[Milsurplus] mf antennas etc.

[KD7JYK DM09]

"Right on black PVC absorbing rf.  Just put the plastic you desire to use in 
a microwave and see it it heats up a bit.  If it does, don't use it."

That's fine at 2.54 GHz, which isn't one of our bands...  You need to do a 
real world test.  If operating at 1.8 MHz, test it there.  It doesn't matter 
what it does elsewhere in the spectrum.  It could be a total load or 
completely invisible to RF, but if it gets warm in a microwave oven, it's 
not good for that frequency.

"We always used white PVC  for the cross arm on our dual crossed yagis 11 
element beams for satellite work and worked FB."

I tried that twice.  The first time it shattered in the cold during the 
Winter, the second time it became brittle due to UV radiation and shattered 
the following Summer.

Kurt