PROJECTS: An upcoming project under development: 250 Watt 1kW PEP for ourselves or maybe for other radio stations who need a good broadcast transmitter What is the difference between a 'Ham Transmitter' and a 'Broadcast Transmitter' ? Mainly operation and FAN noise :-D.. Harmonic filter, a modul inside the 19" 'DIPLEX cabinet'. Why a DIPLEX filter? For preventing intermodulation in the PA-stage Only a draft version.