You have to watch dBi vs. dB rated antennas. I don't consider the quarter-wave or vertical dipole gain antennas really, but they both show 2 or 3 dB gain over an isotropic radiator. The straight dB (sometimes dBd) rating assumes a dipole or 1/4 wave and rates the gain over that.
Joe Della Barba Coquina -----Original Message----- From: Andy Frame via CnC-List <cnc-list@cnc-list.com> Sent: Tuesday, April 26, 2022 11:10 AM To: cnc-list@cnc-list.com Cc: Andy Frame <svmar...@pm.me> Subject: [EXTERNAL] Stus-List Re: Mast head antenna cable Remember to calculate in the rated gain on the antenna. A simple 3dB gain gives an effective doubling of radiated energy. With sufficient gain, you can overcome much of the feedline loss. On 4/26/2022 11:04 AM, Joe Della Barba via CnC-List wrote: > FYI: > > Loss per 100 feet at 150 MHz and power output for 25 watts input > > RG58 5.4 dB 7.2 watts > > RG8X 4.3 dB 9.2 watts > > RG8 2.4 dB 14.4 watts > > LMR400 1.5 dB 18.1 watts > > Joe Della Barba > > Coquina C&C 35 MK I > > Kent Island MD USA > -- s/v MaryMe 1975 C&C 24 Port Labelle, FL USA Amateur Radio WD4RCC
