[Milsurplus] MC-385-A

[WA5CAB at cs.com]

It was to allow use use of HS-33/38 with the -A model SCR-274-N receivers 
and early model BC-224 or BC-348, which do not have the 250 ohm tap on the 
audio output transformer.  Will also work with HS-30 and any USN headsets.

In a message dated 08/20/2013 19:52:47 PM Central Daylight Time, 
telegrapher at q.com writes: 
> I found one of these in the bottom of one of my junk boxes.  However, it 
> had an external PL-055 attached to in instead of using the regular jack.  
> Why i don't know but it had a 280 ohm resistor soldered to the tip side of 
> the jack inside.  Also was a note written on the capacitor as i can read it, 
> 28 or 280 ohms input and 8 or 80 out.  Outside of the box says : Headset 
> adapterMC-385-A high to low impedance, for use with Headset HS-33 or HS-38.  
> It doesn't appear that the 280 ohm resistor was standard and the only 
> thing original in there are the PL-055 jack and plug along with the 3 wire 
> capacitor.  Where was this used, what type equipment other than the 
> HS-33/HS-38?
> 
> Larry
> W0OGH

Robert & Susan Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480