EIMAC Experimental Twin Tetrode
Double tétrode
Doppel-Tetrode

Type not mentioned on the bulb, probably X-159, a dual tetrode combining parts from the then-emerging 4-125A with a pair of six-volt filaments from the 3C24.

 

Hauteur • Height • Höhe : 98 mm • 3" 7/8
Diamètre • Diameter • Durchmesser : max. 55 mm • 2" 1/8

 

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