Data set 01
194X Wehrmacht Rohren
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Heater Voltage
12.6 V
Published technical-data value
Heater Current
240 mA
Published technical-data value
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater
- 12.6 V / 240 mA
Description
LD5 is a transmitting or UHF/dezimeter-wave triode intended for oscillator and RF amplifier service as specified in the approved German technical sheet.
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater voltage
- 12.6 V
- Nominal heater current
- 240 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- Yes
Terminal pinout
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
Section ratings
1 physical section, each with unique specifications.
Section 1
Triode
X-ray radiationInterelectrode capacitances
- Max plate voltage
- 500 V
- Max plate dissipation
- 15 W
- Max grid dissipation
- 2 W
Published ratings and characteristics promoted where directly established; additional values retained as parameters. Telefunken LD5 decimetric-wave transmitting triode for oscillators, amplifiers and pulsed anode-keyed operation. Maximum continuous anode voltage 500 V at long wavelengths; 2000 V applies only to short pulses at 1:100 duty factor (about 1 microsecond). Maximum plate dissipation 15 W and grid dissipation 2 W. Typical gm 8–12 mA/V at 200 V anode and 50 mA current. Two 12.6 V / 0.24 A heaters may be used in series. Sufficient cooling and correct prescribed sockets/contact systems are required.
Source-dependent data
Operating conditions by source
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.