Belden 735A1

[WA1GFZ]

I ran into a cousin selling at the nutmeg flea who handed me two partial spools of Belden 735A 75 ohm coax. He used them on a contract job and was going to scrap them if nobody wanted the stuff. It turns out the stuff sells for about $4 a foot. He said they are used for data but never saw 1/8 inch coax like that.
Looks perfect for RX antennas. #26 solid center conductor
Anybody know where it is used?

[ke7trp]

I had some of that here. I looked up the ratings and saw a max of 300 volts.  Off to the recycler it went.  It also had a high DB loss. I cant remember the specs.


C

[k4kyv]

I once passed up a freebie that I still kick myself for.  A near-by ham had a roll of coax that looked about the size of RG-11 from the outside, but the inner conductor was tiny stuff, about #20 gauge.  It must have been pretty high Zo.  Would be ideal for something like interstage coupling or coupling a high impedance output VFO to a transmitter some distance away.  It didn't occur to me at the time that the stuff might serve any useful purpose, so I didn't take it.  Now it is probably unobtanium.

[The Slab Bacon]

I picked up a bunch of data coass some years back and never found out what it was called. It was from an early inter-office network. It is exactly the same size as RG-58, but it has a teflon dialectric and outer sheath and the shield braid is just plain copper (not silver plated). The jacket is a tan colored transparent teflon.

It is great stuff for making short patch cords and jumpers, also coax runs under the chassis of a project. Being the teflon dialectric, you can wail the heat on it when soldering it and it won't melt.

[WA1GFZ]

I cut it open and looks very well shielded. It will be make great for RX antennas.
Attenuation looks good but DC resistance of a #26 center conductor a bit high for very long runs.