I found some conflicting info on this, and am just looking for an opinion on whether this cable will work. I have a reel of probably close to 300' of RG-8/U coax... the wire itself is labeled Tandy Wire & Cable E111378A Type RG-8/U MINI FOAM 16 AWG "CL2" 75C "(UL)" It's wound on an original metal Belden "Made in USA - Chicago" blue & white reel, looks like no one would have gone to the trouble to re-wind it onto that from another reel, so I'm thinking (that my guess of its age is from the 70's) that at that time perhaps Tandy actually had it manufactured by Belden. It actually seems to be the RG-8X type (about 1/4" diameter), with copper shield and 7-strand 16 gauge bare copper core. I've used lengths of it before with great results for Field Day on 20 meters running 100 watts. My question is: can I use a full 100' length of it into a 20 meter vertical using power (up to a KW SSB on peaks from an Ameritron AL-80B). I read on eham that one gentleman said he ran full legal limit in FL using RG-8X with no ill effect. I would just be using it for mainly SSB, not RTTY at that power by any means. I see though that some specs limit the power to around 700 watts. On CW, the AL-80B is only rated at around 800 watts. The line voltage here where I live in PA now is only 117, not 125 as I had before, so I wouldn't be pushing the power by any means. Is anyone familiar with this cable type and if it is actually an 8X cable? Thanks.