[Milsurplus] FS: ATD Maintenance Manual Reprint

[Hue Miller]

----- Original Message -----
From: <WA5CAB@cs.com>
Subject: [Milsurplus] FS: ATD Maintenance Manual Reprint

> Also, the list member who asked me to scan and print the manual pointed
out
> that there was a plug-in tuning unit for the ATD that covered 9050-15,800
KC.
>....I've had and or
> seen several ATD's over the past 40 years and never saw one of these
> plug-ins.  Anyone here have one or ever see one?
> Robert Downs

Robert, i seem to recall the manual reading something like "Not supplied
with standard
equipment but available. I have not seen one either. I suspect the Navy had
no reason
to buy one, as #1 these frequencies at the time were not considered useful
communication
frequencies for medium range aircraft ( unlike PBY, PBY )  #2 the matching
receiver ARB
for the same reason as #1, tuned 195 - 9050 kHz, the standard freq range for
communication,
and #3, my suspicion only, that the way the channels were switched by
switching channel units,
would act real squirrely up around 12+ MHz.

I have seen one of the LF TUs. But the usual configuration on the ATD seems
to be  500-1500,
1500-3000, and 2x 3000-9050 ( my numbers approximate ), doesn't it?
BTW, seems for a transmitter that was "never deployed", a fair number seem
to have survived.
Maybe they were just to weird to convert, and not enuff modern parts inside
to scrap.
Hue Miller