Or an SWR meter....:/ With that much loss, even a dead short
would probably look acceptable...
As far as 213 coax, it *is * a direct bury coax. You can bury it
no problem. Rg-6 is a 75 ohm coax used for TV/Cable.
It will work, but it would be better to use a 50 ohm line, being
you have a 50 ohm rig...Will cause you appx a 1.4 to 1 mismatch,
with is no big deal really...It will reduce your "usable" bandwidth
though...I use 213 on VHF for short runs...Some loss, but not
enough to kill you...None of my coax runs are over 50 feet..MK