[ARC5] That two pin connector RU and 183

[Jack Antonio]

That little two pin threaded connector has
a number of designations and usages.

Bur first, going back to the SCR-183.  The
cable to the antenna relay uses a PL-77, two
of these if using the TM-A(*)-172.  This is a
"banana plug" style of connector typical of
those sets.

Now on the RU/GF.  The antenna relay cable
uses a Navy Type 77. However this is *not* the
same as the Army PL-77.  The Navy 77 is the
two pin threaded connector. Whether the similar
designations is a coincidence or not, who knows?

The test meter uses a connector which is physically
the same as the Navy Type 77, but has one pin marked with
a plus sign, this goes by the ARC part number of 3146.  I have not found 
any Navy Type designation for this connector. In Army usage, on
the early SCR-274N installations(with the I-71 tuning meter), it is 
known as the PL-157.

Now to the VHF AN/ARC-5.  This same 3146 connector is used to
connect to the C-42 and C-43 control boxes with an optional
sidetone injection cable, from the receiver rack. In the parts
list it is listed as a part of the CD-905 cable, and uses the
Army PL-157 part number.

Talk about arcane trivia.....

One observation on the test meter.  Although the manual describes
the use of the meter in direction finding applications, the meter
just doesn't seem rugged enough for mounting in an aircraft, at least
without some form of shock absorbing.

Jack Antonio WA7DIA/4