RE: Radio Frequencies
I didn't say it wouldn't work. I meant you shouldn't do it, most of the time you probably wouldn't notice, esesially with gliders were there is no engine generating any RF noise. so people think it's OK, just because people do this doesn't make it OK, again your not in a place that regulates it so it doesn't matter. The RF harmonic in the Tx circuit are not totally dependent on the Tx crystal, the Cap/inductor resistor ladder circuits as well as oscillators and preamp post amps and the length of the anttena all have some play in it as well. I'm sure someone will buzz in on full radio 101 how it works presentation, the point is it's a tuned system and changing the crystal disrupts that tuning. Todays radio have more and more IC's and SMT components so it does lessen amount of shift off frequency and changing within 3-4 channels still not recommended probably won't be noticed. Definitely don't change between full bands