Topband: 160 Meters Mobile Antenna

[w7ti at ispwest.com (Bill Turner)]

On Wed, 07 May 2003 20:00:52 -0400, you wrote:

>PVC and PBT and other such plumbing pipe plastics are very
>lossy for RF. 

The traditional test for lossy plastic is to put a section of about
six inches in the microwave for 20 seconds or so and see if it gets
hot under full power.  To protect the magnetron, also put a small
amount of water in there to absorb the microwaves if the plastic
actually is loss free.

-- 
Bill, W7TI