Voltage - Dual Triode (similar high frequency) ·Triode-Triode
Medium-mu twin triode designed for cascode VHF tuner amplification below about 300 MHz and for push-pull cathode-drive RF amplifier service.
Medium-mu twin triode for cascode VHF tuner amplifiers and push-pull cathode-drive RF amplifiers. Electrical ratings, characteristics, and capacitances were interpreted from the supplied RCA manual excerpt where reproduced; reference-only entries were not supplemented from outside sources.
Small-button Noval 9-contact
General specifications
Properties common to every published source and operating point.
Electrical assignments shared by every tube using this base designation.
| Terminal | Section | Connection | Evidence |
|---|---|---|---|
| PIN12P | B | P — Plate (Anode) Numbered source electrode preserved; manufacturer verification pending | Unverified EIA Base Connections, printed page 131, 9AJ |
| PIN22G1 | B | G1 — Control Grid Source label preserved; pending confirmation | Unverified EIA Base Connections, printed page 131, 9AJ |
| PIN32K | B | K — Cathode Numbered source electrode preserved; manufacturer verification pending | Unverified EIA Base Connections, printed page 131, 9AJ |
| PIN4H | — | H — Heater Numbered source electrode preserved; manufacturer verification pending | Unverified EIA Base Connections, printed page 131, 9AJ |
| PIN5H | — | H — Heater Numbered source electrode preserved; manufacturer verification pending | Unverified EIA Base Connections, printed page 131, 9AJ |
| PIN61P | A | P — Plate (Anode) Numbered source electrode preserved; manufacturer verification pending | Unverified EIA Base Connections, printed page 131, 9AJ |
| PIN71G1 | A | G1 — Control Grid Source label preserved; pending confirmation | Unverified EIA Base Connections, printed page 131, 9AJ |
| PIN81K | A | K — Cathode Numbered source electrode preserved; manufacturer verification pending | Unverified EIA Base Connections, printed page 131, 9AJ |
| PIN9IS | A | IS — Internal Screen Numbered source electrode preserved; manufacturer verification pending | Unverified EIA Base Connections, printed page 131, 9AJ |
2 physical sections, each with unique specifications.
Section 1
Referenced ratings not printed in this source; not inferred.
Section 2
Second physical triode section; electrically identical twin section.
Source-dependent data
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.
Data set 01
Published operating points and test conditions from this source.
Heater/filament voltage
4.7 V
Published rating
Heater/filament current
600 mA
Published rating
Application
Cascode RF amplifier below approximately 300 MHz
CascodeRF
Grid-to-plate capacitance
1.15 pF
Section1
Input capacitance
2.85 pF
Section1
Data set 02
Published operating points and test conditions from this source.
Heater Warmup Time
11 s
Data set 03
Published operating points and test conditions from this source.
Plate voltage
150 V
ClassA;EachSection
Cathode bias resistor
56 ohm
ClassA;EachSection
Plate current
18 mA
ClassA;EachSection
Maximum plate voltage
300 V
EachSection
Maximum plate dissipation
2.7 W
EachSection
Heater/filament voltage
4.7 V
DerivativeSheet
Heater/filament current
600 mA
DerivativeSheet
Plate resistance
4600 ohm
EachSection
Transconductance
9300 uS
EachSection
Amplification factor
40
EachSection
Grid-to-plate capacitance
1.8 pF
EachSection
Input capacitance
3 pF
EachSection
Output capacitance
1 pF
EachSection
Data set 04
Published operating points and test conditions from this source.
Plate supply voltage
150 V
ClassA
Cathode bias resistor
56 ohm
ClassA
Plate current
15 mA
ClassA
Grid-to-plate capacitance
1.8 pF
Section1
Grid-to-plate capacitance
1.8 pF
Section2