Original poster: Gomez Addams <gomezaddams@xxxxxxxxx>
On Jan 13, 2007, at 7:44 PM, Tesla list wrote:
Original poster: "Jim Mora" <jmora@xxxxxxxxxxx>
Hello,
Somewhere in the archives is a loss table for different types of
coil forms.
I think maybe Richard Quick compiled them. I any case, PVC does become
pretty lossey in the high freq spectrum.
Oh, absolutely! I recently had to come up with a VERY low loss
radome for 5.3 GHz. The only thing that was acceptable was thin
polyethylene. Teflon would have been fine, but it's a bear to form,
and I had to have a closed-end cylinder. I wound up using the bottom
of a 1 gallon vinegar jug! Its presence was almost undetectable on
the network analyzer.