The Thunderbolt book suggests using RG6 (75 ohm) up to some given length and then other cable like RG8if the length is longer. I can't look it up right now. They claim the rg6 is very good because of the double shield. Trimble claims the 75 v. 50 mismatch is trivial.
On Wed, Jan 23, 2013 at 12:41 AM, Hal Murray <hmur...@megapathdsl.net> wrote: > > mspencer12...@yahoo.ca said: >> This URL goes into some of the issues involved in using 75 ohm coax in a gps >> system. I do acknowledge that several GPS manufacturers have promoted the >> use of 75 ohm coax so some of the conclusions might be arguable.. > > If the coax is short, the loss due to mismatch dominates. If the coax is > long, the attenuation per X meters will dominate. > > There should be a crossover length What is it for 50 ohm RG-58 and 75 ohm > RG-6? > > > If you are designing your own antenna, you have the option of making one that > matches 75 ohm rather than 50. > > > > > -- > These are my opinions. I hate spam. > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. -- Chris Albertson Redondo Beach, California _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
