Hello all,
I have to build a simple crystal controlled micro audio transmitter.
The range has to be arround 200 -300m and frequency about 110 -120MHz. I've tried to find such a schematic for almost a week - without results. All I found were non crystal transmitters, nothing new :cry:
I have a kit of a PLL device, but it's bigger than I need. I even tried to pay some so called "Pro", but the designs were too complicated....
I know that it can be done with a varactor + crystal, but the "overtone" is not clear to me, so , maybe there is a "RF " guru that may help me.
TIA,
I have to build a simple crystal controlled micro audio transmitter.
The range has to be arround 200 -300m and frequency about 110 -120MHz. I've tried to find such a schematic for almost a week - without results. All I found were non crystal transmitters, nothing new :cry:
I have a kit of a PLL device, but it's bigger than I need. I even tried to pay some so called "Pro", but the designs were too complicated....
I know that it can be done with a varactor + crystal, but the "overtone" is not clear to me, so , maybe there is a "RF " guru that may help me.
TIA,