This pops up about twice a month on this newsgroup. The cable is more than
a patch cord, it contains electronics in the hood of the DB-25. It plugs
into the packet connector. The electronics is assumed to be level
converters (although it may be a RS232 to audio converter as it plugs into
the packet connector which is expecting to pass and receive packet audio
tones to a TNC).
No one has been able to publish a schematic. They do seem to be hard to
come by -- Europeans tell me that they can't be had at all there.
I bought mine at AES -- (and they ship internationally). I have used it to
program my TM-V7A and my TM-G707A, both with the free software that Kenwood
provides on their web site. It works FB.
>Anyone know if it is possible to make the 4s patch cord used to program the
>radio with your PC. I have not been able to find one, everyone says that
>the cord is on backorder. Does the patch cord plug into the mic jack or the
>packet jack? Can anyone shed some light on this topic. Thanks in advance.