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ID = 20834
Tube type:  Screen-grid Tetrode   beam power   Power/Output 
Identical to 6FN5 = EL300
Similar Tubes
Heater different:
First year 1960 Tube leaflet collection E.Erb Analysis by original leaflets
First Source (s)
1960 : -- Collector info (Sammler)

Filament Indirect
Information source - - -   
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8gd_3.png 6FN5
Emilio Ciardiello

6FN5: J R
Jacob Roschy

Usage in Models 5= 1963?

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):5

Collection of



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