TM tube made by Metal. The filament of this tube was replaced by a new one, as can be seen by the two bulges in the glass on both sides. The tube still works.
Mazradia TM

Triode

Introduced in 1915

1 2 3 4

base
a f f g B4

 

Vf Af Va Vg mAa ra g gm
4 0.7 80 -1 6 25,000 10 0.4

 

Equivalent E, R, Universal

 

Deze pagina is voor het laatst bijgewerkt op dinsdag 10 oktober 2017