[Milsurplus] need help

[Morrow, Michael A.]

David Stinson wrote:
JMFLYBOY@aol.com wrote:
=20
> > Our nonprofit org. is restoring a WW I laison aircraft=20
> > which has a AVR-20A and a AVT-15A RCA  radio equipment.
> > We want to replace the vibrator [6V] RCA #18205.

David Stinson wrote:

> Can you tell me if you have the AVA-126 power supply, or
> if you are running from an alternate power supply?

The AVT-15A has its own internal vibrator supply, which was also
intended to supply the AVR-20A.  The AVA-126 was used with transmitters
that did not have an internal supply, like the AVT-112A.

The AVT-15A and AVR-20A made a nice two-box installation.  The AVR-20A
is a pretty clever design, but the AVT-15A is a 6L6 modulating
(horrors!) a 6L6 (a modulated oscillator).  Since a 6L6 was used, it
obviously couldn't even be configured as a electron coupled MO-PA in one
tube, like the 837 was in the one-tube transmitters of the early TBX
sets.

Mike / KK5F


=20