[Milsurplus] R-388

[WA5CAB at cs.com]

Larry,

One of the Changes in the front of the manual addresses the Order Number at 
which the switch replaced the speaker jack, and gives a few details.  My 
R-388/URR (which does have its original nameplate) was made subsequent to that Order 
and also has the switch.

I don't have the MWO, but it applies to the AN/GRC-26A (from the number - TM 
11-264A is the TM for the GRC-26A).  DA PAM 310-4 (11/58) says "Modification 
of radio set AN/GRC-26A to provide facilities for break-in operation".  So your 
receiver must be earlier than the Order mentioned above, and the MWO applies 
(mine doesn't have the MWO stamp).

In a message dated 8/8/2005 4:45:23 PM Central Daylight Time, 
telegrapher at att.net writes: 
> In the 388 manual they show 2 jacks on the front panel.  One for 
> headfones and one for speaker.  My unit does not have this.  It has one 
> jack for headfones and where the 2nd jack was it has a toggle switch 
> labeled "break-in" ON- Off".  On the front panel is labeled "MWO SIG 
> 11-264A-1"  Did that MWO change out the jack for the switch?  Or, is 
> this not really an R-388?  What's the difference between an R-388 and a 
> 51J-3?  Or are they the same radio just different nomenclature depending 
> on who wanted to use them?

73
Robert Downs - Houston
<http://www.wa5cab.com> (Web Store)
MVPA 9480
<wa5cab at cs.com> (Primary email)
<wa5cab at houston.rr.com> (Backup email)