Antique radios, Old Time Radios
D-87722
|
Country:
United States of America (USA)
|
|
| Identical to |
D-87722
|
| Similar
Tubes |
Other base:
231D
|
| Base |
Wires only.
|
| Filament |
Vf 3.1 Volts / If 0.06 Ampere / Direct / Battery = |
| Description |
Receiving triode, 231D bulb unbased, with flying leads. Mu = 8.5, Gm 0.38 to 0.56mS. 4000 hours life expectancy; controlled microphonics. Grid and filament spring supported by glass bead from top of plate. Used in 1A Pilot Channel (telephone level regulator of the twenties).
|
| Information source |
Tube Lore (I)
- - -
- - -
- - -
|
|
|
|
|
|
You reach this tube or valve page from a search
after clicking the "tubes" tab or by clicking a tube
on a radio model page. You will find thousands
of tubes or valves with interesting links. You
even can look up radio models with a certain tube
line up.
[rmxtube-en]
| Data Compliance |
More Information |
|
|
|
