frequency down conversion from 134mhz-174mhz to 34mhz- 7omhz

[vineet dhanotia]

hi,
i want to convert 1.5w 134mhz-174mhz output to 4w 30mhz-70mhz.

pl sugest various methods which can be adopted by me.

 

[surajbarkale]

You need a RF mixer for this. Check out the circuit in tunar of a TV. It is an excellant example of a downconverter. With little modifications you can use it for your frequency range.