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ID = 28990
United States of America (USA)
Brand: Moorhead Laboratories (Pacific); San Francisco
Tube type:  Triode, vacuum 
Identical to A-P_Transmitter
First year Dec.1920 Saga of the Vacuum Tube, Tyne page 176, 177

Base UV-Base (4 Pins+Bayonet, USA 1914 WE)
Description Priced at $7.50 in Dec 1921 from Atlantic Pacific Radio Supplies Co. 
Text in other languages (may differ)
Information source Saga of the Vacuum Tube, Tyne   page 176, 177
Radio News   Advt Dec 1921 p555

uv~~89.png A-P_Transmitter: Fin Stewart
Fin Stewart

Just Qvigstad
Usage in Models 3= 1921

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):3

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