[ARC5] [Milsurplus] Old surplus catalogs are always fun to look, through

[Charles]

On 11/19/22 12:46, arc5-request at mailman.qth.net wrote:
> That would have likely been an APS-13 (tail end Charlie) , a simple pulsed
> RADAR at 450 MHz, that lit a lamp and buzzer if its signals bounced off
> anything.
>
> There were three equipments that had similar appearance and operated in the
> same band from late WWII- The APS-13 tail warning radar, the SCR-718
> (BC-788) high range pulse altimeter with J-scan CRT display, and the APN-1
> low range FM altimeter.
>
> Scott W7SVJ

I have an I-152 indicator (the J-scan display for the BC-788). Many 
years ago I was going to convert it to a transmitter monitor scope, so I 
removed the 400 Hz power transformer for the CRT, which I've since lost. 
In the space for the transformer and 2X2 & recessed socket, I built a 60 
Hz supply from a Stancor photoflash transformer and a tripler. Now it 
works and will display a pulse once supplied with the appropriate signal 
to generate the circle. I have 400 Hz power now, but way too late. Anyway.

But I don't have a BC-788 to hook it up to. Fair used to have two in 
stock but they wanted $100 plus shipping several years ago, and at least 
one had been significantly cannibalized :( Anyway if I can find one for 
a more reasonable price (and now postage rates would kill any savings), 
it'd be neat to hook up and aim at something the right distance away :)

-Charles, WB3JOK/0