Data set 01
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Service
Sync clipper
SECTION 2
Triode
Other
Service
Gated AGC amplifier
Voltage - Dual Triode (dissimilar) ·Triode-Triode
4HC7
Dissimilar dual triode designed for television control functions, with one section used as a sync clipper and the other as a gated automatic-gain-control amplifier.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- -
- Socket code
- B12C
- Base pins
- -
- Nominal heater
- 4.2 V / 600 mA
Description
Dissimilar dual triode for television sync-clipper and gated-AGC amplifier service.
Socket description
Duodecar 12-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- B12C
- Base pins
- -
- Nominal heater voltage
- 4.2 V
- Nominal heater current
- 600 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
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 5200 Ω
- Transconductance
- 0.0044 S
- Amplification factor
- 23
- Max plate voltage
- 330 V
- Max plate dissipation
- 3 W
Dissimilar dual triode for television sync-clipper and gated-AGC amplifier service.
Section 2
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 53000 Ω
- Transconductance
- 0.0019 S
- Amplification factor
- 100
- Max plate voltage
- 330 V
- Max plate dissipation
- 1.2 W
Dissimilar dual triode for television sync-clipper and gated-AGC amplifier service.
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.
Data set 02
1966 Tung Sol Electronic Tubes 1 of 4
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
PLATE VOLTAGE
330 V
Maximum Ratings | PLATE VOLTAGE 330 330 VOLTS
NEGATIVE DC GRID VOLTAGE
100 V
Maximum Ratings | NEGATIVE DC GRID VOLTAGE 100 100 VOLTS
POSITIVE DC GRID VOLTAGE
0 V
Maximum Ratings | POSITIVE DC GRID VOLTAGE 0 0 VOLTS
POSITIVE TRANSIENT GRID VOLTAGE
60 V
Maximum Ratings | POSITIVE TRANSIENT GRID VOLTAGE 60 VOLTS
PLATE DISSIPATION
1.2 W
Maximum Ratings | PLATE DISSIPATION 3 1.2 WATTS
GRID CIRCUIT RESISTANCE
5 Mohm
Maximum Ratings | GRID CIRCUIT RESISTANCE 5.0 5.0 MEGOHMS
PLATE VOLTAGE
150 V
Maximum Ratings | PLATE VOLTAGE 150 150 VOLTS
GRID VOLTAGE
-1 V
Maximum Ratings | GRID VOLTAGE -1 -1 VOLTS
PLATE CURRENT
1 mA
Maximum Ratings | PLATE CURRENT 18 1.0 MA
TRANSCONDUCTANCE
1900 ΜMHOS
Maximum Ratings | TRANSCONDUCTANCE 4400 1900 µMHOS
PLATE RESISTANCE (APP ROX. )
53 ohm
Maximum Ratings | PLATE RESISTANCE (APP ROX. ) 5.200 53.000 OHMS
GRID VOLTAGE FOR
-2.2 V
Maximum Ratings | GRID VOLTAGE FOR 1 6 = 10 µ4( APPRO X. ) -13 -2.2 VOLTS