Data set 01
1955 Lorenz
Published operating points and test conditions from this source.
SECTION 2
Pentode
Other
Audio output power
3 W
Other (weirdo tubes) ·Pentode-Tetrode
UEL71
Tetrode-output pentode combination designed for detector and audio-output service, integrating radio signal detection with loudspeaker-driving power amplification.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- -
- Socket code
- B8G
- Base pins
- -
- Nominal heater
- 45 V / 100 mA
Description
Tetrode-output pentode for detector and audio output service.
Socket description
Loctal 8-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- B8G
- Base pins
- -
- Nominal heater voltage
- 45 V
- Nominal heater current
- 100 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
Terminal pinout
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
Section ratings
2 physical sections, each with unique specifications.
Section 1
Tetrode
X-ray radiationInterelectrode capacitances
No fixed ratings are recorded for this section.
Audion detector tetrode section.
Section 2
Pentode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 70000 Ω
- Transconductance
- 0.0065 S
- Max plate voltage
- 250 V
- Max screen voltage
- 250 V
Output pentode section.
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.