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

[Mike Morrow]

Larry wrote:

>...you could also wire in Control panel C-405/A.

The C-405A/A is for variants of the USAAF AN/ARC-8.  The C-131/AR and associated remote controls are US Navy, and thus unrelated to the C-405.  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).  The USAAF AN/ARC-8 used the AN/ARR-11 (BC-348), which very well matched the associated T-47A/ART-13, except for lack of receiver remote control capability.

>Another oddity i saw is that in TM 11-692B-2/ AN 16-30art13-3 they talk 
>about and show a C-405A control head.  Nothing about the C-740.

Nothing too odd there.  The C-405/A is USAAF/USAF, while the C-740/ART-13 is USN.  The C-740 is a modern-style six-inch backlighted plasic-face front panel, while the C-405 is an earlier type of all-metal, no backlight, panel.  The C-740 uses a connector plug identical to that used on the original C-87/ART-13, while the C-405 uses a terminal strip.

>In TO 08-30ART13-5 they show the C-740 and nothing on the C-405 although
>they look identical to me.

They are significantly different mechanically, as noted above.  The C-405 is part of the USAF AN/ARC-8.  The C-740/ART-13 and the C-733A/ARR-15A are part of the USN AN/ARC-25 combo of the AN/ART-13 and AN/ARR-15A. 

>Didn't verify wiring but both are designated as Pilots control panel.
>Both TO's are dated about the same time frame 1953 and 1954.

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

Mike / KK5F