[CQ-Contest] [SECC] CT-17 Problem

Paul Hansen pwhansen at bellsouth.net
Fri Sep 9 10:44:33 EDT 2005

To eliminate the radio as the problem, find another Icom radio and connect
the two remote jacks together. That cable should have 1/8" mono (not stereo)
style audio plugs on both ends. Confirm both radios are in C-IV transceive.
Any button pushed on one radio should report to, and move the other radio.
Push the bottons on both radios to confirm both the serial in and serial out
is working.

The CT-17 is nothing more than a MAX232 in a nice box. If the MAX232 is good
you should see nice square waves on pins 13 and 14. Those are TXD and RXD
respectively. If the MAX232 is not running or the signals on pins 13 and 14
look distorted, it's bad. A new one is cheap. If the red LED lights, the
regulator in the box is running. There are two 1uH chokes that can open up
if the CT-17 was the victim of a lightning strike. There is no special
RS-232 cable required. Any serial cable should work.

Paul W. Hansen, W6XA
Amateur Radio Service
Icom Service Center - Southeast
1140 Watkins Road
Anderson, SC 29625
(864) 222-3539
----- Original Message ----- 
From: <ku8e at bellsouth.net>
To: <cq-contest at contesting.com>
Cc: <secc at contesting.com>; <mrrc at contesting.com>
Sent: Friday, September 09, 2005 9:41 AM
Subject: [SECC] CT-17 Problem

>   I just purchased a used CT-17 CIV converter for my IC756PRO. I can't
seem to get it working.
>   It didn't come with an instruction manual or any of the cables. I
happened to find a .pdf of the
>   manual online.
>     I have checked my cables and the CIV jack on the back of the IC756PRO
and they are OK.
>   From what I understand the CIV (or remote) jack on the 756PRO should
measure between +4 and +5 volts.  When you turn on the CIV transcieve option
from the menu on the radio and turn the VFO the voltage should  drop
somewhat.  I have double checked to make sure the baud rate is set correctly
on both the radio and programs. I have also checked my computer and there
are no conflicts on the serial  port - COM1.
>   I have tried it with CT (for Windows), N1MM and NA and I can't get it to
communicate with any of these
>   programs.
>   Does anyone know if the RS232 cable is wired special ? I used the one
that I have for my TS850S radio control box - just a DB25 - DB9 cable. I am
using a 3.5mm mono  plug from the CT-17 to the CIV jack on the radio.  It
powers up just fine when 12 volts is applied.
> Anyone else ever have these problems ???
> Thanks, Jeff  KU8E
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> SECC at contesting.com
> http://lists.contesting.com/mailman/listinfo/secc

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