Rodney

I can not determine whether c/f is intentionally trolling for comments by using bad or uneducated statements or if he is really as uniformed as his statements appear. Regardless, in the USA we (the hobbiest) is a secondary user of these frequencies and there are many commercial paying users of the frequencies sandwiched in between each of our assigned frequencies. Any time you change out a crystal in a unit not designed for it you can cause interferance to these users even though you can still get your job done. This could cause serious damage or even loss of life to these other users if your transmitter platters into their assigned frequencies. Since you do not know if you need an X cut or Y cut crystal in your transmitter and may use the wrong one, this alone can cause problems. Also, all crystals have a tolerance, they are mechanically ground quartz and usually need padding with inductance or capacitance to be exactly on frequency. That is why you must have the proper tools and training to adjust them when you change crystals. Neither is inexpensive, may exceed 4 figure values. All we need is a few accidents to happen to the paying users of these frequencies sandwiched in between ours for us to loose all our privledges so please obey the law, our very future depends on it.