You can try the free demo version of EZNEC:

www.eznec.comA quick model suggests around 7uH should be a good starting point, which, with zero

losses would have an input impedance around 17 ohms.

This coil calculator will help you calculate the physical dimensions:

http://hamwaves.com/antennas/inductance.htmlWith a small diameter coil wound on the fishing rod itself, and depending on your

ground system, you may have enough loss to get a low SWR with no other matching.

If you can keep the loss resistance down to 11 ohms you'd have a 2 : 1 SWR, which

could be matched using a shunt coil across the feedpoint - the exact details will depend

on the Q of your coil and the details of your radial system.