[Milsurplus] Command set, CCT46104

[W7QHO at aol.com]

In a message dated 10/23/06 9:33:52 AM, WA5CAB at cs.com writes:


> The parts list in NAVAER 08-5Q-4 does not list the rated output transformer
> impedance (nor did I find it anywhere in the text although I didn't spend a 
> lot
> of time looking).  But it does give the winding data.  Says primary is 4000
> turns #40 AWG and secondary is 500 turns #32 AWG.  Primary tapped at 2000
> turns.  In any case, the 2/42 Final manual does not show a tap on the 
> secondary. 
> 

OK, 4000 turn primary and 500 turn secondary gives an 8:1 turns ratio 
transformer.   
AN 16-30AEC5-2 gives the same turns ratio for the ARC-5 series receivers and 
goes on to list 600 ohm headsets for use with these.   Notes that several of 
these headsets may be connected to the same output.

Interesting to note, though, that the SCR-274-N receivers appear to use a 3:1 
transformer to drive low Z (600 ohm?) headsets.

Dennis D. W7QHO
Glendale, CA