[Milsurplus] ID'ing a unit

[William Donzelli]

> Good question.  One answer might be that this is for use at a location 
> presumably with 60Hz power (like a command post with a generator), to 
> key a TBW at a remote location to avoid DF or for the TBW operator to 
> accommodate more than one remote location.  No indication of how the 
> keying is accomplished.  The note below is the extent of the writeup in 
> the NAVSHIPS.  Sez nothing about RTTY.

These units, sometimes called "Land Line Control Units", were fairly 
common for the big stuff found at shore staions. I have a small pile, 
although not of this CNR type, made for various sets like TAB, TBA, TBK, 
TBM. Maybe the Navy needed a few for TBWs, as the "normal" LL Control 
Units are completely overengineered and weigh about as much as a TBW.

William Donzelli
aw288@osfn.org