Make an RF transmitter: classic transistor oscillator or VCO module?
It will take considerable skill to make a transistor oscillator as good as Mini-Circuits can. 

As a bonus, it can be frequency modulated by simply adding a few mv of signal onto the tuning voltage. The "Tuning Sensitivity" spec suggests you get close to the max 75kHz deviation for the FM band with only 10mV. 

Obligatory notice : make sure that whatever you do applies with the rules for transmitting signals on your chosen band in your jurisdiction...