"jimbo" wrote in message
oups.com...
I am building a new house. I need two coax runs inside the house for
two uses. First, for 2 meter, 440 MHz dual band. Second for 2-30 MHz
HF. I am considering using RG213/U for both runs. I know this coax is
suitable for 440 MHz on runs less than 100 feet. Would there be any
problems for the 2 meter or HF using this coax? Or are there any
suggestions for this project?

Thanks, jimbo


It sort of depends on how much loss is acceptable to you. 9913, for example,
will have about 50% of the loss that 213 gives you at VHF/UHF frequencies.
Remember, that the worse the mismatch (SWR) the higher the loss -- the
tables you see assume a 1:1 SWR, so real world losses are always higher than
what the tables show.

To directly answer your question -- if you are happy with 213 for 440, you
will be happy with it at 144 since the losses will be lower at a lower
frequency.

Not that it is likely to be relevant, but I use 9914 BuryFlex here since to
make my wife happy, I run the coax underground. It should be pointed out
that I don't have an antenna for anything above 6m.

Good luck

Paul AB0SI