If you are talking about 2.4ghz systems then the answer is no. On 2.4ghz systems there is a compleet language transmitted which is different with each brand and even with different models from one brand. You need matching receivers....

If you are talking about 27/40/72mhz then thos chips are called crystals and yes they can be changed. Still be aware that some brands -for sure with FM- can use special crystald that do not work with other brands. Also here it is the best to use the right matching receivers and crystals.