[Milsurplus] 28d7 tube

[Al Klase]

Yes, it's used in the R-392.  Dual beam-power tube.  11 watts of heater
power for 200mW of audio output, but that's what happens when you run
only 28 volts on the plates.  They run quite hot, and chew themselves
up.  They're pretty reasonable from AES.

Merry Christmas,
Al

Rob Flory wrote:
> Good morning and happy Christmas,
>
> I just came across a new tube, the 28d7 used in the Navy MBF VHF transceiver.
>
> Anybody know other rigs that use it?  Maybe R-392?
>
> Rob
>
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-- 
Al Klase - N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/