"Jeff" wrote in message
. com...

"Andy" wrote in message
...
I want to measure and cut some coax for 14.200 MHz. It is to be connected
to my Cushcraft MA5B
I have cut off a 100 feet of RG-213 coax and have put a PL-259 on one
end.
I have a T connector connected to the analyse with a 50 Ohm dummy load on
one side of the T and the 100 feet of coax on the other side of the T.
I then go into SWR mode on the Analyser and sweep, the nearest dip it
gives is at 13.105 MHz. I expected it to be nearer to 14 MHz. Would this
be about right?

Before I start cutting bits off the coax I wanted to make sure that this
is correct or is there is a better way?

How crucial is the length of coax in the first place?

73 Andy

Since the MA5B instructions say that the feeder length is not important,
why do you need to cut the feeder to a particular length??

Jeff


with velocity factor of .66 for generic rg-213 i get 12.988MHz being 2
wavelengths... but why do you care?

here is how to calculate the right length, no fancy measurement equipment
needed.
http://www.qsl.net/w4sat/howlong.htm