HF band conditons: https://www.qrz.com/
Transmitter for short wave band (HF) broadcasting: DDS/mosfet driver + 4CX3000A Eimac in final stage, class A/B modulator.
Antenna for short wave band broadcasting:
dipole: half horizontal & half diagonal (‘the half lazy doublet’)
For broadcasting by skywave* to western Europe : *https://en.wikipedia.org/wiki/Skywave
Audio control system for AM broadcasting:
Audio-processor: BW Broadcast DSPX – AM
AM broadcast audioprocessor, the soul of the station sound.
Accurate audio control on negative & possitive modulation peaks .
Mike Radio engineers are frequently experimenting to optimize broadcast (audio) quality!