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HA1

Information - Help 
ID = 14276
       
Country:
Great Britain (UK)
Brand: MO Valve Co. Ltd.; GB
Tube type:  Triode, vacuum 
Identical to HA1 = NR50 = CV1171 = A40_Mazda

Base Acorn 5 pin 5AA
Filament Vf 4 Volts / If 0.25 Ampere / Indirect / Parallel, (AC/DC)
Description

Manufacturers data give heater current=0.25A. Gm=1.7mA/V at Va=180 (max), Ia=4.5mA and -Vg=6.5.

 
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   
 
osram_ha1.jpg
HA1: High Frequency Thermionic Tubes, A.F. Harvey
Achim Dassow

 
ha1_sock.png
HA1: Tabu Röhren-Codex, 1948
Anonymous 15 Collector

 
ha1_data.png
HA1: MARCONI RECEIVING VALVES, LONDON, 1938
Jose Casas-Avalos


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