Data set 01
1950 Sylvania
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristic
Heater Voltage
6.3 V
Heater Current
100 mA
Other
OperationalAltitude
60000 ft
Voltage - Triode (single) ·Triode
7245
Reliable long-life high-mu frame-grid triode for stable voltage-amplifier service.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- 7B
- Socket code
- B7G
- Base pins
- 7
- Nominal heater
- 6.3 V / 100 mA
Description
Reliable high-mu triode with frame-grid construction, long life, and stable performance.
Socket description
Miniature 7-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- 7B
- Socket code
- B7G
- Base pins
- 7
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 100 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
7B - Terminal pinout
Electrical assignments shared by every tube using this base designation.
| Terminal | Section | Connection | Evidence |
|---|---|---|---|
| PIN1H | — | H — Heater EIA transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7B |
| PIN22P | B | P — Plate (Anode) EIA transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7B |
| PIN32G1 | B | G1 — Control Grid EIA transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7B |
| PIN4K | A | K — Cathode EIA transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7B |
| PIN51G1 | A | G1 — Control Grid EIA transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7B |
| PIN61P | A | P — Plate (Anode) EIA transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7B |
| PIN7H | — | H — Heater EIA transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7B |
| CAP1G4 | A | G4 — Fourth Grid EIA transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7B |
Section ratings
1 physical section, each with unique specifications.
Section 1
Triode
X-ray radiationInterelectrode capacitances
- Transconductance
- 0.011 S
- Amplification factor
- 50
- Max plate voltage
- 150 V
- Max plate dissipation
- 2.25 W
Published ratings and characteristics promoted from the supplied Sylvania source.
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.