best regards

  5. Remis

    How can I buy a set off GM-70 copper plate version?

  6. Ola


    Do you currently have any GM70s (matched pair) either graphite or copper in stock and how much are they?

    Best Regards

  7. Chris

    Hi there
    Do you have any GM70s (matched quad) e graphite in stock and how much are they (including shiiping to Athens Greece?
    Thanks in advance

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