help detune fm radio(88-108mhz) into vhf fm(108 - 175mhz)

[deepak007]

hello

could some one give a circuit to convert standard fm receiver(88-108mhz) to receive a vhf fm band signals in the range of (108-175mhz).please help me

 

[IanP]

Re: help detune fm radio(88-108mhz) into vhf fm(108 - 175m

One option is to add preamplifier/mixer, based on a dual-gate MOSFET, and a VCO ..
Depending on the frequency range of the VCO, you will be able to receive almost "anything" you like ..
Here are examples of pre-amplifier(BF990) and VCO(BB149):
https://hem.passagen.se/communication/mxtest.html

Regards,
IanP