9 Controllers Accepts incoming logic and applies and outgoing logic Logic = Audio, VoltageCan be as simple as a switching transistorThe controllers of today come with timers, ider’s, and some formOf remote control via DTMF.This is true of most home-brew controllers also.You wont find many features in the aforementioned style controllerBUT the new controllers like
16 Audio Pre-emphasized or emphasized Or discriminator VS speaker Brick low and high pass filteringFlat VS dynamic rangesDelayForwarding the audio to the controller or voter
17 HysteresisAudio from the RX to comparator where converted into a numericvalue then forwarded to Hysteresis module for switching then ontoThe controller and out to transmitter.
18 Duplexers BpBr circuit One side pass the high frequency While notching the lowOther side passing the lowFrequency while notching the lowWP 641WP 639
19 Any power supply that will handle the load Astron RM 50 M, RM 35 M, RM 20 MAny power supply that will handle the load
20 Antennas Hustler G6, G7, HX6-14448 DB Products DB224E Diamond X510 and othersComet GP9 and othersAny antenna will work, look out for those that have multiplecouplings, Brass fittings with Caesar screws. These need to besoldered over After tuning as they will produce snap, crackle, popin the signal as well as add potential de-cense.