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The former German Wehrmacht used specially developed tube types, but not all of them were used. These tubes were never intended for civil use. Some types found after the war many applications as a replacement for non-procurable types, but also for the redesign of 'emergency radio'. Above all, the RV12P2000 was extremely widespread and was still produced for years. Incidentally, the term 'Wehrmacht' does not come into use until around 1936.
The Luftwaffe had its own valves, as did the Army. There seems to have been no cooperation, which can be explained by rivalry between the service heads. Of course, the requirements for an aviation valve are usually higher, parameters such as temperature range, acceleration, etc. affects the performance. But agreeing on a common type with higher specifications would have been more economical than splitting it into several slightly different types, each of which required its own manufacturing.
Of course, this also caused different naming systems:
| Aviation: |
L | Always the first letter |
Second letter | |
B | Brown tube (cathode ray tube) |
D | Decimetertube for wavelength below 1 m |
F | iconoscope, image converter, photocell, electron beam-switch |
G | rectifier, special valves for pulse generation |
K | Constant holder (variable resistors, stabilizers, glow lamps) |
M | Magnetictube |
S | Transmitter tube for wavelength below 1 m |
V | Amplifier tube for wavelength below 1 m |
Number | Consecutive numbering in the order of development |
| Army: |
R | Always the first letter |
Second Letter | |
D | Decimetertube for wavelength below 1 m |
G | Rectifier, diode |
L | Power amplifier valve, transmitter valve |
K | Cathode-ray tube |
V | Receiver |
| Amplifier valve serial digit = average heater voltage in Volts |
Third Letter | |
A | Tuning Indicator |
D | Full wave rectifier |
G | Rectifier |
H | Hexode |
L | Runtime tube |
M | Magnetic field Valve |
MM | Double magnetic deflection |
P | Pentode |
SS | Double electrical deflection |
T | Triode |
Code | A number or letter either consecutive numbering |
- | or power loss |
- | or theoretical gain factor μ |
Deviating from this, the army battery valves of the D series, whose designation scheme follows that of the broadcasting valves and differs only by the attached w: DAC41w DC41w DCH41w DDD41w DF41w DL41w.
The marking of the valves was carried out according to different systems by different army positions.
Reference: 3002 Konrad Birkner 12.08.2014.
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