Originally Posted by KP44
radios and Amateur Radio
antennas are different and use a ground plane. High Frequency (HF) radios use the minimum wattage required to communicate - but up to 1500 watts to "bounce" off the ionosphere and communicate world-wide.
(very high frequency) radio
is 1 watt or 25 watts for line-of-sight communication. Usually 1 watt is sufficient.
All vertical antennas, regardless of frequency, use a ground plane or more precisely, a counterpoise
There is no minimum “wattage required” to communicate regardless of frequency or mode. The 1500 watts figure is a max allowable transmitter output for ham radio, not related to ionospheric skip and not applicable to marine
As to the OP, he described splicing coax absent the proper connectors. If his description is correct, that is the problem.