Data set 01
1955 Lorenz
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Audio power output
3 W
Capacitance
Input capacitance
7.6 pF
Output capacitance
6 pF
Power - Pentode (NOT beam) ·Pentode
HL90
Audio-output pentode designed for series-heater operation. Its power-stage characteristics suit transformerless or series-string equipment requiring dedicated low-frequency output amplification.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- B7G
- Base pins
- 7
- Nominal heater
- 19 V / 150 mA
Description
Audio output pentode for series-heater operation.
Socket description
Miniature 7-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- B7G
- Base pins
- 7
- Nominal heater voltage
- 19 V
- Nominal heater current
- 150 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
1 physical section, each with unique specifications.
Section 1
Pentode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 80000 Ω
- Transconductance
- 0.0041 S
- Max plate voltage
- 250 V
- Max screen voltage
- 250 V
- Max plate dissipation
- 12 W
- Max screen dissipation
- 2 W
- Max cathode current
- 56 mA
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.