[time-nuts] "Better" gps antennas than a Symmetricom 58532A

Hal Murray hmurray at megapathdsl.net
Wed Jan 23 08:41:55 UTC 2013


mspencer12345 at 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.






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