Data set 01
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Plate voltage
125 V
ClassA
SECTION 2
Tetrode
Other
Plate voltage
125 V
ClassA
Screen voltage
125 V
ClassA
Voltage Radio Detector Converter ·Tetrode-Triode
5CL8
Triode-tetrode designed for VHF oscillator and mixer service.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- 9FX
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 4.7 V / 600 mA
Description
5CL8 is described in the supplied Tung-Sol datasheet as a triode-tetrode for VHF oscillator-mixer service. The redo includes a substantive section-electrical extraction from ratings and characteristic tables.
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
- 9FX
- Socket code
- B9A
- Base pins
- 9
- Nominal heater voltage
- 4.7 V
- Nominal heater current
- 600 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
9FX - Terminal pinout
Electrical assignments shared by every tube using this base designation.
| Terminal | Section | Connection | Evidence |
|---|---|---|---|
| PIN1Base Pin | B | G1 — Control Grid Literal label 2G1; manufacturer confirmation pending | Unverified EIA Base Connections printed p132, 9FX |
| PIN2Base Pin | B | P — Plate (Anode) Literal label 2P; manufacturer confirmation pending | Unverified EIA Base Connections printed p132, 9FX |
| PIN3Base Pin | B | K — Cathode Literal label 2K; manufacturer confirmation pending | Unverified EIA Base Connections printed p132, 9FX |
| PIN4Base Pin | — | H — Heater Literal label H; manufacturer confirmation pending | Unverified EIA Base Connections printed p132, 9FX |
| PIN5Base Pin | — | H — Heater Literal label H; manufacturer confirmation pending | Unverified EIA Base Connections printed p132, 9FX |
| PIN6Base Pin | A | P — Plate (Anode) Literal label 1P; manufacturer confirmation pending | Unverified EIA Base Connections printed p132, 9FX |
| PIN7Base Pin | A | G2 — Screen Grid Literal label 1G2; manufacturer confirmation pending | Unverified EIA Base Connections printed p132, 9FX |
| PIN8Base Pin | A | K — Cathode Literal label 1K; manufacturer confirmation pending | Unverified EIA Base Connections printed p132, 9FX |
| PIN9Base Pin | A | G1 — Control Grid Literal label 1G1; manufacturer confirmation pending | Unverified EIA Base Connections printed p132, 9FX |
Section ratings
2 physical sections, each with unique specifications.
Section 1
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 5000 Ω
- Transconductance
- 0.008 S
- Amplification factor
- 40
- Max plate voltage
- 300 V
- Max plate dissipation
- 2.7 W
- Rectifier max heater-cathode voltage
- 200 V
- Rectifier warm-up time
- 11 s
REDO: section-specific promoted ratings/characteristics populated from supplied datasheet.
Section 2
Tetrode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 100000 Ω
- Transconductance
- 0.0058 S
- Max plate voltage
- 300 V
- Max screen voltage
- 300 V
- Max plate dissipation
- 2.8 W
- Max screen dissipation
- 0.5 W
- Rectifier max heater-cathode voltage
- 200 V
- Rectifier warm-up time
- 11 s
REDO: section-specific promoted ratings/characteristics populated from supplied 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
1966 Tung Sol Electronic Tubes 1 of 4
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristic
Heater/filament voltage
4.7 V
Published rating
Heater/filament current
600 mA
Published rating
Triode transconductance
8000 µS
TriodeSection
Triode amplification factor
40
TriodeSection
Tetrode transconductance
5800 µS
TetrodeSection
Other
Application
VHF oscillator-mixer
TelevisionService
Electrical equivalence
6CL8 except heater ratings
Published statement
Triode plate voltage
125 V
TriodeSection
Triode plate current
15 mA
TriodeSection
Tetrode plate voltage
125 V
TetrodeSection
Tetrode screen voltage
125 V
TetrodeSection
Tetrode plate current
12 mA
TetrodeSection
Tetrode screen current
4 mA
TetrodeSection