been meaning to put this out there for a while,since I have had a few conversations about this w/various members.
first pics,cables from L-R w/associated N male connectors.
RG8/213 LMR400 type, 1/2Inch superflex, 1/2inch hard line also known as Heliax, 7/8inch hard line.
[ MyGMRS STAFF EDIT: 3 Photos no longer available from linked source.]
now lets talk about the losses in Db and how much power that is.
Cable type loss at 100Mc 400Mc
RG8/213 2.0dB/100' 4.7dB/100'
LMR400 1.2 2.5
Hardline type 150Mc 450Mc
1/2" superflex 1.3dB/100' 2.3dB/100'
LMR600 1.0 1.7
1/2" Heliax 0.85 1.5
7/8" Heliax 0.44 0.8
1-1/4" Heliax 0.3 0.6
dB loss power loss in %
0.5 10 100W in 90W out
all of the above loss specs are manufacture specs, I strongly suggest that you measure you line loss w/watt meter if possible to know exactly what you are getting at the antenna.
IME most of the book specs are on the money for hardline ,RG8/213 can be a crap shoot depending on manufacturer. I've had some really bad and some pretty good.
LMR I've had a love/hate relationship w/, good cable but seems to be prone to moisture issues. wish I had pic of the 7yr old cable that pretty much self destructed.
hope this is of some help to those looking to put up a machine or control station in the future.
found this very useful