Data set 01
1960 Mazda
Published operating points and test conditions from this source.
SECTION 1
Pentode
Characteristics
Maximum heater-cathode voltage
150 V
Voltage Pentode - Remote Cutoff (single) ·Pentode
10F18
Variable-mu high-frequency pentode for gain-controlled RF amplification in AM/FM receivers using 100 mA series-connected heater chains.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 13 V / 100 mA
Description
Variable-mu high-frequency pentode for AM/FM receivers with series-connected heaters.
Socket description
Small-button Noval 9-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- B9A
- Base pins
- 9
- Nominal heater voltage
- 13 V
- Nominal heater current
- 100 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- Yes
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
Pentode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 400000 Ω
- Transconductance
- 0.0044 S
- Max plate voltage
- 250 V
- Max screen voltage
- 250 V
- Max plate dissipation
- 2.25 W
- Max screen dissipation
- 0.5 W
Ediswan/Mazda 10F18 indirectly heated variable-mu (remote-cutoff) HF pentode designed for AC/DC AM/FM receivers with a 13 V, 100 mA series heater. Published maximum plate 250 V, screen 250 V, plate dissipation 2.25 W, screen dissipation 0.5 W. Typical gm 4.4 mA/V at the listed 175 V anode and approximately 12 mA plate current; later Mazda revision (1961) lists anode impedance 400 kΩ, while earlier 1958 documentation gives 220 kΩ. The later value is promoted, and the source discrepancy recorded. Interelectrode capacitance and RF gain-control characteristics documented.
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.
Data set 02
1973 Mazda Valves Binder 2
Published operating points and test conditions from this source.
SECTION 1
Pentode
Characteristics
Heater or filament voltage
13 V
Published nominal value
Heater or filament current
100 mA
Published nominal value
Other
Maximum plate dissipation
2.25 W
Published maximum rating