[Milsurplus] C-405A/A vs. C-740/ART-13

[Michael Tauson]

Hi, Folks,

On 9/19/07, Mike Morrow <kk5f at earthlink.net> wrote:

> Using the C-131 and R-26 with the T-47 is (IMHO) a typical USN kludge-job
> arising from the USN not having a receiver matching the characteristics of the T-
> 47/ART-13 until the AN/ARR-15 arrived (but even that receiver provided no
> LF/MF beacon band coverage).

Not quite so.  The Navy used the ATC - T-47/ART-13 with the ARB in a
typical installation which, while it didn't have the full coverage the
transmitter did, was adequate to their purposes.  Further, the ARB was
cockpit tuneable which the BC-348 wasn't.  What the C-131-equipped
R-26 did offer was the ability to autotune the receiver with the
transmitter, a function that was expanded with similarly equipped
R-27s.

These two systems went into TBMs and SB2Cs for certain and possibly
into other aircraft.

> The USAAF AN/ARC-8 used the AN/ARR-11 (BC-348), which very well
> matched the associated T-47A/ART-13,

So did the Navy later on from acquiring USAAF aircraft.  Rather than
swap out the receivers, they kept using them with a few modifications
like an SO-239 in place of the antenna post.  These were used
concurrent with the ARR-15(A).

> except for lack of receiver remote control capability.

The Navy found that a valuable attribute, especially in smaller
aircraft like the TBM & SB2C.  In the meantime, the larger aircraft
were flying with GO & GP transmitters with RU receivers (among
others.)  This, in turn, makes me wonder if the RU was ever paired
with the ATC.

> The USAAF/USAF and the USN marched to slightly different drum beats in the
> same time interval.

They still do!

Best regards,

Michael, WH7HG