My TrueTime gps rcvr uses rg-59 as well. Don Robert Atkinson > Hi Ken, > This is correct. Some other documents explain the rationale. Basically > for long runs the loss caused by the mismatch is less than > the higher loss per foot of 50R coax of a similar size. Even better than > RG59 is the high performance cable used for cable TV and satellite > installations. This is cheap and low loss at 1.5GHz. This also also > explains the F connector on the Thunderbolt. It would also be intersting > to measure the actual impedance of some GPS receivers and antennas. > > Robert G8RPI. > > > ________________________________ > From: Ken Kubick <kenkub...@hotmail.com> > To: Time Nuts <time-nuts@febo.com> > Sent: Monday, 30 April 2012, 6:58 > Subject: [time-nuts] Trimble recommends RG-59 Antenna Cable. > > > Hi Time-Nuts guys, I was reading the Trimble Thunderbolt manual section > 2.1.3 (Antenna Cable). Trimble recommends using RG-59 cable which is 75 > ohm coax. Is this a typo or is this correct? I thought that the > Trimble Thunderbolt would use a 50 ohm cable and antenna. > > Thankyou > > Ken Kubick > > kenkub...@hotmail.com > _______________________________________________ > 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. > _______________________________________________ > 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. > >
-- "Neither the voice of authority nor the weight of reason and argument are as significant as experiment, for thence comes quiet to the mind." R. Bacon "If you don't know what it is, don't poke it." Ghost in the Shell Dr. Don Latham AJ7LL Six Mile Systems LLP 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 www.lightningforensics.com www.sixmilesystems.com _______________________________________________ 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.