Greetings,
Let's just hope you don't have to go far, two tin cans and a string will have less loss/per/100feet. P III, .412 has nearly 3 dB loss per 100/feet. That loss was determined when the .412 was new. You will be right on the money if you figure three dB signal loss per one hundred feet of cable at sixty-eight degrees farenheit<sp.
Petergunn
