Data set 01
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Heater voltage
4.7 V
Heater current
600 mA
SECTION 2
Pentode
Other
Heater voltage
4.7 V
Heater current
600 mA
Voltage Triode Pentode ·Pentode-Triode
5CR8
Triode-pentode for television intermediate-frequency amplifier service.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- 9DA
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 4.7 V / 600 mA
Description
5CR8 is described in the supplied Tung-Sol datasheet as a triode-pentode for television IF 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
- 9DA
- 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
9DA - Terminal pinout
Electrical assignments shared by every tube using this base designation.
| Terminal | Section | Connection | Evidence |
|---|---|---|---|
| PIN12P | B | P — Plate (Anode) Chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 131, 9DA |
| PIN22G1 | B | G1 — Control Grid Chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 131, 9DA |
| PIN32K | B | K — Cathode Chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 131, 9DA |
| PIN4H | — | H — Heater Chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 131, 9DA |
| PIN5H | — | H — Heater Chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 131, 9DA |
| PIN61P | A | P — Plate (Anode) Chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 131, 9DA |
| PIN71G2 | A | G2 — Screen Grid Chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 131, 9DA |
| PIN81G1 | A | G1 — Control Grid Chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 131, 9DA |
| PIN91G3 | A | G3 — Suppressor GridGroup 9DA9 Chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 131, 9DA |
| PIN9IS | A | IS — Internal ScreenGroup 9DA9 Chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 131, 9DA |
| PIN9K | A | K — CathodeGroup 9DA9 Chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 131, 9DA |
Section ratings
2 physical sections, each with unique specifications.
Section 1
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 5500 Ω
- Transconductance
- 0.004 S
- Amplification factor
- 22
- Max plate voltage
- 330 V
- Max plate dissipation
- 2.75 W
REDO: section-specific promoted ratings/characteristics populated from supplied datasheet.
Section 2
Pentode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 300000 Ω
- Transconductance
- 0.0077 S
- Max plate voltage
- 330 V
- Max screen voltage
- 330 V
- Max plate dissipation
- 2.3 W
- Max screen dissipation
- 0.55 W
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 amplification factor
22
TriodeSection
Triode transconductance
4000 µS
TriodeSection
Pentode transconductance
7700 µS
PentodeSection
Other
Application
Television IF amplifier
PentodeSection
Electrical equivalence
6CR8 except heater ratings
Published statement
Triode plate voltage
125 V
TriodeSection
Triode plate current
12 mA
TriodeSection
Pentode plate voltage
125 V
PentodeSection
Pentode screen voltage
125 V
PentodeSection
Pentode plate current
13 mA
PentodeSection
Pentode screen current
3 mA
PentodeSection