[Icom] Help ... need computer interface for IC-751
Tim Kass
[email protected]
Fri, 31 Jan 2003 21:50:56 -0500
Thanks Frank, Ill check that information out, 73 Tim
Timothy Kass
>From: "Frank A. Ellis" <[email protected]>
>Reply-To: [email protected]
>To: [email protected]
>CC: [email protected]
>Subject: Re: [Icom] Help ... need computer interface for IC-751
>Date: Fri, 31 Jan 2003 21:31:06 -0500
>
>Tim,
>
>The earliest version of computer interface ICOM used for the 751 and 751A
>used the optional IC-EX309 parallel interface adapter. This adapter
>connected to the two CI-IV connectors on the rig's Logic Unit board and the
>data output lines come out on a 24-pin connector which is installed on the
>small ACC plate at the rear of the rig. ICOM's external parallel level
>converter unit CT-10 (only a few were ever made) did the TTL to RS-232
>level conversion and then the interface went on to a computer parallel
>port. This was long before the IBM PC (and it's serial port) was in every
>home and hamshack!
>
>This scheme was abandonded quickly, in favor of the serial interface. Your
>rig's manual, being older, was written before the serial interface standard
>was adopted. The next (and current) generation interface uses an optional
>UX-14 CI-IV/CI-V converter. When this option is fitted in the radio, the
>native CI-IV interface is converted to the newer CI-V serial standard
>(which is still used today) and a small 1/8" phone jack is mounted on the
>751's rear panel. This serial signal is TTL and must be converted to RS-232
>level via the ICOM CT-17 (or equivalent, several hams make them and market
>them, or you could roll your own). The UX-14 is rare, but can be
>occasionally found. There is now a clone unit offered by PIEXX
>(www.piexx.com) that performs the interface, plus adds new features such as
>band stacking registers, power up default memories that can be set by the
>user, and a higher communications speed (9600 baud versus 1200 baud in the
>ICOM UX-14). The UX-14 and EX-309 are plug for plug compatible with the
>751/751A so either interface can be used with either rig.
>
>So - you'll need an interface board (UX-14 or PIEXX clone) and a level
>converter (ICOM CT-17 or homebrew) for control via a serial port and the
>commonly available programs that use the serial port interface. You could
>use the old parallel interface EX-309 too. Somewhere around here I have an
>article from 1983 or 1984 showing how to do it with a Commodore, or
>something, using BASIC and a parallel port. I would recommend using the
>serial interface!
>
>Hope this helps.
>
>73, Frank W3UHF
>www.icomclassic.com
>
>
>
>
>
>
>>From: "Tim Kass" <[email protected]>
>>Reply-To: [email protected]
>>To: [email protected]
>>Subject: [Icom] Help ... need computer interface for IC-751
>>Date: Fri, 31 Jan 2003 20:02:54 -0500
>>
>>
>>Have an Icom IC-751 non A model, want to use the MixW program with it for
>>CW,RTTY,PSK, etc....the manual talks about a Db 25 interface for the radio
>>but mentions little else, I noticed that the update model has a C-IV or
>>C-V interface...anyone know if I can install a RS-232 level connector to
>>the back or similar mod to work with this program and my laptop?? thanks
>>in advance Tim K8WBL
>>
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>
>
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>----
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>Icom Users Net: Sundays, 1700Z, 14.315 MHz
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