Magnus Danielson wrote: > 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 > > Hej Magnus
If one uses cheap cable with relatively high attenuation at L1 this may not be a problem. However the active antenna may need higher gain to compensate. The question is just how much one way cable attenuation is required? A considerable reduction in this effect can be obtained by making the cable length close to an odd multiple of one-half the signal wavelength (½λ) in the cable. Bruce _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
