[SiriusHardware]

Attached, the transmitter section from a relatively recent all mode 27/28 MHz transceiver - although the transmitter uses 2 x IRF520 in parallel to produce ~30W the bias arrangement for each FET is quite clear to see. The links J3 / J4 at the bottom are used to disable one output FET by turning off its bias while the bias for the other is being set.