In theory, it should have been possible for the Hams to modulate the their transmissions, to write an expletive on the tracking screen of the Russian radar. In

In theory, it should have been possible for the Hams to modulate the their transmissions, to write an expletive on the tracking screen of the Russian radar. In practise, it probably would have been too big a challenge with 1980's home based technology, as an HF transmitter that could accurately generate arbitrary waveforms was bleeding edge tech. Nice to dream about though. I used to work in the Jindalee OTHR facility back in the woodpecker days. I've memories of sitting in the control room, and being given a tour of the airwaves by one of the senior techs, who was also a ham. The tour included listening on on the various HF radars that we could find, including the woodpecker, discussing each system as we went. By the nature of the project, a lot of the technical people had an interest in ham radio, so they looked out for the ham bands. The tech who gave me the tour used to occasionally have a bit of fun by plugging his ham rig into the main transmitter (lots of power, with beamforming). The other cool bit of technology was the "frequency management system", which was a mini HF radar, used to map the ionosphere in real time. It was fascinating to watch the dynamics of the various ionospheric layers on the screens.