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RF ground in an apartment.

D

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Jan 1, 1970
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Interesting, I"ve never even heard of them.

So, if I decide to change gears completely, lose the Faraday cage and
ground plane altogether and put in a proper RF ground, I assume the
same filtering still applies to the mains wiring to keep RF out of the
115V supply, it just won't be connected to a cage? I will probably
put this project on hold until I have the proper facilities, at which
point I'll do the proper research and figure out how to do it right.

Thanks to everyone for their help, I think this will wait until a
later day.

Steve
I put a few pictures from my coiling days on
alt.binaries.schematics.electronic Along with a bipolar coil which
would be more suitable for an apartment

The induction coil was from the 1910 book "The Tesla High Frequency
Coil," by Haller and Cunningham. It was a lot of fun to build.

The book is pretty amazing. These guys didn't go out and buy much -
they made it from scratch. They give instructions on making the
Induction coil to excite the Tesla coil, a magnetic gap, the
laminations to be cut for a home made shaded pole induction motor to
drive a rotary gap, electrolytic rectifier to use with a DC motor,
etc.

Not having gutta percha wire, double cotton covered wire, hard rubber,
etc.. I adapted it to what I did have.

I made the bigger of the two induction coils and wound it for use as
an induction coil (3-4" sparks) running from 20 VDC. The turns ratio
is about 1:60 and I was eating up condensors across the points of my
interrupter because the peak was well over 400 volts. I tried it on
all frequencies between 9 HZ and 200 HZ and found the best sparks at
88 HZ with a 30 uf condenser. (a car auto coil takes about 1/2 uf)

With three or (four) primary windings in series, I could operated it
as a transformer running from 120 VAC with 7,660 (5,800) volts out
and operating at 1KVA.

The secondary has about 13 miles of wire in it and if the resistance
is correct, I nailed the calculated length of wire to within 300 feet!
My turns counter was coming up short with each layer I wound, so I
increased the number of layers per bobbin to compensate.

Total project took me 3 months winding the secondary only took a week.
 
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