[R-390] R390A Feedpoint

[Todd, KA1KAQ]

On Mon, Sep 30, 2013 at 12:44 PM, Jim Haynes <jhhaynes at earthlink.net> wrote:

> Some years ago in a surplus store in Silicon Valley I picked up a few
> devices meant for use with the IBM token-ring network scheme.  Had the
> two-pin connector on one end, a short piece of twinax leading to a
> transformer and then to a modular-type telephone plug.  Someone had
> suggested these as a good way to get into the R-390A.
>

That might've been me, Jim, as a source of TwinAx connectors. I came into a
bunch of these at a previous site where I worked, originally used with the
IBM AS-400 system. Ended up with a couple dozen for thinking of it just a
tad too late. When I asked the appropriate person, he said it was too bad I
hadn't asked a week earlier as they had a full box of new connectors with
the necessary tool(s) to assemble them on cables. I don't know that the
cable w/phone adapter is the best route to attach an aerial, but the
connectors sure work fine. Missed the mother lode but at least got enough
for my receivers, CU-286 coupler, and a few spares for future needs.

It's definitely worth checking with the computer scrappers, though the
AS-400s are ancient technology now for the most part. I don't know of any
other system that used them.

de Todd/'Boomer'  KA1KAQ/4