Voltage Radio Detector Converter ·Diode-Diode-Pentode
Duplex-diode and RF-pentode combination designed for receiver detection and Class-A radio-frequency amplification.
Duplex-diode and RF-pentode combination tube for detector and Class A RF-amplifier service.
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.
No verified pinout is recorded for this base designation.
3 physical sections, each with unique specifications.
Section 1
No fixed ratings are recorded for this section.
First diode section; no separate electrical values are printed in this compact table.
Section 2
Second diode section; no separate electrical values are printed in this compact table.
Section 3
RF pentode 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.
Plate voltage
250 V
ClassA
Screen-grid voltage
85 V
ClassA
Grid voltage
-2 V
ClassA
Plate current
6.7 mA
ClassA
Screen-grid current
2.3 mA
ClassA
Data set 02
Published operating points and test conditions from this source.
Peak inverse voltage
350 V
Average current
0.8 mA
Diode 1 capacitance
2.15 pF
Diode 2 capacitance
2.2 pF
Heater voltage
6.3 V
Heater current
500 mA
Plate voltage
250 V
Screen voltage
85 V
Grid voltage
-2 V
Plate current
6.7 mA
Screen current
2.5 mA
Transconductance
4100 uS
Plate resistance
1000000 ohm
Screen-grid amplification factor
5.5
Pentode input capacitance
4 pF
Pentode output capacitance
4.6 pF