[ARC5] RE: [Milsurplus] Very Interesting

[Morrow, Michael A.]

William wrote:

> I did come across a manual in the AN/ARW series, and apparently
> one of the numbers uses a modified BC-454 or BC-455 as the front
> end. Some non-ham mods were made, so if you find a BC-454-BM or
> BC-455-BM, you've got it. 

I had, prior to this thread, never noticed that the unit that the eBay
MT-622 rack accomodates, the RT-122/APW-11, had this small SCR-274-N
transmitter design connection.  I just compared my RT-122 to the dimensions
of a SCR-274 transmitter rack FT-226.  The connector on the RT-122 appears
to be practically the same as the connector on a BC-457 transmitter, except
rotated by 180 degrees.  Otherwise, it would mate exactly with the connector
on the FT-226 except for two orientation pins on the back of the RT-122
which prevent full insertion into the FT-226.  The RT-122 is exactly the
same length and width as the BC-457, and its front panel mount retaining
pins match the brackets on the FT-226.

I don't know what the RT-122/APW-11 was supposed to do.  I guessed that it
was likely some sort of airborne radar beacon.  I seem to remember it being
on the list of equipment carried on mid-1950s B-57 Canberra bombers.  My
unit is marked USAF property and has a depot stamp date of January 1959 on
it.  They show up at hamfests and ebay and you can't hardly give them away,
even though they have 17 tubes in them.

Mike / KK5F