German defence valves
Generally these use a special
base, and the type numbers consist of R for army (Wehrmacht) and navy
(Kriegsmarine) or L for the Luftwaffe. Other markings commonly found include
Eigentum der RLM (air ministry property; RLM stood for Reichsluftfahrtsministerium
which was the Government agency responsible for research and development
of aircraft and avionic systems), Kriegsmarine (navy) and Wehrmachtseigentum
(army property). BAL means Bau Aufsicht Luftfartsministerium, i.e. Air
Ministry Inspection.
German
Army/Navy
| 1st letter |
R |
Reichswehr (defence),
includes both Wehrmacht (Army) and Kriegsmarine (Navy) |
| 2nd letter |
D |
Dekametric wavebands |
| G |
(Gleichrichter) rectifier
or diode |
| K |
CRT |
| L |
Transmitting or power |
| V |
(Verstärker) Amplifier |
| 1st number
is heater voltage |
| 3rd letter |
A |
Cathode ray indicator |
| D |
Dual anode |
| G |
Rectifier or diode |
| H |
Hexode |
| L |
Speed modulation; laufzeit
tube |
| M |
Magnetic deflection tube |
| MM |
Double magnetic deflection
tube |
| MS |
Magnetic and electric
deflection tube |
| P |
Pentode |
| SS |
Double electric deflection
tube |
| T |
Triode |
| Final
number is power output in watts for power valves, coefficient of
amplification for amplifiers, or maximum rectified current for rectifiers. |
German
Air-force
two letters and a number (1st
letter L)
| 1st letter |
L |
Luftwaffe |
| 2nd letter |
B |
Kathodebeam tube (CRT) |
| D |
Sendtube (HF) |
| F |
Special (iconoscope, photocell,
...) |
| G |
Rectifier or diode |
| K |
Stabiliser |
| M |
Magnetron |
| S |
Sendtube (LF) |
| V |
Amplification tube (LF) |
| The number
was just a sequence number. |
| Exceptions:
SA (rectifier), SD (triode), SF (pentode) all with 1.9V heaters.
|
|