[Milsurplus] ATC-1 Calibration Book Needed

[Mike Morrow]

Bill wrote:

> I know this is a long shot, but I am bringing up a NIB ATC-1 (ART-13) in a
> Radio Operators Position "Display and Operating Position".
>
> I am missing the Calibration Book for the ATC-1.  The ATC-1 book is thinner
> than the later ART-13 books that got ticker with the better PTO resolution
> that came later.

The calibration books for the USN versions (ATC, ATC-1, T-47/ART-13) of the
Collins 17H-2 are *all* thin.  They are all identical except for the CFI
calibration points indicated in the cal book.  The early two-tube 8Q-1 
MCW/CFI unit produced some different cal frequencies compared to the
later three-tube 8Q-2 MCW/CFI unit, so some of those points will be
at variance in a cal book for an 8Q-1 compared to a cal book for an 8Q-2.
The actual frequency cal data is still identical, though.

To have any chance of getting the correct cal book, one must specify
if the transmitter has the 8Q-1 or the 8Q-2 in place.

It is likely that all units designated T-47/ART-13 have the 8Q-2 unit,
even units that are just ATC or ATC-1 units with the T-47/ART-13 applied
with paint.

The only difference between the ATC and the ATC-1 is the ATC was made by
Collins, and the ATC-1 was made by Zenith Radio.  The same cal book should
apply as long as the 8Q-1 or 8Q-2 issue is resolved.

The USAAF T-47A/ART-13 was made by Stewart-Warner, and it will have the
vernier scale above VFO dial B that allows use of cal data at 1 kHz
intervals.  Cal books for that model are the thick books.  Those were
usually attached by short chain to the stowage tray under the T-47A,
but that doesn't seem to have prevented almost all from disappearing.

> Does anyone out there have a good condition ATC Calibration Book that they
> would part with under the "Right Circumstances"....??

These cal books are much harder to find than are the transmitters.  And they
are almost impossible to reproduce.

Mike / KK5F