I've seen that you're right, Thunderbolt is originally supplied with 75ft of 75 ohm RG-59 cable, as indicated in the manual... So I've the inverse problem: the GPS antennas we have in the roof both have 50ohm cable :) So... would be good to change the impedance at the Thunderbolt antenna port from 75 to 50 by means of some impedance converter? (of course, not altering the DC supply to the antenna).
Regards, Javier, EA1CRB Magnus Danielson escribió: > Hi fellow time-nuts, > > For those of you that isn't aware of it, using 75 Ohm antenna cables rather > than 50 Ohm cables is a bad move, as the antenna cable itself will create a > multi-path system. This article elaborate on reflections i cables: > > http://tycho.usno.navy.mil/ptti/1998/Vol 30_39.pdf > > Nothing new, but needs to be said, especially with Thunderbolts getting more > popular, as the manual clearly recommends 75 Ohm cable as I recall it. Do not > listen to that. > > Cheers, > Magnus > > _______________________________________________ > 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. > > -- ------------------------------------------------------------------------ Javier Herrero EMAIL: [EMAIL PROTECTED] HV Sistemas S.L. PHONE: +34 949 336 806 Los Charcones, 17A FAX: +34 949 336 792 19170 El Casar - Guadalajara - Spain WEB: http://www.hvsistemas.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.
