 |
| Identical to |
HL210
|
| Similar
Tubes |
HL410 (Heater and shape different)
|
|
| Base |
Europe 4-Pin (A, 4A, B4, since 1914) (Codex=Eo)
|
| Was used by |
Radio/TV-reception etc. |
| Filament |
-: Direct /
-: Battery = /
If: 0.1 Ampere /
Vf 2 Volts /
|
| Description |
Mazda and Osram/Marconi manufactured. Mazda had the option of plain or metallised bulb. Suggested by Marconi as an alternative to the HL2 which had a higher gain and could cause instability. Va max 150V, Gm 0.87mA/V at Ia =1 to 5mA. -Vg 0 to 6. Osram recommends use as grid leak or anode bend detector and LF or HF amplifier.
|
| Literature |
Taschenbuch zum Röhren-Codex 1948/49
- - Manufacturers Literature
|
|
|
|
|
|
osram wireless guide 1931
Giuseppe Antonio Tusini
|
|
Tabu Röhren-Codex, 1948
Anonymous 15 Collector
|
|
osram wireless guide 1931
Giuseppe Antonio Tusini
|
|
|
