a trucker without a CB?
The first time I used it, was in Petrolia on the Pipeline on the ambulance in '75....I could receive everybody, but I had to be real close for anyone to receive me, except for the main office that had a tower...and I got fed up of having the office relay messages for me..so I bought that at a local radio shack ....after cutting a quarter inch off the whip I got from 3 to 1 reading to 2 to 1..
I stopped when I got real close to 1 to 1 and finally got the range I was looking for....
I kept the tool cause it would have cost the company more to bring in a radio man to fix it than the price of the tool..
I don't know what frequency they were running on but this works for all frequencies..