Data set 01
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
MaximumOperatingFrequency
220 MHz
Voltage - Dual Triode (similar high frequency) ·Triode-Triode
6FC7
Tung-Sol 6FC7 frame-grid high-transconductance dual UHF cascode triode for RF amplification to 220 MHz.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- 9CC
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 6.3 V / 340 mA
Description
The 6FC7 is a frame-grid double triode intended for cascode amplifier service at frequencies up to about 220 MHz.
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
- 9CC
- Socket code
- B9A
- Base pins
- 9
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 340 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
9CC - 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
- Transconductance
- 0.022 S
- Max plate voltage
- 130 V
- Max plate dissipation
- 1.8 W
- Max cathode current
- 22 mA
Tung-Sol 6FC7 frame-grid dual UHF cascode grounded-cathode section. Max plate 130 V, dissipation 1.8 W, cathode current 22 mA, negative grid 50 V, grid resistor 1 MΩ. Typical Va 90 V, Vg -1.2 V, Ia 15 mA, gm 0.022 A/V. Shielded Cgp 1.9 pF, input 3.8 pF, output 2.5 pF, grid-heater <=0.3 pF. Cascode 220 MHz max, noise 5.5 dB.
Section 2
Triode
X-ray radiationInterelectrode capacitances
- Transconductance
- 0.022 S
- Max plate voltage
- 130 V
- Max plate dissipation
- 1.8 W
- Max cathode current
- 22 mA
Tung-Sol 6FC7 frame-grid dual UHF cascode grounded-grid section. Max plate 130 V, dissipation 1.8 W, cathode current 22 mA, negative grid 50 V, grid resistor 500 kΩ. Typical Va 90 V, Vg -1.2 V, Ia 15 mA, gm 0.022 A/V. Shielded Cgp 4.1 pF, Cpk 0.2 pF, input 6.3 pF, output 4.5 pF, Chk 2.9 pF. Cascode 220 MHz max, noise 5.5 dB.
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
1966 Tung Sol Electronic Tubes 2 of 4
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Plate_voltage
90 V
Section1,Section2
Grid_voltage
-1.2 V
Section1,Section2
Noise_factor
5.5 dB
Section1,Section2
Characteristic
Plate_current
15 mA
Section1,Section2
Capacitance
Grid-to-heater capacitance maximum
0.3 pF
Section1,Section2
Input capacitance
6.3 pF
Section1,Section2
Output capacitance
4.5 pF
Section1,Section2
Cathode-to-heater capacitance
2.9 pF
Section1,Section2