Data set 01
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Service
Mixer
IF≈40MHz
SECTION 2
Triode
Other
Service
Oscillator
Voltage Radio Detector Converter ·Pentode-Triode
5X8
Combined triode-pentode used as an oscillator and mixer or frequency converter in television or VHF communications receivers.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- 9AK
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 4.7 V / 600 mA
Description
Miniature type used as combined oscillator and mixer Q/ff. Gf?\N2) crlf Ui^y '"^flUf-; tuDe m television receivers utilizing an intermediate (I/Q^^tW® ' frequency in the order of 40 MHz and in AM/FM re- 0- 6 »» ^0 ceivers. Outlines section, 6B; requires miniature 9-con- "p tact socket. Types 5X8 and 19X8 are identical with 9AK type 6X8A except for heater ratings. 5X8 6X8A 19X8
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
- 9AK
- 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
9AK - Terminal pinout
Electrical assignments shared by every tube using this base designation.
| Terminal | Section | Connection | Evidence |
|---|---|---|---|
| PIN11G3 | A | G3 — Suppressor Grid EIA chart transcription, manufacturer confirmation pending | Unverified EIA Base Connections, printed page 131, 9AK |
| PIN22G1 | B | G1 — Control Grid EIA chart transcription, manufacturer confirmation pending | Unverified EIA Base Connections, printed page 131, 9AK |
| PIN32P | B | P — Plate (Anode) EIA chart transcription, manufacturer confirmation pending | Unverified EIA Base Connections, printed page 131, 9AK |
| PIN4H | — | H — Heater EIA chart transcription, manufacturer confirmation pending | Unverified EIA Base Connections, printed page 131, 9AK |
| PIN5H | — | H — Heater EIA chart transcription, manufacturer confirmation pending | Unverified EIA Base Connections, printed page 131, 9AK |
| PIN6K | A | K — Cathode EIA chart transcription, manufacturer confirmation pending | Unverified EIA Base Connections, printed page 131, 9AK |
| PIN71G1 | A | G1 — Control Grid EIA chart transcription, manufacturer confirmation pending | Unverified EIA Base Connections, printed page 131, 9AK |
| PIN81G2 | A | G2 — Screen Grid EIA chart transcription, manufacturer confirmation pending | Unverified EIA Base Connections, printed page 131, 9AK |
| PIN91P | A | P — Plate (Anode) EIA chart transcription, manufacturer confirmation pending | Unverified EIA Base Connections, printed page 131, 9AK |
Section ratings
2 physical sections, each with unique specifications.
Section 1
Pentode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 750000 Ω
- Transconductance
- 0.0046 S
- Amplification factor
- 40
- Max plate voltage
- 250 V
- Max screen voltage
- 250 V
- Max plate dissipation
- 2 W
- Max screen dissipation
- 0.4 W
Pentode section values mapped from converter-service maximum ratings and average characteristics.
Section 2
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 6900 Ω
- Transconductance
- 0.0058 S
- Amplification factor
- 40
- Max plate voltage
- 250 V
- Max plate dissipation
- 1.5 W
Triode oscillator section values mapped from section-specific ratings and average characteristics.
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
Pentode
Capacitance
Grid-to-plate capacitance maximum
0.06 pF
PentodeSection;WithShield
Input capacitance
4.8 pF
PentodeSection;WithShield
Output capacitance
1.6 pF
PentodeSection;WithShield
Other
Plate voltage
125 V
ClassA;PentodeSection
Screen voltage
125 V
ClassA;PentodeSection
Grid voltage
-1 V
ClassA;PentodeSection
Plate current
9 mA
ClassA;PentodeSection
Screen current
2.2 mA
ClassA;PentodeSection
Characteristic
Transconductance
5500 µS
PentodeSection
Plate resistance
300000 Ω
PentodeSection
Zero-bias transconductance
5700 µS
Eb100V;Ec2=70V
SECTION 2
Triode
Capacitance
Grid-to-plate capacitance
1.5 pF
TriodeSection
Input capacitance
2.4 pF
TriodeSection;WithShield
Output capacitance
1 pF
TriodeSection;WithShield
Other
Plate voltage
125 V
ClassA;TriodeSection
Grid voltage
-1 V
ClassA;TriodeSection
Plate current
12 mA
ClassA;TriodeSection
Characteristic
Transconductance
6500 µS
TriodeSection
Amplification factor
40
TriodeSection
Plate resistance
6000 Ω
TriodeSection
Data set 03
1968 General Electric Co
Published operating points and test conditions from this source.
SECTION 1
Pentode
Characteristic
Conversion Transconductance
2100 uS
Mixer;PentodeConnection
Other
Heater Warm-up Time
11 s
SECTION 2
Triode
Other
Oscillator Power Output
0.5 W
250MHz
Data set 04
1975 RCA RC30
Published operating points and test conditions from this source.
SECTION 2
Triode
Characteristic
Heater Voltage (ac/dc)
18.4 volts
Published value from supplied target entry
Heater Current
0.16 ampere
Published value from supplied target entry
Heater Warm-up Time (Average)
11 seconds
Published value from supplied target entry
Plate Voltage
275 volts
Published value from supplied target entry
Grid No
275
Published value from supplied target entry
Grid-No
2
Published value from supplied target entry
For grid-No
137.5 volts
Published value from supplied target entry
For grid-No
275 volts
Published value from supplied target entry
Grid-No
125 volts
Published value from supplied target entry
Grid-No.l Voltage
1
Published value from supplied target entry
Amplification Factor
40
Published value from supplied target entry
Plate Resistance (Appiox.)
300000 ohms
Published value from supplied target entry
Transconductance
5500 umhos
Published value from supplied target entry
Plate Current
12
Published value from supplied target entry
Heater Voltage
6.3 volts
Published value from supplied target entry
Heater Current
0.41 ampere
Published value from supplied target entry
Capacitance
Grid to Plate
1.6 pF
Published value from supplied target entry
Grid to Cathode and Heater
2.4 pF
Published value from supplied target entry
Plate to Cathode and Heater
1 pF
Published value from supplied target entry
Plate to Cathode, Heater, Grid No
2
Published value from supplied target entry
Pentode Plate to Triode Plate
0.008 pF
Published value from supplied target entry
Heater to Cathode
6.5 pF
Published value from supplied target entry
Plate to All Other Elements (except grid)
3 PF
Published value from supplied target entry
Grid to All Other Elements (except plate)
2.5 PF
Published value from supplied target entry
Plate to Grid
2 PF
Published value from supplied target entry
Plate to All Other Elements (except grid No.l)
3.5 PF
Published value from supplied target entry
Plate to Grid No.l <
6.5 PF
Published value from supplied target entry
Other
Peak Heater-Cathode Voltage ±
150 volts
Published value from supplied target entry