I have RG-393 coaxial cable for sale which is new/unused. This type of coaxial cable has an insulation made from TEFLON (PTFE) which will not melt if you solder on this cable. Inner and outer conductors are silver plated copper. This cable carries up to 5kW continous power at 39MHz, so it is usable in QRP applications but its dimensions is just like RG-213. I sell very short runs and long runs as well, do not hesitate to ask and tell me how much you need. I ask 15,-€ for each meter, plus shipping from DL.