Diode (NOT rectifier) ·Diode
Special high-vacuum control diode designed for voltage-stabilizing circuits and applications exploiting the dependence of cathode emission on filament voltage.
Special high-vacuum rectifier diode intended for control-diode service in tube voltage-stabilizing circuits and other applications exploiting filament-voltage dependence of cathode emission.
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.
1 physical section, each with unique specifications.
Section 1
Published values promoted where clearly readable; identical repeated sections compressed when applicable.
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 voltage
4 V
Published nominal value or midpoint of published range
Heater current
3.5 A
Published nominal value or midpoint of published range
Data set 02
Published operating points and test conditions from this source.
Maximum heater voltage
1.4 V
Maximum heater current
3.5 A
Maximum anode current
0.7 mA
Maximum cathode emission current
2 mA