[Icom] remote control

Tue, 19 Nov 2002 08:07:48 -0800

Brad,

There was an article in CQ Magazine in March 1992 describing a CIV
interface. Far circuits still lists the associated circuit board for a few
dollars in their web site.

Rolly W7DGX

Brad Humphries wrote:

> Hi Dave!  Yes I am using the same software on both machines.  So, all I
> have to do is break those 3 loose and run the 12vdc there?  Ok, this
> will help a lot!  Thanks!
>
> -----Original Message-----
> From: [email protected] [mailto:[email protected]] On
> Behalf Of Dave, AA6YQ
> Sent: Tuesday, November 19, 2002 12:36 AM
> To: [email protected]
> Subject: RE: [Icom] remote control
>
> In the upper-left corner, note the junction of the three modem control
> signals RTS, CTS, and DSR. Replace this junction with a source of +12
> vdc.
> In this configuration, nothing should be connected to the modem control
> signals.
>
> Are you using the same software on your desktop and laptop?
>
>     73,
>
>         Dave, AA6YQ
>
> -----Original Message-----
> From: [email protected] [mailto:[email protected]]On
> Behalf Of Brad Humphries
> Sent: Tuesday, November 19, 2002 0:28 AM
> To: [email protected]
> Subject: RE: [Icom] remote control
>
> Using the interface referenced below, where do you apply the 12vdc?  I
> have built this exact interface and it works great on my desktop, but I
> use a laptop for all the logging and digital ops and can't get it to
> work.
>
> Thanks,
> Brad
> AE4VJ
>
> -----Original Message-----
> From: [email protected] [mailto:[email protected]] On
> Behalf Of Dave, AA6YQ
> Sent: Monday, November 18, 2002 11:56 PM
> To: [email protected]
> Subject: RE: [Icom] remote control
>
> Icom's CI-V bus is indeed a two-conductor affair: data and ground. The
> data
> conductor is therefore bidirectional, implemented as an open-collector
> TTL
> bus. You'll need a bidirectional RS232-to-TTL level converter to allow
> your
> PC to interact with your 775. You can buy such units from Icom
> (expensive)
> or from one of several independent manufacturers, or you can build one
> inexpensively yourself. I'm particularly fond of
> http://www.qsl.net/civ_commander/interface.jpg , having built 3 or 4 of
> these over the years for use with a 706, 735, 756, 775, and 781; if the
> parts don't reside in your junkbox, you'll find them all at Radio Shack
> totaling under $10. A Google search for "CI-V interface" yields a
> multitude
> of off-the-shelf and home-brew options. E-Bay may also be a source.
>
> Connector-wise, you'll need an 1/8 inch male mono phono plug for the
> 775's
> CI-V socket and a female DB9 or DB25 connector for the serial port.
>
> Some homebrew schematics power the level converter from the serial
> port's
> modem control signals. While this works, be sure that the software you
> choose can assert these signals, and don't omit the polarity protection
> diodes; those modem control signals could be a source of negative
> voltage
> after starting your PC. Since you're unlikely to be operating portable
> with
> your 775, I'd suggest bypassing these concerns by powering the level
> converter from a local 12vdc supply.
>
>    73,
>
>         Dave, AA6YQ
>
> -----Original Message-----
> From: [email protected] [mailto:[email protected]]On
> Behalf Of Bill Conkling
> Sent: Monday, November 18, 2002 23:12 PM
> To: [email protected]
> Subject: [Icom] remote control
>
> I just bought a used but clean 735 transceiver.  I am looking to
> interface it with my PC.  Where can I find information on how to do
> this?  It appears to need only a two conductor cable.  But I suspect
> it also requires some sort of electronic interface to accomplish this.
>
> Thanks
>
> Bill  (KG4TFF)
> Wmsbg, VA
>
> ----
> Your Moderator: Dick Flanagan W6OLD, [email protected]
> Icom Users Net: Sundays, 1700Z, 14.315 MHz
> Icom FAQ: http://www.qsl.net/icom/
>
> ----
> Your Moderator: Dick Flanagan W6OLD, [email protected]
> Icom Users Net: Sundays, 1700Z, 14.315 MHz
> Icom FAQ: http://www.qsl.net/icom/
>
> ----
> Your Moderator: Dick Flanagan W6OLD, [email protected]
> Icom Users Net: Sundays, 1700Z, 14.315 MHz
> Icom FAQ: http://www.qsl.net/icom/
>
> ----
> Your Moderator: Dick Flanagan W6OLD, [email protected]
> Icom Users Net: Sundays, 1700Z, 14.315 MHz
> Icom FAQ: http://www.qsl.net/icom/
>
> ----
> Your Moderator: Dick Flanagan W6OLD, [email protected]
> Icom Users Net: Sundays, 1700Z, 14.315 MHz
> Icom FAQ: http://www.qsl.net/icom/