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The maximum range I need is about 114 miles or so. (btw, I forgot to add Crestline, CA, to the list of transmit cities, but that would only be once or maybe twice a year, twice a day for a few days. Same thing for Tulare, CA. Mileage before these parentheses do not count Crestline or Tulare.) No matter where I am receiving or transmitting, the signal basically does not need to go south of Chula Vista, east of Alpine, Julian, or Banning, north of San Bernardino or Burbank, or west of Santa Monica.
Also, something I forgot to specify in the original message. Chances are I would not be there to turn the transmitter on and hook it up, so someone else would need to do it. I would basically want to set it up so that all they have to do is plug the mic into the TX, plug the TX into the wall, if necessary extend the antenna or prop it up against the wall, and turn it on. (would it be better if I set up 2 TX’s – one to be an STL from inside the building to outside, with the 2nd one being the main TX to my receiving location?)
Also, how much power output is safe / unsafe for people that might be within a few inches or a few feet of the transmitter at various frequencies?
One thing I noticed is that below 9 kHz is not allocated. I would think I could get by on something that would fit in that band. Since it’s not practical to put a half-wave vertical radiator at 9kHz inside a building, would a 10kW transmitter into a 2.5 meter antenna get me enough range (because ground losses are so slow to happen), or would it be too unsafe (even for the very low frequency – is it true that higher F/S’s are safer at lower frequencies for near-field human exposure?) for people to be close by? Or are there any other radio options I should look at?