"Michael Melland" wrote in message
...
If a cable, any cable ..... for argument sake... say Andrew LDF2-50... has
a
specified loss at.... say 1000 MHz.... of 3.52 dB in 100 ft... is there a
way to calculate what the loss would be in different lengths ? Say for 50
feet ?

The cable above is an example.... but is there a rule for calculating loss
for cables of any kind under 100 feet ? Would loss at 50 feet be exactly
1/2 of that at 1000 feet ?


for a 1:1 swr the loss is a linear function of length. so the loss at 50'
would be 1/2 that at 100' (not 1000' as you typed above!). if the swr is
greater than 1:1 its not so straight forward.

oh, just fair warning... questions like this often attract nit-picky trolls
who will turn this thread into a never ending discussion of why swr isn't,
and how lossy cables change the world... ignore them for your own sanity.