[Milsurplus] GF-11

[WA5CAB at cs.com]

Once more, into the breech.

The common audio plugs in service from 19 uhmmm to about 1949 were PL-54 
(black barrel stubby high impedance bale-out), PL-354 (red barrel stubby low 
impedance bale-out), PL-55 (black barrel general audio use) and PL-68 (microphone 
and LS-3 and whatever the field-coil predecessor to the LS-3 was).  The Navy 
had a similar run with both five-digit and NAF numbers.  

The red band around Navy nomenclatured 7/32" diamater PL-68 equivalents has 
nothing to do with this.  It was because of a change in Tip/Ring assignments, 
nothing to do with impedance.  Early production of RS-38's had the PTT switch 
on the ring instead of the tip.  You should check this before attempting to use 
an RS-38 with plug without the red band, regardless of what the nomenclature 
on the plug is.

Post-war, the Navy type numbers and NAF numbers were dropped and the PL- 
numbers all changed to PJ-0 numbers.  And a color indicator letter added to some.  
PL-54 and PL-540 (I never figure out what the difference was) became PJ-054B. 
 PL-354 became PJ-054R.  PL-55 became PJ-055B.  PL-68 became PJ-068.  And the 
bale-out female cable connector JK-26 became JJ-026.

So if it says PL- or JK-, it was made before about 1949 or it's a postwar 
copy and not military at all (these are mostly Japanese copies and very crudely 
made - Fair had a bunch of their RS-38's once and I had the misfortune to buy 
some).  If it says PJ-0 or JJ-0 it's definitely postwar.  -30-

In a message dated 2/14/2008 11:48:15 PM Central Standard Time, 
arc5 at ix.netcom.com writes: 
> >Nope.  It has a PJ-068 plug.  As I explained in excruciating detail last 
> >year, that makes it definitely post-war, ...
> 
> Robert, I must have missed that.
> Many WWII sets use this configuration of plug;
> what's the correct nomenclature for a WWII or earlier plug
> of this type?

Robert Downs - Houston
<http://www.wa5cab.com> (Web Store)
MVPA 9480
<wa5cab at cs.com> (Primary email)
<wa5cab at comcast.net> (Backup email)
   
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailman.qth.net/pipermail/milsurplus/attachments/20080215/70604db5/attachment.htm