wrote:
I've used DavisRF and also bought coax locally.
http://www.davisrf.com/ham1/coax.htm
has an attenuation table. At 100ft, maybe you lose 3dB at 30Mhz with
the RG58.

I'm not as concerned about loss as much as will the cable hold up
outdoors, and the quality of the shielding.

RG-6QS quad shielded satellite dish coax. The shielding is better than
most small diameter 50-ohm coax. The impedance of RG-6 is 75-ohm but
that's not an issue for HF reception. Radio Shack sells a 100-ft roll
for $35.

http://tinyurl.com/e3wn3