Antique radios, Old Time Radios
3D21B
|
Country:
United States of America (USA)
|
|
| Identical to |
3D21B
= CV5355
|
| Similar
Tubes |
Other shape (e.g. bulb type):
3D21A
Other class quality (otherwise equal):
3D21WB
|
| First Source
(s) |
30.Sep.1957 : Electron Tube Registration List 2017
|
| Predecessor Tubes |
3D21A
|
| Base |
Octal (Int.Octal, IO) K8A, USA 1935
Top contact with a cap.
|
| Filament |
Vf 12.6 Volts / If 0.85 Ampere / Indirect |
| Description |
Beam power tube intended to operate as blocking oscillator for pulse modulators up to 20KW. May also be used as deflection amplifier. Specially designed to utilize high-volume materials and production techniques, typical of receiving tubes.
Centre-tapped heater; may be operated at 6.3V, 1.7A. 15W plate dissipation.
Differs from 3D21A for the tubular T-12 bulb.
|
| Weight |
60 g / 2.12 oz |
| Information source |
- - Manufacturers Literature
|
|
3D21B: H.H.
Heinz Höger
More ...
|
Just Qvigstad
|
3D21B: H.H.
Heinz Höger
|
Collection of
|
|
|
|
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 |
|
|
|
