Data set 01
1956 RCA Transmitting Tubes
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristics
Maximum Operating Frequency
1200 MHz
Voltage - Triode (single high frequency) ·Triode
6F4
Acorn UHF power triode for high-frequency RF service.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- 7BR
- Socket code
- -
- Base pins
- -
- Nominal heater
- 6.3 V / 225 mA
Description
The RCA 6F4 is an acorn-type UHF power triode for RF amplification and oscillation at frequencies up to about 1200 MHz.
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- 7BR
- Socket code
- -
- Base pins
- -
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 225 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
7BR - 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
- 6000 Ω
- Transconductance
- 0.006 S
- Amplification factor
- 20
- Max plate voltage
- 250 V
- Max plate dissipation
- 3.5 W
- Max cathode current
- 30 mA
Acorn high-frequency triode for Class-A RF amplifier service.
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
195X General Electric Essential Characteristics
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Plate voltage
80 V
ClassA
Cathode resistor
105 ohm
ClassA
Plate current
13 mA
ClassA
Plate resistance
2900 ohm
ClassA
Transconductance
5800 uS
ClassA
Amplification factor
17
ClassA
Characteristics
Input capacitance
1.9 pF
Output capacitance
0.6 pF
Grid-to-plate capacitance
1.8 pF
Data set 03
1960 RCA Industrial and Communications Types
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristics
Heater Voltage
6.3 V
Heater Current
150 mA
Maximum Intended Frequency
1200 MHz
Oscillator service
Data set 04
1971 RCA HB3 Binder 3 of 7
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Heater voltage
6.3 V
Heater current
225 mA
Maximum DC heater-cathode potential
80 V
Plate voltage
180 V
ClassA
Grid voltage
-2 V
ClassA
Plate current
10 mA
ClassA
Maximum oscillator frequency
1500 MHz
Oscillator
Characteristic
Transconductance
6000 uS
ClassA
Amplification factor
20
ClassA
Capacitance
Grid-to-plate capacitance
1.9 pF
Grid-to-cathode capacitance
2 pF
Plate-to-cathode capacitance
0.6 pF