I was browsing the for sale ads on here earlier and have a few questions.

Regarding matching the transmitter with the receiver. If a person buys just the transmitter, and then later finds a receiver on the same channel, is it absolutely necessary to send the tx and rx in to a place like Horizon and have it tuned?

If so, can a local electronics repair place do this sort of work?

Can you use a different brand reciever and transmitter ie: a Futaba tx and a JR receiver both on channel 26? Or is it proprietary stuff and only matched brands will work?