This is Marconi Triode (pre WWII) I can not identify.

Officine Radio Marconi Genova DES.1 is written on it, also serial numbers and Marconi paper labels

Marconi Triode

I put them here, because they use the same (jumbo) socket like US 211 VT-4C and German’s RS237. They are also the same size.

Despite asking on many forums and FB it’s still unidentified!


Click to see all 203 211 VT-4C triodes in stock


This Post Has 2 Comments

  1. David Thatcher

    I would compare one to a German SL50 used in radios in WWII and invented by Telefunken and see where that leads you.
    David Thatcher, Dallas,Texas.

  2. Jean Étienne allouch

    Looks to be thyratron gaz triode ,for power rectifier…

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