Data set 01
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Plate Voltage
110 V
Power Output
2.7 W
DynamicCoupledClassA;Driver=37
Characteristic
Plate Current
45 mA
Power - Triode ·Triode
25AC5G
High-mu power triode designed for low-voltage audio output service. Manufacturer operating data shows dynamically coupled Class A use from about a 110 V plate supply, producing roughly 2.7 W with 10 W maximum plate dissipation.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- IO
- Base pins
- 8
- Nominal heater
- 25 V / 300 mA
Description
Power triode designed for low plate-voltage output service.
Socket description
International Octal
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- IO
- Base pins
- 8
- Nominal heater voltage
- 25 V
- Nominal heater current
- 300 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
1 physical section, each with unique specifications.
Section 1
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 15200 Ω
- Transconductance
- 0.0028 S
- Amplification factor
- 48
- Max plate voltage
- 180 V
- Max plate dissipation
- 10 W
Published source values promoted where applicable.
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.