[ICOM] Icom CI-V serial to usb question

[David Ashworth]

Thank you very much Dave.  Been trying to figure this thing out for a while.
I will follow your steps and let you know what I find.  Thank you again,
Dave.

----- Original Message ----- 
From: "Dave Bernstein" <aa6yq at ambersoft.com>
To: "'ICOM Reflector'" <icom at mailman.qth.net>
Sent: Wednesday, June 02, 2004 04:10
Subject: RE: [ICOM] Icom CI-V serial to usb question


> The URL is http://www.qsl.net/g3vgr/civ.html . This circuit derives its
> power from the serial port's modem control signals, specifically pin 4
> (DTR). The first thing to check is that there's +12 VDC (or thereabouts)
> on this pin.
>
> If the USB converter isn't supplying enough power, you can try using pin
> 7 in addition to pin 4 (making sure your software asserts the signal
> RTS). If that's not enough, you can reconfigure the interface to accept
> power from an external source, though that's not very convenient in a
> portable setup. I've found Belkin's USB-to-serial converters to have no
> difficulty in powering my CI-V interface through the modem control
> signals.
>
> I've been using KB7SG's interface design since its 7/92 appearance in
> QST; there's a schematic http://www.qsl.net/civ_commander/interface.jpg
> . I've built 3 or 4 of them over the years for use  with a 706, 735,
> 756, 775, and 781 with no problems.
>
>     73,
>
>          Dave, AA6YQ
>
>
>
> -----Original Message-----
> From: icom-bounces at mailman.qth.net [mailto:icom-bounces at mailman.qth.net]
> On Behalf Of David Ashworth
> Sent: Tuesday, June 01, 2004 23:16
> To: ICOM Reflector
> Subject: [ICOM] Icom CI-V serial to usb question
>
>
> Hi fellows, I noticed the reflector has lots of talk about the CI-V
> interface tonight.  I have a question very close to what a couple of
> people were getting into.  Perhaps you might be able to help me.  I
> built a home made interface with two 2N2222A transistors
> http://wwwg3vgr.co.uk/civ.htm (the site seems to be down from my end
> right now) and it works fine with a 706MKIIG and a HP laptop using com1.
> I get the band/freq info from the Icom on both the TR Log and Writelog
> programs that I use.  I have gotten interested in RTTY and now use com1
> on the laptop with a rigblaster to key the radio for RTTY.  So, here is
> my question:  I have been trying to ADD the freq/band info from the Icom
> to the programs using the above interface with a USB to serial converter
> cable (IOGear GUC232A) and so far, no luck. One end of the home made
> adapter is plugged into the 1/8" jack on the Icom, the other end is a  9
> pin female rs-232. The serial to USB cable is then plugged into the 9
> pin female rs-232 and terminates into an USB connector.  The USB end is
> plugged into the USB jack in the laptop.  I put a breakout box on it and
> can see all of the same signals that I see when it works plugged into
> com1.  I have tested the USB to serial cable with a mini-tower PC and it
> works.  I am beginning to think that it might be something with the
> laptop not putting out enough to drive the converter cable.  Would
> anyone have any
> ideas and maybe point me to another interface that I might build?
> Thanks
> so much for your ideas and help, best regards, Dave, NC6P.
>
>
> ----
> 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
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