Data set 01
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 1
Tetrode
Characteristic
Heater Warmup Time
11 s
Plate Current
10 mA
Typical
Other
Plate Voltage
125 V
Typical
Screen Voltage
80 V
Typical
Voltage Tetrode ·Tetrode
4CY5
Sharp-cutoff tetrode for VHF television-tuner RF amplification. Its high-frequency characteristics suit sensitive front-end amplification in television receivers.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- 7FT
- Socket code
- B7G
- Base pins
- 7
- Nominal heater
- 4.5 V / 300 mA
Description
Sharp-cutoff tetrode for VHF tuner service in television receivers.
Socket description
Miniature 7-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- 7FT
- Socket code
- B7G
- Base pins
- 7
- Nominal heater voltage
- 4.5 V
- Nominal heater current
- 300 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
7FT - 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
Tetrode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 100000 Ω
- Transconductance
- 0.008 S
- Max plate voltage
- 180 V
- Max screen voltage
- 180 V
- Max plate dissipation
- 3 W
- Max screen dissipation
- 0.5 W
- Max cathode current
- 40 mA
- Rectifier max heater-cathode voltage
- 100 V
- Rectifier warm-up time
- 11 s
Reference/equivalence-only source: ratings/characteristics for this section are not reproduced; missing promoted values intentionally not inferred from the external 6CY5 datasheet.
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
1965 Sylvania Electronic Tubes Vol3
Published operating points and test conditions from this source.
SECTION 1
Tetrode
Other
Plate voltage
125 V
Screen-grid voltage
80 V
Grid 1 voltage
-1 V
Plate current
10 mA
Screen-grid current
1.4 mA
Characteristics
Plate resistance
125000 Ohm
Transconductance
8000 uS
Control-grid cutoff voltage
-6 V
Capacitance
Grid-to-plate capacitance
0.03 pF
Shielded
Input capacitance
4.4 pF
Shielded
Output capacitance
2.8 pF
Shielded
Data set 03
1965 Westinghouse Data Book
Published operating points and test conditions from this source.
SECTION 1
Tetrode
Characteristics
Heater Voltage
4.5 V
Heater Current
300 mA
Transconductance
8000 uS
RepresentativePublishedPoint
Plate Resistance
125000 ohm
RepresentativePublishedPoint
Grid-Plate Capacitance
0.03 pF
PublishedDirectInterelectrodeCapacitance
Other
Maximum Plate Voltage
180 V
Maximum Plate Dissipation
2 W
Plate Voltage
125 V
Screen Voltage
80 V
Grid Voltage
-1 V
Plate Current
10 mA
Screen Current
1.4 mA
Data set 04
1966 Tung Sol Electronic Tubes 1 of 4
Published operating points and test conditions from this source.
SECTION 1
Tetrode
Capacitance
Grid-to-plate capacitance
0.03 pF
Section1
Input capacitance
4.5 pF
Section1
Output capacitance
3 pF
Section1
Other
Plate voltage
125 V
VHFTuner
Screen voltage
80 V
VHFTuner
Control-grid voltage
-1 V
VHFTuner
Plate current
10 mA
VHFTuner
Screen current
1.5 mA
VHFTuner
Characteristic
Plate resistance
0.1 MΩ
Section1
Transconductance
8000 µS
Section1
Data set 05
1968 General Electric Co
Published operating points and test conditions from this source.
SECTION 1
Tetrode
Other
Heater Voltage
4.5 V
Heater Current
300 mA
Data set 06
1971 RCA HB3 Binder 4 of 7
Published operating points and test conditions from this source.
SECTION 1
Tetrode
Other
Heater Current
280 mA to 320 mA
Published nominal ± tolerance
Heater Voltage
4.5 V
At heater current 0.3 A
Warm-Up Time
11 s
Average
Plate Voltage
180 V
Inherited from explicitly referenced 6-volt parent type; heater variant
Screen Supply Voltage
180 V
Inherited from explicitly referenced 6-volt parent type; heater variant
Cathode Current
20 mA
Inherited from explicitly referenced 6-volt parent type; heater variant
Plate Dissipation
2 W
Inherited from explicitly referenced 6-volt parent type; heater variant
Characteristics
Transconductance at Reduced Heater Voltage
5900 µS
Inherited from explicitly referenced 6-volt parent type; heater variant