[Milsurplus] 51J-2

[Grif]

The R-388 is essentially the same as the 51J-3. The R-390 is a very
different receiver. I had a 51J-2 for many years that I had rescued from the
junkyard and restored with the help of the manuals from Collins.
Unfortunately I no longer have the references and I don't remember that much
about it. One difference was that the R-388 and 51J-3 had 3 Collins
mechanical filters (0.5, 3.1, and 6.0 KHz), perhaps as an option. The 51J-2
had a crystal filter. They were otherwise very similar. Great receivers, and
much better at band scanning than the R-390, as one didn't have to drag a
mechanical counter along as one tuned. Also much lighter in weight. They
were essentially general coverage (0.5 - 30.5 MHz) versions of the Collins
75A receivers.

Grif, KF4JG

----- Original Message ----- 
From: "J. Forster" <jfor at quik.com>
To: <telegrapher at att.net>
Cc: <Boatanchors at mailman.qth.net>; <milsurplus at mailman.qth.net>
Sent: Sunday, April 10, 2005 7:48 PM
Subject: Re: [Milsurplus] 51J-2


> I know essentially nothing about the Collins 51 stuff, but I believe some
of it
> is similar to the R-388 through R-390 stuff. If this is the case, those
manuals
> have just been added to the Trackpads site as PW protected .pdfs. PWs
available
> free upon request: (see instructions on site)
>
> http://www.trackpads.net/webs/wireless-set-no19/index.htm
>
> -John