What is a quarter wavelength of non-conducting plastic with unknown
dielectric constant?
73
Bill wa4lav
At 05:44 PM 7/14/2003 -0500, you wrote:
In testing plastics, just make sure the sample is not a quarter wave long at
the microwave oven frequency, or you will have a worst case test for
heating.
A small sample well under resonant lengths is preferred for testing along
with a cup of water. If the water boils and the pvc is not too hot by then,
it is low enough loss for intermittent amateur service.
73,
Stuart
K5KVH
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