[wa2ise]

I decided to change the channel this CM7000 transmits on to channel 2 (as the crystal I used, 18.432MHz puts it almost dead correct for channel 2) by installing the above modulator in it. The existing modulator in the CM7000 looks to be the crystal-less synthesizer type that has channel 3 or 4 "hard wired" into PLLs, which also produce the 4.5MHz sound carriers as well (which renders changing the master timing crystal of 4MHz not possible, as the sound carrier ends up being wrong). So I disabled it (shorted its output to ground) and cut the F connector center pin solder lug loose and connected it to the blue coax cable running from the new channel 2 modulator (I removed its old F connectors). And I also picked off the baseband mono audio and baseband video that feeds the old modulator to feed to the new one. That's the black shielded cables. The orange wire is switched 5V tapped off the main board.

This new channel 2 output is then fed into a splitter along with another box outputting on channel 4, and the merged signals then feed TV sets. And it looks like a master antenna in a town with a channel 2 and a channel 4. And as soon as I can find another modifyable TV modulator that I'll put on channel 6, then I'll have 3 channels. That's as many as I can do without lower sideband filtering.

Looks like this modulator was made by Panasonic, as I see that [M] logo on the top shield.