hi Harry,
if you need manuals for the radio in PDF
http://www.n6wk.com/kenwood/you can build your own cable if you want,
or there is a guy on ebay selling them.
the 9 pin connectors are available.
if you are not using the external VFO you will need
to verify the 9 pin plug is inserted at the rear of
the radio, otherwise it will not pass the 9v to the
vfo circuit.
If it is missing you can jumper pins
8 and 9 at the socket. Details on page 10 of manual.
join other kenwood ts-5xx and 8xx hybrid fans
http://groups.yahoo.com/group/TS-520_820_530_830/73 james