More RF ?????'s

[zachtheterrible]

Hi everyone, got ANOTHER rf question (i know this is getting annoying ). Neway, I'm building another transmitter. This isn't exactly precise, but this example will do. When I put a 2 pf cap into the parallel LC circuit, I can hear my voice crystal clear on one part of the dial. when I put in a 1 pf cap, i get a bunch of crackly stuff wherever I turn the dial. I'm trying to find my base frequency without an oscilliscope. Also, how much stronger is the base frequency than the first harmonic? Like twice as much? thanx

 

[Nigel Goodwin]

Also, how much stronger is the base frequency than the first harmonic? Like twice as much? thanx

Much more than that, if it's a decent sinewave (as it should be) the harmonic content should be very low.

 

[samcheetah]

harmonics are just integral multiples of the fundamental frequency. it could be anything, 2 or 10. it depends on the type of the circuit. u should try to make a perfect sine wave and try to keep harmonics down, although that is not 100% possible