[HBR] Riddle me this!

[ke9xq at charter.net]

Greetings Guys
Just a thought, and probably shared by someone else
before, but not to much spam here, so here goes.
Place a glass of water in your microwave and a peice
of the material you want to use for the coil form.
Boil the water and see if your material got hot or deformend
you probably don't have to boil the water, and a lot of
stuff gets warm in the microwave oven, but if it passed the
test, I think you are at least in the ball part as to dielectric
losses go.  Not sure of myself, but that's one of the tests
I plan on running, when I get to that spot in my project.
I've saved a lot of material, inculding music roll : ) tubes, and
have varnised some of them.  I've saved little glass glasses, a
couple of plastic glasses, some golf handle protector tubes,
some old vacuum cleaner tubes, medicine bottles, and of
course octal tube dud bases, so I have a lot of experimenting
waiting for me down the road a bit : )  Adding machine paper
spools (when the paper is done) Sewing spools of all sorts and
made of different materials.  PVC piping of variuos qualities...

Had a thought for tubes too.  Find or make a form the exact size
you want, or just a tad smaller, but not much.  rap a peice of
paper over it, just a tad of tape, and shelac it.  When dry pull
it off the form and maybe shelac the inside if it did not penetrate
very well.  You could use wax paper over the form to help remove
the form when it is dried.  If this is to fragile, use two sheets of
paper or whatever product you choose to make the coil form out of.

Probably needs to be fairly rigid if you plan on swapping out your
coils very much : )

73 Everyone
Bill  KE9XQ


On Fri, Nov 28, 2014 at 1:53 PM, Brian Burns wrote:

> Hello Ron,
>
> ~ The numbers that you listed appear to refer to the dielectric 
> constants of
> the materials, not for dielectric losses. For the latter, you should 
> look at
> "dissipation factor". Use a search engine for further info.
>