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ID = 28068
Brand: Common type Worldwide tube/semicond.
Developer: National Union Radio Corp.; Orange (NJ) 
Tube type:  Transmitting Triode, air cooled 
Identical to 4C27 = E1232 = REL7 = 8026 = CV92
Similar Tubes
Normally replaceable-slightly different:
  CV1256 ; CV199
First Source (s)
21.Oct.1946 : Electron Tube Registration List 530
Successor Tubes 4C29  

Filament Vf 6 Volts / If 6.5 Ampere / Half indirect

<600MHz, Pa <150W. Micropup shape, external copper anode with brass radiator. Two 4C27s gave up to 150KW pulse output at 200MHz in grounded-plate circuit. Used in the transmitters of SCR-602A and of SCR-636A.
Multiple marking as CV92, 10E/CV92, 4C27 and REL7.
During WWII several manufacturers built tubes interchangeable with the British CV92. These tubes came with multiple markings, British, Canadian and US. RMA code 4C27 was registered to National Union after the war and also manufactured by Central Electronics Mfrs. Inc.

Literature 15 éve Standard Radio, Ungarn   
Tube Lore (I)   
-- Collector info (Sammler)
4C27: O.F.
Otto Frosinn

4C27: Manufacturer's Literature
Emilio Ciardiello


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