[Milsurplus] Low B+ receiver operation

[Tom Norris]

Not only *did* they work well, but my BC-1206 and R-392 *still*
work pretty well. heehee.

In the R-392, there are only a few conventional high voltage tubes.
The crystal oscillators and low level audio are 6AJ5's, there are a
few 12AU7, and half of them in diode mode. The rest of the tubes
are designed for 28 volt service, the majority of them being 26A6,
with a 26D7 as the audio output, 26C6's as mixers, 26D6 as the
VFO/Mixer. Later models had 26FZ6's as the RF amps.

The Marine Corps R-808 used similar low voltage tubes, so
I've been told, though the radio is nearly as heavy as a T-195.
I shudder to think what the matching GRC-14 transmitter weighs
if the receiver is 130 pounds or so...

73

Not NU4G

Mike / KK5F wrote --
>Most of all those BC-1206 and BC-1333 type LF beacon and 75 mc marker beacon
>receivers, and the receiver section of the Collins 18S HF RT, and the
>R-392/URR, and others, used 28 vdc B+, on conventional HV tubes, except for
>the occasional 28D7.  They must have worked well in that application.
>
>73,
>Mike / KK5F