[ICOM] Radio Shack 20-049 Programming Cable

[jpk5lad at cox.net]

Hi Gary --
I couldn't agree with you more but that's the way mine was set up.  It certainly didn't make any sense to me either.  I removed about a 1/2" piece of outer covering to gain access to the wires and used phono needle probes to get to the wires inside.
(Gosh, I wonder how many people now-a-days actually know what a phono needle really is?)

Once I saw how mine was wired I knew I was out out luck using it as a CI-V interface device.

Perhaps I had a cable constructed by someone anxious to go on their coffee break, or saki break.......... or some kind of break.

Jim - K5LAD


---- Gary <n6lrv at cox.net> wrote: 
> Jim,
> Your schematic is a bit odd. Did you actually cut open your cable to come up with the
> conductor colors and the shield connection? Connecting the shield to pin 2 (data
> receive) of the serial connector is very unusual. Usually the shield would be
> connected to pin 5 (ground). I rung out mine without cutting the molded cable open and
> found that the cable appears to be straight through with only data transmit (serial
> pin 3) passing all the way through to the phone plug along with serial pin 5 (ground).
> As shown in your drawing there appear to be no flow control jumpers on the serial
> side. I don't see how this could be used for any Icom application at this time.
> Gary
> 
> jpk5lad at cox.net wrote:
> 
> > Mac - K2GKK/5 suggested I upload the 20-249 schematic to my web site so here 'tis:
> >
> > http://www.hayseed.net/~jpk5lad/download/Radio%20Shack%2020-049%20cable.JPG
> >  or if it splits the URL try:
> >
> > http://tinyurl.com/3xg5zo
> >
> > 73,
> > Jim - K5LAD
> > > --
> > > ===========================
> > > http://www.hayseed.net/~jpk5lad/
> >
> > > ----- Original Message -----
> > > From: <jpk5lad at cox.net>
> > > To: "ICOM Reflector" <icom at mailman.qth.net>
> > > Sent: Friday, June 01, 2007 6:57 PM
> > > Subject: [ICOM] Radio Shack 20-049 Programming Cable
> > >
> > >
> > > This cable, 20-049, is for some of their scanners and I've not been able to
> > > use it for any CI-V applications.  Several weeks ago I "wrung out" the
> > > schematic of the 20-049 and I've offered it via private email to several
> > > members on the reflector but I haven't heard back from any of them.  I
> > > thought this might be helpful but evidently nobody wants or needs it.
> > > Anyway, I do have a schematic of only the RS 20-049 cable if somebody does
> > > need it.
> > >
> > > 73,
> > > Jim - K5LAD
> > >
> > > --
> > > ===========================
> > > http://www.hayseed.net/~jpk5lad/
> > >
> >
> > ----
> > Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net
> > Icom Users Net: Sundays, 1700Z, 14.316 MHz
> > Icom FAQ: http://www.qsl.net/icom/
> 
> ----
> Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net
> Icom Users Net: Sundays, 1700Z, 14.316 MHz
> Icom FAQ: http://www.qsl.net/icom/

--
===========================
http://www.hayseed.net/~jpk5lad/