Data set 01
1950 Sylvania
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Heater Voltage
26.5 V
Nominal published value
Heater Current
110 mA
Nominal published value
Voltage Pentode ·Pentode
7761
Premium high-transconductance subminiature video pentode designed for severe shock, vibration, high-temperature, and high-altitude operation. It combines wideband video amplification with unusually rugged environmental capability.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- 8DL
- Socket code
- B8D
- Base pins
- 8
- Nominal heater
- 26.5 V / 110 mA
Description
A high-transconductance premium subminiature video pentode intended for severe shock, vibration, high-temperature and high-altitude operation.
Socket description
Subminiature 8-lead
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- 8DL
- Socket code
- B8D
- Base pins
- 8
- Nominal heater voltage
- 26.5 V
- Nominal heater current
- 110 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
8DL - Terminal pinout
Electrical assignments shared by every tube using this base designation.
| Terminal | Section | Connection | Evidence |
|---|---|---|---|
| PIN1G1 | A | G1 — Control Grid EIA source transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 129, 8DL |
| PIN2G3 | A | G3 — Suppressor GridGroup 8DL2 EIA source transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 129, 8DL |
| PIN2K | A | K — CathodeGroup 8DL2 EIA source transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 129, 8DL |
| PIN3H | — | H — Heater EIA source transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 129, 8DL |
| PIN4G3 | A | G3 — Suppressor GridGroup 8DL4 EIA source transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 129, 8DL |
| PIN4K | A | K — CathodeGroup 8DL4 EIA source transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 129, 8DL |
| PIN5P | A | P — Plate (Anode) EIA source transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 129, 8DL |
| PIN6H | — | H — Heater EIA source transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 129, 8DL |
| PIN7G2 | A | G2 — Screen Grid EIA source transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 129, 8DL |
| PIN8G3 | A | G3 — Suppressor GridGroup 8DL8 EIA source transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 129, 8DL |
| PIN8K | A | K — CathodeGroup 8DL8 EIA source transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 129, 8DL |
Section ratings
1 physical section, each with unique specifications.
Section 1
Pentode
X-ray radiationInterelectrode capacitances
No fixed ratings are recorded for this section.
Published ratings and characteristics promoted from the supplied datasheet where legible.
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.