[Milsurplus] FS: ATD Maintenance Manual Reprint

[Hue Miller]

----- Original Message -----
From: <WA5CAB@cs.com>
To: <milsurplus@mailman.qth.net>
Sent: Saturday, November 16, 2002 1:42 PM
Subject: Re: Re: [Milsurplus] FS: ATD Maintenance Manual Reprint


> Hue,
>
> At least two sets that I've seen were configured as you said.  Most of the
> rest had no or at least less than four TU's, so they don't really count.
>
> The preliminary manual does say something about "available on request".
The
> NAVAER specifically says that the transmitter is supplied with 540-1500,
> 1500-3000 and 2x3000-9050.  And then says "Tuning units having frequency
> ranges of 9050-15,800 Kcs and 200-540 Kcs are available."  I'm pretty sure
> that the one that I sent (I think) to Walt H. many years ago included a
> 200-540.

Interesting, too, that the range 200-500 and 500-1500 were deemed more
important than HF above 9 MHz. And, if you judge, for this set alone, that
the 3-9 MHz range was most important, 1.5-3 and  0.5 -1500 next, and
0.2-0.5 less important. Important, as in "commonly used". My take, is that
altho LF / MF was important for DF use, the LF was more difficult to use,
requiring a much longer trail antenna, and radiating less power, so maybe
the range 500-1500 was to be preferred.
Hue