Data set 01
1950 Sylvania
Published operating points and test conditions from this source.
SECTION 1
Triode
Construction
Premium construction
Yes
Voltage - Dual Triode (similar) ·Triode-Triode
7759
Premium subminiature medium-mu twin triode intended for general-purpose amplifier service, combining two similar sections in a compact high-quality construction.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- -
- Socket code
- B8D
- Base pins
- 8
- Nominal heater
- 26.5 V / 90 mA
Description
Premium subminiature medium-mu twin triode for general-purpose service.
Socket description
Subminiature 8-lead
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- B8D
- Base pins
- 8
- Nominal heater voltage
- 26.5 V
- Nominal heater current
- 90 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
- Amplification factor
- 35
- Max plate voltage
- 165 V
- Max plate dissipation
- 1.1 W
Two identical triode sections; represented once under identical-section compression.
Section 2
Triode
X-ray radiationInterelectrode capacitances
- Amplification factor
- 35
- Max plate voltage
- 165 V
Second identical physical triode section; added to align rows with SectionCount without unsupported electrical promotion.
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.