[CQ-Contest] CT-17 Problem

Tom Wagner tfwagner at snet.net
Sat Sep 10 07:07:16 EDT 2005

There are two standard serial cables.  One is a
"straight-through" cable, the other is a "modem
eliminator" cable.  You want the former.

You can use your multimeter to see if you have
continuity on all required pins. A quick google
search yields this nice diagram:


I didn't check for accuracy, but if your cable has
the receive and transmit data reversed, you have
the wrong cable.

I presume that you are using a "real" CT-17, and
that it is powered properly.

Tom Wagner - N1MM
Check out the N1MM Free Contest Logger at:

-----Original Message-----
From: cq-contest-bounces at contesting.com
[mailto:cq-contest-bounces at contesting.com]On Behalf Of MikeR
Sent: Friday, September 09, 2005 8:45 PM
To: ku8e at bellsouth.net
Cc: secc at contesting.com; cq-contest at contesting.com; mrrc at contesting.com
Subject: Re: [CQ-Contest] CT-17 Problem

Jeff -
Is the address set correctly in the software? I don't know what it is
for the 756Pro, the ProII is 64 hex.
There's nothing special about the cable.
73, Mike NF4L

ku8e at bellsouth.net wrote:

>  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
>CQ-Contest mailing list
>CQ-Contest at contesting.com

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