To TRANSMIT: 
Many transmitter kits are available for 23cm,13cm and 3cm band. Often a PLL or Cristal oszillator is not necessary for ATV, since bandwith is more than 12 Mhz. Output power of 0,5Watt can easily be pushed to 20 Watts using a PA-module from mobile phones. Wellknown supliers in Europe are: 

RSE     GRAF    Koeditz    KUHNE 
 

Often you may want to switch on your television or videorecorder automatically, when there is activity on the local amateur  television  repeater . The following cicuit allowes you to detect the video signal by its significant sync-signal  (15,625 kc in  European PAL/SECAM)