[Milsurplus] sloppy contractor OH work on boatanchors

[Mike Morrow]

>The APN 9 Loran A receivers all had to be modified to read a new pulse
>repetition (PRR) rate (the "S" rate) employed after WW 2. 
>The mod work was done by private contractors and was a real 
>butcher job. ... I saw a few presumably done by a different contractor 
>that had neat stencilled white lettering and a very crisp straight line,
>but these were not nearly as common as the nail polish versions

I was lucky enough to get one of those neatly modified R-65/APN-9 units.  The whole mod appears professionally done.  Got it from John Meshna's warehouse 30 years ago, just as an interesting relic.  LORAN A was still in operation then, but the 400 cps power requirement kept me from firing it up.

When I was stationed on a Royal Netherlands Navy destroyer (HRMS Amsterdam) 33 years ago, an AN/APN-9 was installed at the navigator's work area.   (Although in northern Europe, we used the Decca Navigator system instead of LORAN A).

Mike / KK5F