Data set 01
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 3
Pentode
Other
Plate voltage
250 V
ClassA
Screen voltage
110 V
ClassA
Characteristic
Plate current
10 mA
ClassA
Screen current
3.5 mA
ClassA
Voltage Pentode or Tetrode (with diode) ·Diode-Diode-Pentode
5BW8
Double-diode pentode designed for television detector and amplifier service.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 3
- Base
- 9HK
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 4.7 V / 600 mA
Description
5BW8 is described in the supplied Tung-Sol datasheet as a double-diode pentode for television detector/amplifier 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
- 9HK
- 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
9HK - Terminal pinout
Electrical assignments shared by every tube using this base designation.
| Terminal | Section | Connection | Evidence |
|---|---|---|---|
| PIN1Base Pin | B | P — Plate (Anode) Literal label 2P2; manufacturer confirmation pending | Unverified EIA Base Connections printed p132, 9HK |
| PIN2Base Pin | B | K — Cathode Literal label 2K; manufacturer confirmation pending | Unverified EIA Base Connections printed p132, 9HK |
| PIN3Base Pin | B | P — Plate (Anode) Literal label 2P1; manufacturer confirmation pending | Unverified EIA Base Connections printed p132, 9HK |
| PIN4Base Pin | — | H — Heater Literal label H; manufacturer confirmation pending | Unverified EIA Base Connections printed p132, 9HK |
| PIN5Base Pin | — | H — Heater Literal label H; manufacturer confirmation pending | Unverified EIA Base Connections printed p132, 9HK |
| PIN6Base Pin | A | G1 — Control Grid Literal label 1G1; manufacturer confirmation pending | Unverified EIA Base Connections printed p132, 9HK |
| PIN7Base Pin | A | G3 — Suppressor GridGroup 9HK7 Literal label 1G3; manufacturer confirmation pending | Unverified EIA Base Connections printed p132, 9HK |
| PIN7Base Pin | A | K — CathodeGroup 9HK7 Literal label 1K; manufacturer confirmation pending | Unverified EIA Base Connections printed p132, 9HK |
| PIN7Base Pin | — | IS — Internal ScreenGroup 9HK7 Literal label IS; manufacturer confirmation pending | Unverified EIA Base Connections printed p132, 9HK |
| PIN8Base Pin | A | G2 — Screen Grid Literal label 1G2; manufacturer confirmation pending | Unverified EIA Base Connections printed p132, 9HK |
| PIN9Base Pin | A | P — Plate (Anode) Literal label 1P; manufacturer confirmation pending | Unverified EIA Base Connections printed p132, 9HK |
Section ratings
3 physical sections, each with unique specifications.
Section 1
Diode
X-ray radiationInterelectrode capacitances
- Max cathode current
- 5 mA
- Rectifier max heater-cathode voltage
- 200 V
- Rectifier warm-up time
- 11 s
Referenced ratings not printed in this source; not inferred.
Section 2
Diode
X-ray radiationInterelectrode capacitances
- Max cathode current
- 10 mA
Referenced ratings not printed in this source; not inferred.
Section 3
Pentode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 250000 Ω
- Transconductance
- 0.0052 S
- Max plate voltage
- 330 V
- Max screen voltage
- 330 V
- Max plate dissipation
- 3 W
- Max screen dissipation
- 0.55 W
- Rectifier max heater-cathode voltage
- 200 V
- Rectifier warm-up time
- 11 s
Referenced ratings not printed in this source; not inferred.
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
Diode
Characteristic
Heater/filament voltage
4.7 V
Published rating
Heater/filament current
600 mA
Published rating
Pentode plate resistance
250000 ohm
PentodeSection
Pentode transconductance
5200 µS
PentodeSection
Capacitance
Diode 1 plate-to-cathode capacitance
1.3 pF
DiodeSection
Diode 2 plate-to-cathode capacitance
1.2 pF
DiodeSection
Other
Maximum screen supply voltage
330 V
PentodeSection
Pentode plate voltage
250 V
PentodeSection
Pentode screen voltage
110 V
PentodeSection
Pentode plate current
10 mA
PentodeSection
Pentode screen current
3.5 mA
PentodeSection
Average diode current
20 mA
EachDiode At5VDC
Data set 03
1968 General Electric Co
Published operating points and test conditions from this source.
SECTION 1
Diode
Characteristic
Heater Warmup Time
11 s
Data set 04
1971 RCA HB3 Binder 4 of 7
Published operating points and test conditions from this source.
SECTION 1
Diode
Other
Peak inverse voltage
330 V
EachDiode
Peak diode current
60 mA
EachDiode
Average diode current
10 mA
EachDiode
Heater/filament voltage
4.7 V
DerivativeSheet
Heater/filament current
600 mA
DerivativeSheet
Heater warm-up time
11 s
ControlledWarmup
Capacitance
Diode plate-to-cathode capacitance
2.5 pF
EachDiode
SECTION 2
Diode
Other
Peak inverse voltage
330 V
EachDiode
Peak diode current
60 mA
EachDiode
Average diode current
10 mA
EachDiode
Capacitance
Diode plate-to-cathode capacitance
2.5 pF
EachDiode
SECTION 3
Pentode
Other
Plate voltage
250 V
Pentode;ClassA
Screen voltage
150 V
Pentode;ClassA
Plate current
10 mA
Pentode;ClassA
Screen current
3 mA
Pentode;ClassA
Characteristic
Plate resistance
500000 ohm
Pentode
Transconductance
6000 uS
Pentode
Capacitance
Grid-to-plate capacitance
0.01 pF
Pentode
Input capacitance
6 pF
Pentode
Output capacitance
3.5 pF
Pentode