Hi guys sorry if this is a question that has been answered before but I could not find any info. I need to know what is the difference between RX and TX crystals? Is one for the receiver and the other for the transmitter? Just wanted to know as I am looking into getting a few different frequencies. Thanks for any help.

You got it in one dude
TX = Transmitter Xtals and RX = Receiver Xtals

Crystals that is still dont know why they dont just put TC and RC

Thanks for your help

another thing Adoika,
The Tx is the Xtal that is the "frequency" (eg. 29.745)
The Rx Xtal may state the same number on it, but quite often will have a higher number (eg. 29.745 will say 30.200)
In the 29 mHz range, the Rx is always 0.455 more than the Tx.
Not sure of 27, 36 or 40 mHz number, but same rule applies.