Hello Peter,

Does anyone know where there is a good site on the web for info on Shunt fed
towers and the like?

I'm sure you'll find something in the archives at the BE site:

http://www.broadcast.net/

Use the drop-down menu.

Also consider joining one of their mailing lists. Full of experienced
engineers who I'm sure can point you to other published work.

Who is Station X AM?
--
Philip de Cadenet G4ZOW
Transmitters 'R' Us
http://www.transmittersrus.com