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
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