Beg, borrow, buy a TDR and look at it that way.
Most coax will last many more years than people believe.
Problems occur from moisture ingress, but, if trimmed when necessary,
will do just fine.
My rule of thumb is: If the shield is shiny, it's OK.
I have 100's of feet of it ready to put into use this Fall/Winter season.
Now all I need to do is get the towers/antennas up!
Quoting Pete Smith <firstname.lastname@example.org>:
> What is a good working rule for the life expectancy of decent quality
> RG-213? I have a lot of it around here, and it is difficult to measure
> loss in situ. Jackets still seem fine, but wonder if it's time to
> replace before winter.
> 73, Pete N4ZR
> The World Contest Station Database, updated daily at www.conteststations.com
> The Reverse Beacon Network at http://reversebeacon.net, blog at
> spots at telnet.reversebeacon.net, port 7000
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