Have a 100 foot roll(approx) of used coax cable which has no markings....
I do have a bunch of older RG-58 with solid center conductor, and

....[snip]....

.... How about Belden 9913? Of course, the construction of that line
is "different" enough that it would be hard to mistake it for something
else, and I assume ....

For those of us who never noticed -- or never recognized -- the
difference in the first place, could you please explain what I
should have recognized?

--Myron
--
--Myron A. Calhoun.
Five boxes preserve our freedoms: soap, ballot, witness, jury, and cartridge
NRA Life Member and Rifle, Pistol, & Home Firearm Safety Certified Instructor
Certified Instructor for the Kansas Concealed-Carry Handgun license