[Milsurplus] Wanted to Buy: ART-13 Calibration Book

[Mack McCormick]

Mike,

Wow! Thank you for the most detailed explanation. I had no idea the books
weren't mostly standard. I do think that I have a Navy converted version
(has an anchor on the label). It also has the front panel lower Low
Frequency Extended Range switch.

I'm just try to make this rig as complete as possible. You're correct, the
manual works fine for operation.

Thanks again for the outstanding education.

Vy 73,

Mack
W4AX

On Sun, May 27, 2012 at 3:31 AM, Mike Morrow <kk5f at earthlink.net> wrote:

> > I'd like to purchase an original ART-13 calibration book that fits in the
> > tray beneath the transmitter.
>
> If you have a choice (they're more scarce than the transmitters) select one
> for for the specific transmitter you have.
>
> There are cal books for:
>
> 1.  ATC-* with 8Q-1 MCW-CFI unit
> 2.  ATC-* with 8Q-2 MCW-CFI unit
> 3.  T-47/ART-13 (most with 8Q-2)
> 4.  T-47A/ART-13 (8Q-2, and all have a vernier scale above Dial B HF VFO)
> 5.  TCZ-*
>
> I can't find my TCZ manual now, so I don't know if the 8Q-1 cal unit was
> used
> in all versions.
>
> Some of the calibration points shown in bold are different depending on
> if the 8Q-1 or the 8Q-2 is used.
>
> The USAF used the T-47A, which always uses the 8Q-2 and also has a
> vernier scale above HF VFO knob B to aid in more precise dial positioning
> than all other models.  Cal data is given in 1 kHz increments throughout
> the whole frequency range in T-47A (AN/ART-13A) units, while for the other
> versions it is given in 5 or 10 kHz increments.  Thus, the AN/ART-13A book
> is more than twice as thick as the cal book for other versions.
>
> The early AN/ART-13B did not have the "LF Frequency Extension" switch on
> the front that allowed crystal control operation down to 1670 kHz.  The
> CDA-T has 20 MF/HF crystal positions, but they are really ten channels
> in bank A and ten in bank B, in which at any of the ten channel positions
> the A frequency and B frequency must be, IIRC, within three percent.
>
> Any AN/ART-13B could have been built on any of the earlier models, not
> just the T-47A/ART-13.  In fact, most seem to have been made from USN
> ATC models.  The cal book that is appropriate is the cal book for the
> original version.  The best case would be a T-412/ART-13B that was built
> from a USAF T-47A/ART-13.
>
> Other than cal points or the precision of dial settings specified in the
> cal manual, all cal data is the same regardless of the model.  The cal
> book data were not specific to any model or serial number, like the books
> for the BC-221 or the LM frequency meters, even though the cal books may
> themselves be serialized.
>
> Unless one has the cal book for the specific transmitter model, I don't
> see any value of any substitute above just using the cal data that is
> available in any copy of the appropriate operating or maintenance manuals.
>
> 73,
> Mike / KK5F
>
>
>


-- 
73,

Mack de W4AX
http://w4ax.com