Heptode ·Heptode
5915A
Long-life dual-control heptode designed for computer and control equipment, supporting logic, switching, gating, and related functions during extended operation.
- Sections
- 1
- Base
- 7CH
- Socket code
- B7G
- Base pins
- 7
- Nominal heater
- 6.3 V / 300 mA
Description
Dual-control heptode intended for computer and control applications involving long periods of 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
- 7CH
- Socket code
- B7G
- Base pins
- 7
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 300 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
7CH - Terminal pinout
Electrical assignments shared by every tube using this base designation.
| Terminal | Section | Connection | Evidence |
|---|---|---|---|
| PIN1G1 | A | G1 — Control Grid Chart transcription; independent manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CH |
| PIN2G5 | A | G5 — Fifth GridGroup 7CH2 Chart transcription; independent manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CH |
| PIN2K | A | K — CathodeGroup 7CH2 Chart transcription; independent manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CH |
| PIN3H | — | H — Heater Chart transcription; independent manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CH |
| PIN4H | — | H — Heater Chart transcription; independent manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CH |
| PIN5P | A | P — Plate (Anode) Chart transcription; independent manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CH |
| PIN6G2 | A | G2 — Screen GridGroup 7CH6 Chart transcription; independent manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CH |
| PIN6G4 | A | G4 — Fourth GridGroup 7CH6 Chart transcription; independent manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CH |
| PIN7G3 | A | G3 — Suppressor Grid Chart transcription; independent manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CH |
Section ratings
1 physical section, each with unique specifications.
Section 1
Heptode
- Transconductance
- 0.0024 S
- Max plate voltage
- 250 V
Primary electrical section; promoted values taken from published ratings/characteristics where clearly readable.
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.