[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Aluminum tape on toroids? What about the sticky side being nonconducting?
Original poster: Ed Phillips <evp-at-pacbell-dot-net>
Tesla list wrote:
> Original poster: Ed Phillips <evp-at-pacbell-dot-net>
> One thing *you* are forgetting is that at 200-300kHz, a 4" electrode rod
> placed above the top load is an
> extremely inefficient radiator. Its probably negligibly more than what
> a SSTC radiates by itself. To get
> efficient transmission of RF power, you need an efficient antenna. A
> 1/2 dipole antenna would have to be
> 2340 feet for 200kHz. There are other harmonics, but these are buried
> quite deeply.
> Also, SSTCs radiate quite a bit of RF in general. When I audio
> modulated my coils, I can pick up the transmissions
> on my friends HAM set-up (with his huge tower antennas) almost 10 miles
> away (flat terrain, no hills, mountains, etc...)
> Dan "
> I do something even simpler. I support the toroid between two fiber
> board plates, cut so as to leave an inch or so spacing. Simply wrap
> kitchen foil around each one and it forms a continuous conductor.
Huh? Reply wasn't to this particular message. Must be losing it. I
do agree that short antennas are very lousy radiators at LF.