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

[scottjohnson1 at cox.net]

Charles-
I may have a good BC-788 (Actually I have I-152s and antennae as well.)
Next time I am at the airport, I will look for one.

-----Original Message-----
From: arc5-bounces at mailman.qth.net <arc5-bounces at mailman.qth.net> On Behalf
Of Charles via ARC5
Sent: Saturday, November 19, 2022 12:02 PM
To: arc5 at mailman.qth.net
Subject: Re: [ARC5] [Milsurplus] Old surplus catalogs are always fun to
look, through


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

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