Please post pictures and diagrams of your new loop
and butterfly cap. I am very interested in building
the same thing, except mabe for 80 & 160. Also,
please give us details on the performance of your
new loop system, compared to dipole or vertical if
possible. Thanks.
Furman2020 K5QA
--- In loopantennas@..., "n4zou" <n4zou@y...> wrote:
I just finished a project I have been working on the last few
weeks.
A large Butterfly capacitor for my soon to be built 20 and 40
meter
transmitting type Magloop. It is 10-pF minimum and 100 pF maximum
with spacing for 12,000 volts. It is made from 15 gauge copper
sheet
metal, 1/4-20 all thread, 1/4-20 nuts, and Plexiglas. I used
aviation
snips to cut the copper, a drill press for the holes and a skill
saw
for the Plexiglas. Testing on another 20 and 40-meter loop
requires
17-pF at 14.350 and 91-pF at 7.0 MHz. The loop will also work on
30
meters as well. I just uploaded photos of the capacitor in the
photo
section. Just click on the N4ZOU folder. The old test loop used RG-
8
coax as the element and a split stator capacitor. You had to add a
second capacitor to get it to work on 40 meters. This new setup
will
use 3/4 inch copper pipe for the element and will have continuous
coverage between 14.350 and 7 MHz.
