[ICOM] Older Icoms question

[U Sidarau]

I used to have an IC-730 and obviously I did not have the 24 pin plug. But I
wanted to do RTTY...
If memory serves, the AF Out and Ground pins are next to each other and both
located at one end of the long socket. A DIN plug turned to perfectly fit
the 2 pins. It was quite long ago and I don't remember details. I believe,
it was a 3 pin DIN plug and I had to modify it slightly... I (delicately)
mean, I had to cut it in half or so. Anyway, it worked just fine. 

73,

Vlad VE3IAE

--

-----Original Message-----
From: Icom [mailto:icom-bounces at mailman.qth.net] On Behalf Of John Geiger
Sent: Tuesday, September 20, 2016 3:12 PM
To: ICOM Reflector
Subject: Re: [ICOM] Older Icoms question

Thanks for the additional information. There is an audio out on the acc
connector on the back of the rig, but not sure how easy it would be to find
the 24 pin plug.

73 John AF5CC

On Tue, Sep 20, 2016 at 2:02 PM, Ken Winterling <wa2lbi at gmail.com> wrote:

> John,
>
> I never owned a 720 or 720A, I just repaired them and only used them 
> long enough to verify my repairs with a few QSOs.  Once you get the 
> rig take a look inside, it might be possible to run AF to the mic 
> connector without too much trouble.
>
> A quick look at the schematic seems to indicate that there is a fixed 
> audio level on the main board at P2/J10 pin 8 or at the junction of 
> R127, 1K, and R128, 10K.  This is the input to the audio amp section, 
> prior to the AF gain control.  I don't see a signal level indication 
> so I don't know if it would be high enough for your purposes.  A scope 
> or AC millivolt meter will give you a clue.
>
> Good luck!
>
>
> On Tuesday, September 20, 2016, John Geiger <af5cc2 at gmail.com> wrote:
>
> > Hi Ken,
> >
> > Thanks for the fast answer.  Guess there is no AF out there.  Do you
> still
> > like the 720A?
> >
> > 73 John AF5CC
> >
> > On Tue, Sep 20, 2016 at 12:46 PM, Ken Winterling <wa2lbi at gmail.com>
> wrote:
> >
> > > John,
> > >
> > > According to my IC-720A service manual, there isn't any connection 
> > > to
> > pin 8
> > > of the mic connector.
> > >
> > > Ken
> > > WA2LBI
> > >
> > >
> > > On Tue, Sep 20, 2016 at 1:33 PM, John Geiger <af5cc2 at gmail.com> wrote:
> > >
> > > > On the 1990 and later Icom models the AF output is also found on 
> > > > the
> > mic
> > > > connector, on 8 pin, which is nice for building a simple digital
> modes
> > > > interface.  Is this also true on the older Icoms like the
> 720/730/740?
> > > The
> > > > manual never mentions it, but the wiring for the other pins is 
> > > > the
> > > same.  I
> > > > have an Icom 720A on the way and want to start working on an
> interface
> > > for
> > > > it.
> > > >
> > > > 73 John AF5CC
> > > > ----
> > > > 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/ To support QSL/QTH.net: 
> > > > http://www.qsl.net/donate.html
> > > >
> > > ----
> > > 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/ To support QSL/QTH.net: 
> > > http://www.qsl.net/donate.html
> > >
> > ----
> > 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/ To support QSL/QTH.net: 
> > http://www.qsl.net/donate.html
> >
> ----
> 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/ To support QSL/QTH.net: 
> http://www.qsl.net/donate.html
>
----
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/ To
support QSL/QTH.net: http://www.qsl.net/donate.html