[ARC5] Nomenclature Taxonomy - AN/ART-13B

[Mike Morrow]

Jay wrote:

> At one time, I had a T-412. It had the CDA-T, the interlock switch,
> the low frequency extend switch and the later CFI unit.

> The nomenclature tag was a thin aluminum strip with T-412 stamped
> on it, painted black with white filled alpha numerics that fit over
> the center of the original tag which if I remember correctly 
> indicated the unit to originaly be an ATC.

That agrees with something I wrote this morning:

> ...sometimes one can find T-412/ART-13B units that are modifications
> of USN ATC or T-47 units that had been upgraded to have the same
> characteristics as the T-47A.

It sounds like you got one of those.  That's lucky and good.  Sometimes
you find T-412s with less extensive upgrades of the unit on which it
was built.  The VFO dial B vernier scale seems to be the mod most likely
to be omitted on those old USN upgrades.  If it has that, it'll probably
have everything else.

I'd like to find out if the USAF the only customer for all those T-412
units, including those using USN transmitters that had not been upgraded
to T-47A status.

I also wonder if most of the 1952-era early AN/ART-13B units got converted
to T-412/ART-13B units.  My bet would say yes.  That should have been easy.
The really hard part, the non-trivial CDA-T installation, was already done.

(But you got to hate those cheesy cheap T-412 nomenclature strips.)

Mike / KK5F