You will probably need to remove power from the receiver while transmitting. These superregenerative receivers put out a lot of noise which can affect nearby transmitters. I've used them as translator/repeaters, receiving on one frequency and sending on another, allowing control of things like ceiling fans from an RF capable Pronto but, unless the transmitter and receiver were separated by several feet (or the receiver powered down), it would not work. I was using just a transmitter and receiver with no PIC so did not have the option of powering down the receiver.