On 11/29/15 11:19 AM, Joe Subich, W4TV wrote:
Check the properties of peanut oil before you use it. I can't quickly
find the breakdown voltage for peanut oil ... dielectric constant is
slightly higher (3 vs. 2.2) and dissipation factory almost 10 times that
of mineral oil but it may not be an issue in this application.
In these things, the electrical properties are almost immaterial. It's
not like a transmission line or capacitor where the permittivity or
dissipation factor are important.
Some of the literature seems to suggest Canola oil but Soy oil seems to
be the base of choice as "eco friendly" replacements for mineral oils
(e.g. Envirotemp FR4).
Cheap single weight motor oil might be a good alternative. Tesla
coilers have used it for insulation (not in capacitors, but for oil
insulation of HV gear).
Straight USP mineral oil is also a good alternative. Available at feed
stores as an animal laxative in gallon containers.
73,
... Joe, W4TV
On 11/28/2015 12:25 PM, Pete Smith N4ZR wrote:
My Cantenna-type dummy load developed a pinhole leak in the can, and all
the mineral oil drained out. I have several gallons of clean (unused)
peanut oil left over from Thanksgiving. Is there any reason not to use
this instead? From internet sources, the flash point appears to be
higher than mineral oil.
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