Legalities aside there is an even BIGGER problem in TX swaping crystals...

The TX coils and chokes need to be tuned for your frequency. If this is not done for you and you swap crystals several things happen.

- Your TX puts out far LESS power than it should on the frequency you are trying to use.

- Your TX puts out spikes on other adjacent channels, and you could be responsible for someone else's plane ( and it's expense! ).

- Your RX sees more noise than it would normally.

-

I was flying a plane on 72mhz last year, and I noticed that it took a noticible "hit" when it went by one pilot who was at the other end of the field from me.
I didn't think about it for a while after that day... and I had no further problems.

A couple of months later I was flying another plane on the same frequency I used before... I was bringing it in for a landing, when the same guy walks up to the pits to prepare for takeoff. My plane glitches and crashes at the time he turned his TX.

A couple other club members saw this and they asked me what frequency I was on.

They walked up to him and asked him the same thing. He was supposidly ten channels off from mine...

Someone had the presence of mind to ask him if he had changed the crystal on his TX himself... he said yes, that it was originally on another channel.

They told him that he owed me a new plane.

He left mad and never showed up again. He is no longer a club member too.

The guy still owes me a plane.

Don't be him! You CAN be sued for this!