[Elecraft] KAT-500 interface cable question

[Don Wilhelm]

The wiring for the Icom AH4 Interface is detailed on page 8 of the 
KAT500 manual.  Pin 4 of the Molex connector is connected to the shield 
(shell) of the T-R-S plug.

I don't know how the MFJ cable is wired.

BTW - there are no hyphens in Elecraft product designations, so it is 
the "KAT500" and not the "KAT-500".

73,
Don W3FPR

On 11/2/2018 10:45 AM, Clint Talmadge wrote:
> New guy here with a question. I am about to get a KAT-500 to mate to my
> IC-7300. In searching for the Molex connector I need to make an interface
> cable for the radio to the tuner, I came across the MFJ-5124I cable which
> MFJ sells to mate their 99* series auto-tuners to Icom radios. The
> connectors on the tuner end are the same as used on the KAT-500. The wiring
> is the same with one addition. Where there is no ground connection from the
> sleeve of the 3.5MM stereo plug specified in the KAT-500 manual, the MFJ
> cable has the sleeve connected to the ground pin of the Icom connector.
> Seeing the that the sleeve of the 3.5mm stereo connector on the KAT-500 is
> chassis grounded anyway I think I can use the MFJ cable to interface my
> KAT-500 to my IC-7300.  Does anyone see the flaw in my thinking? (about the
> cable, not the radio) de W5CPT