If you visit http://www.rig.org.uk/index.html you will find PIC 16C84  or 16F84
source code for controlling the  PhilipsTSA6057 or TSA 6060 PLL frequency
synthesiser chips.

  Look  under 'Software' for RX2 DIY.ZIP     (NOT the remote control software). 

 These chips work from 30 -200 MHz.

Tom