Mixer Frequency and local ocilator

dear all
i want to make a mixer frequency for down converter 435 Mhz to 10.7 Mhz? and a local ocillator to generate freuquency 440 Mhz..
Thanks

Riski Andami Nafa

Why not use tv tuner fed to 10.7 MHz if stage with a mixer stage having 35 MHz osc. I once made 45-850MHz reciever using tv tuner and fm radio reciever with local osc frequency modified. tv tuner if output frequency is around 46MHz.

your question is not clear. RF=435M, LO=440M, So IF=5M.
If your IF=10.7M, so LO=445.7M or LO=424.3M.