Data set 01
1963 Hitachi
Published operating points and test conditions from this source.
SECTION 1
Triode
Capacitance
Interelectrode capacitances published
1
See source table
Characteristic
Heater Warm-up Time
11 s
Voltage - Dual Triode (similar high frequency) ·Triode-Triode
5MHH3
Low-noise twin triode intended for VHF tuner RF, oscillator, and mixer service, providing high-frequency gain and frequency-conversion functions in television receivers.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- E7-1
- Socket code
- B12C
- Base pins
- 7
- Nominal heater
- 4.7 V / 600 mA
Description
Twin triode for VHF tuner RF oscillator and mixer service with low noise.
Socket description
Duodecar 12-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- E7-1
- Socket code
- B12C
- Base pins
- 7
- Nominal heater voltage
- 4.7 V
- Nominal heater current
- 600 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
E7-1 - 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
Triode
X-ray radiationInterelectrode capacitances
- Transconductance
- 0.0075 S
- Amplification factor
- 38
- Max plate voltage
- 200 V
- Max plate dissipation
- 1.5 W
Repeated identical physical sections represented by one populated row.
Section 2
Triode
X-ray radiationInterelectrode capacitances
- Transconductance
- 0.0075 S
- Amplification factor
- 38
- Max plate voltage
- 200 V
- Max plate dissipation
- 1.5 W
Second physical triode section; electrically identical twin 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.