Data set 01
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Heater voltage
5.6 V
Heater current
450 mA
Voltage Pentode - Remote Cutoff (single) ·Pentode
5GM6
Semi-remote-cutoff pentode designed for AGC-controlled television picture-IF or related television amplifier service.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- 7CM
- Socket code
- B7G
- Base pins
- 7
- Nominal heater
- 5.6 V / 450 mA
Description
Semiremote-cutoff pentode for gain-controlled picture-IF stages in color and monochrome television receivers. Electrical ratings, characteristics, and capacitances were interpreted from the supplied RCA manual excerpt where reproduced; reference-only entries were not supplemented from outside sources.
Socket description
Miniature 7-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- 7CM
- Socket code
- B7G
- Base pins
- 7
- Nominal heater voltage
- 5.6 V
- Nominal heater current
- 450 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
7CM - Terminal pinout
Electrical assignments shared by every tube using this base designation.
| Terminal | Section | Connection | Evidence |
|---|---|---|---|
| PIN1G1 | A | G1 — Control Grid EIA chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CM |
| PIN2K | A | K — Cathode EIA chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CM |
| PIN3H | — | H — Heater EIA chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CM |
| PIN4H | — | H — Heater EIA chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CM |
| PIN5P | A | P — Plate (Anode) EIA chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CM |
| PIN6G2 | A | G2 — Screen Grid EIA chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CM |
| PIN7G3 | A | G3 — Suppressor GridGroup 7CM7 EIA chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CM |
| PIN7IS | A | IS — Internal ScreenGroup 7CM7 EIA chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CM |
Section ratings
1 physical section, each with unique specifications.
Section 1
Pentode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 200000 Ω
- Transconductance
- 0.014 S
- Max plate voltage
- 330 V
- Max screen voltage
- 330 V
- Max plate dissipation
- 3.2 W
- Max screen dissipation
- 0.65 W
Electrical characteristics cloned from explicit counterpart 6GM6; heater replaced by 5GM6 source values. Semi-remote-cutoff picture-IF pentode; screen-voltage operating limit is charted.
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
Pentode
Other
Maximum screen supply voltage
330 V
Plate supply voltage
125 V
ClassA
Screen supply voltage
125 V
ClassA
Cathode resistor
56 ohm
ClassA
Plate current
14 mA
ClassA
Screen current
3.4 mA
ClassA
Characteristic
Transconductance
13000 uS
ClassA
Plate resistance
0.2 MOhm
ClassA
Capacitance
Grid-to-plate capacitance
- to 0.036 pF
Maximum
Input capacitance
10 pF
Output capacitance
2.4 pF
Data set 03
1971 RCA HB3 Binder 4 of 7
Published operating points and test conditions from this source.
SECTION 1
Pentode
Capacitance
Grid #1-to-plate capacitance
0.036 pF
Input capacitance
10 pF
Output capacitance
2.4 pF
Other
Plate supply voltage
125 V
ClassA
Screen supply voltage
125 V
ClassA
Cathode resistor
56 ohm
ClassA
Plate current
14 mA
ClassA
Screen current
3.4 mA
ClassA
Screen input dissipation up to 165 V
0.65 W
Heater/filament voltage
5.6 V
DerivativeSheet
Heater/filament current
450 mA
DerivativeSheet
Heater warm-up time
11 s
ControlledWarmup
Characteristic
Grid #1 voltage at transconductance 60 uS
-25 V
Data set 04
1975 RCA RC30
Published operating points and test conditions from this source.
SECTION 1
Pentode
Characteristics
Plate supply voltage
125 V
ClassA
Screen supply voltage
125 V
ClassA
Cathode bias resistor
56 ohm
ClassA
Plate current
14 mA
ClassA
Screen current
3.4 mA
ClassA
Capacitance
Grid No.1-to-plate capacitance
0.036 pF
Unshielded Max
Grid No.1-to-plate capacitance
0.026 pF
Shielded Max