Get an ATTiny85 Devboard (or use mine) https://oshpark.com/shared_projects/ZDUBhs9S And an AVR Programmer

Check out a copy of avr_vhf from here: https://github.com/cnlohr/avr_vhf

Plug two wires into PB3 and PB4 of your AVR, PB3 should be shorter than PB4. I've typically made them about 2 feet long. I don't know enough about RF to know the correct length for them, maybe 614mm? The other one I made about 9 inches shorter.

Turn on an analog TV set to channel 3. If you don't see static, it's unlikely you'll be able to do this project.

Program your AVR, then change the OSCCAL value until you find the correct frequency for broadcast on your particular AVR. All AVRs have different clocks.

You now have an awful VHF Broadcast AVR Multimeter/Oscilloscope