On Sun, 28 Jan 2007 13:02:39 -0800, Brooke Clarke <[EMAIL PROTECTED]> wrote:
>Long ago Bob Grove promoted the idea of using 75 Ohm TV coax for ham >antennas at 2 meters and higher frequencies because it had lower loss >than 50 Ohm coax and was much lower in cost. For ham applications the >VSWR due to the coax impedance was much smaller than the inherent match >(mismatch) of the things on either end. yes. I started doing that in the late 70s when a large quantity of CATV hard line fell into my possession. I did some loss measurements on a 500 ft roll and was pleasantly surprised to find the loss much less than a roll of 1/2" 50 ohm hard line that I also had on hand. >From then on I used CATV coax for all my ham activities on 2 meters and above. On 2 meters and 440 I was surprised to find the SWR significantly lower than theory predicted, measured with a Bird wattmeter. I never had the time and curiosity at the same time to investigate so I just tucked that one away in the long term storage area of my brain. John --- John De Armond See my website for my current email address http://www.neon-john.com Cleveland, Occupied TN Don't let your schooling interfere with your education-Mark Twain _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
