Here is a link to a TV transmitter project: **broken link removed**
To operate on channel 15 you will need to change a couple of Ls and Cs ..
Regards,
IanP
Tune a TV receiver to an unused channel between 2 and 6. The TV must have an indoor antenna connected directly to it; an outdoor antenna or cable won't work. Make sure both potentiometers are in midposition and apply power to the
Transmitter. Adjust L4 with a nonmetallic tool until the TV screen goes blank. Then fine-adjust L4 for the "most-blank" picture.