Total posts : 45366
Just my opinion, but a capacitance hat
will change the way the antenna
resonates, so the transmitter’s tuning
system might not work right.
I think most of the Part 15 longwave
experiments use capacitance hats.
But the longwave people are very low
key – they are not broadcasting – so
therefore they are under the radar. They
are mostly using morse code and other
digital languages. (And they are doing
I think it is the feeling in the longwave Part 15
community that the top hat is not an antenna –
but a capacitor. Theoretically, for each spoke
in a top hat, there will be an opposite one that
will be out of phase. So any radiation from a
spoke will be canceled out by it’s opposite.
However, I don’t think it is a good idea for
Part 15 AM broadcasters to use top hats no
matter what kind of transmitter is in use.
I have to go, unfortunately.