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Re: [SD-User] SD and IC7400 compatiblity with CT-17

Subject: Re: [SD-User] SD and IC7400 compatiblity with CT-17
From: Paul O'Kane <>
Date: Wed, 29 Jul 2020 12:12:40 +0100
List-post: <>
The USB-17 cable referred to serves only for rig control.  It's a perfectly good option for rig control but will not faciltate CW keying on the IC7400, because that rig does not support a text to CW feature.

CW keying is entirely separate from rig control - you can have either or both.  For keying, the options are SD's internal keyer, or an external keyer such as WinKey or the microHAM CW Keyer.  With SD's internal keyer, smooth CW cannot be guaranteed (but it may be OK) because of interruptions from Windows.  To use SD's internal  keyer, refer to CW KEYING on page 6 of the manual SD.PDF - it requires a USB to serial converter (for PCs with USB outputs) and a simple 1-transisitor/resistor level converter as described.

WinKeyer USB is, by far, the simplest keying solution- it is supported by all logging programs.  The UK distributor is Kanga UK but they seem to be closed at present.  Here's the USA site - or

I don't recommend the microHAM CW keyer because it uses a separate control program for setting parameters, and it does not recognise some of SD's relevant setup commands. However, it has the big advantage of supporting both rig-control and CW keying in a single unit -

Paul EI5DI

On 29/07/2020 11:09, Roger Wheeler via SD-User wrote:
Hello Paul,Please could you advise me here. Will SD key my IC7400 via a USB CT-17 cable. 
I have used SD for many years now  as a logger on SSB contests . I won one in 
2015!. Now I want to use SD during the RSGB CC80m CW contests . I have seen on eBay 
a USB CT-17 cable, as sold by G0OYQ . He sells all type of CI leads etc. I asked him the 
above question but he suggests that I ask your good self.Many thanks ,Roger G3MGW

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