Ahhh HF.
In the SA I couldnt get a setup to work with a ship 30 miles away, unless I used all concoctions of homemade inverted V dipoles, yet could hear truckers in Illinois.
At the risk of attracting more flack regarding my working practices, I'm also reminded of the time before CB legalisation. Up around 27Mhz the CB lounge lizards tried to attract a new 'seat cover' (woman). The RAF had kindly equipped us with a 1Kw HF TX in case the balloon went up. One man on the Rx id'd the CBers, shouting the frequency through into the TX hall. Entering the numbers into the synth, we'd hit them with a 1Kw burst with a 1Khz audio tone. They we're frequency hopping like mad, whilst we disrupted thier evenings entertainment. What fun.
There have been some studies carried out into remediating the upper atmosphere using LF in the event of such HF blackouts - caused by the upper atmosphere becoming non reflective due to particle charging.
Last edited by AR1; 16th June 2007 at 17:32.