NoSPAM wrote:

...
Silicone oils are excellent from a health standpoint and usually very
good from a flammability standpoint. However, the Cantenna relies on
natural convection of the oil for cooling and the higher viscosity of
commonly available silicone oils will limit the power handling
capability of the Cantenna. Remember that the Cantenna must be de-rated
when used for long duty cycles, and a high viscosity oil will lower the
power rating still more. Also remember that silicone oils are not cheap
(and my buddy at Dow would only send me small samples).
...
unknown to the EPA until I provided them to the Atlanta EPA office.

Barry L. Ornitz, PhD WA4VZQ

Well, yeah ...

However, the last silicone oil I purchased was at an auction. I was a
cannery being close, about 2-3 years ago. It was a 5 gal. tin, seems to
be about 10w-15w (no zahn cup to even begin guessing viscosity with); it
was $20.00, if I remember correctly. (a lucky fluke, I admit, and food
grade to boot!)

However, if I had to choose a 2nd, easily available source, and cheap, I
would get some pint bottles of 100% silicone spray used for protecting
seats, dashboards, panels, etc. in autos. At $1.88 + tax--a pint, a
gallon would be under $20.00. And, again, a cheap easily available
source to all--without shipping costs ...

Presently, I used the auctioned silicone I purchased, on my car
interior, tires, etc. ... lol

You know, if everyone has so many problems in doing the simplest things,
makes one wonder what they do when they hit a real snag! scratches-head

Regards,
JS