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ID = 39067
Tube type:  Transmitting Triode, air cooled   VHF 
Identical to 4C28
Predecessor Tubes CV92   4C27  

Base Wires
Was used by Radar
Filament Vf 6 Volts / If 6.5 Ampere / Half indirect

Micropup pulse rated power triode. 8KV max anode voltage, 2A peak anode current; gain 22; 150W anode dissipation with forced air cooling.
Intended for application in the VHF range in ground and airborne transmitters of the SHORAN precision navigation system developed by RCA itself, including the AN/APN-3 airborne interrogator/responsor and two ground beacons AN/CPN-2.
Registered by RCA in December 1943, it was similar to 8026/4C27 without the radiator guard ring. Withdrawn by RCA in December 1945, it was later manufactured by Central Sales and Mfg. Corp., Denville, NJ, USA.

Similar to 4C27 without the shielding ring.

Information source -- Original-techn. papers.   Electronics, November 1954, pg. 278
-- Original-techn. papers.   RCA papers, Radar Beacons, MIT vol. 3
  4C28: Manufacturer's Literature
Emilio Ciardiello
4C28: Private collection
Emilio Ciardiello

More ...
4C28: Manufacturer's Literature
Emilio Ciardiello

4C28: Manufacturer's Literature
Emilio Ciardiello

More ...

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