All 35meg receivers work on the principle of mixing a local oscillator signal (controlled by the receiver's Xtal) with the RF signal. The output of the mixing is a intermediate frequecny (IF) signal that is the difference between the frequencies of the two signals, and therefore a much lower frequency signal and easier to tune precisely. It is this signal which is amplified and decoded. In a dual conversion reciever this mixing is done twice, once with the RF signal and again with the IF signal using an internal Xtal. So by converting the signal twice the selectivity is increased. This all happens at the receiver and has no impact on the TX, so a TX will work with a single or dual conversion receiver.