That same frequency band is used for military tactical ground, satellite and ground to air voice and data transmissions,
Damn Wolf what have you been up to that the Gubment is trying to get you ????
Steel mills often have electric arc furnaces...really, really noisy for shortwave radio users. {snip} Without knowing, I'd guess that your line of sight link runs at a higher frequency that would only be bothered occasionally.
Yeppers they use electric arc furnaces , DC electric arc furnaces , VERRRRRRRRY Powerfull , they have to be carefull not to blow the bottom out of the furnace , NO SHIT !!! The carbon electrode is about 3+ feet accross !!!
The only time we have interference ( and I have tested this , with a radio link to the Melt shop ) is when they are "JUKEING " the furnace ( putting the POWER ( KVA's !!! ) ) to the furnace .