VHF Modulator

[riggd]

I have a VHF modulator out of a VCR with a switchable output channel of 0 or 1. I want to modify the output for somewhere between channel 7 and 12. The modulator is based on the Toshiba TA8637BF chip where the data is easily available on the net. Looking at the data I am not sure what parts to change for the higher channels or even if the modulator will work at the higher channel. Any advice is appreciated. Rigg

 

[Nigel Goodwin]

The SAW resonator sets the frequency, it's actually two of them, one for each channel.