>Having walked around on the beach with a battery K2 listening to incoming signals on a short antenna, walking 50 feet from the water drops signals multiple S units."
Perhaps the handheld radio has a better ground connection, capacity coupled or not, through you and into the salt water + sand at the beach. Then, walking away from the beach that connection is greatly diminished. 73, Charlie, N0TT On Tue, 20 Dec 2022 08:58:23 -0500 Guy Olinger K2AV <k2av....@gmail.com> writes: > Having walked around on the beach with a battery K2 listening to > incoming > signals on a short antenna, walking 50 feet from the water drops > signals > multiple S units. Over the beach there is an absorption zone > starting at > the sand at water�s edge which goes higher and higher the farther > from the > water. This isn�t EZNEC, just observation on Core Banks, NC during > a number > of IOTA contests. Very easy with all those signals to hear what was > going > on. > > On 40m there was a big difference between a doublet at 40� and > 50�, back > from the beach about 200�. > > Apparently sand wetted with salt water is quite lossy. > > But even not optimal at the beach smacks the snot out inland > locations. > Which IMHO explains the wide variety of beach-based reports. > > Also a very short vertical radiator away from water�s edge will > not hear as > much as a tall one as the tall wire has more intercept outside the > absorption zone next to the sand. > > It�s really quite a complex subject. > > 73, Guy K2AV > > On Tue, Dec 20, 2022 at 7:28 AM <n...@comcast.net> wrote: > > > Hi Frank > > > > You wrote " . A vertical over a salt marsh or within about a > wavelength of > > salt water will produce > > 6 dB or more of gain at low angles compared to a vertical with > poorly > > conducting soil in its reflection zone > > " > > > > The assumption that "next to the water" is the same as "in the > water" , is > > a > > not right. It is not the same ! > > > > I listen to George signal with vertical "in the water " and the 10 > db > > difference in signal is real. Moving the antenna on the beach and > you lose > > 10 db or even more on practice, not on paper. > > > > I see that on my S meter more than a dozen times. > > > > George has a vertical on his house in Miami, the ground plane is > just a > > plate down the water. The vertical is made with fiberglass pole > 18m high. > > My > > antenna is a full size vertical with a good radial system over the > > Everglade > > land, if I dig 2 Ft I have water from the Everglade underground > river. > > > > George can run a pile up from Europe with 10W, I can keep up with > him > > running legal limit power. We are talking about 160m only. > > > > 73's > > JC > > N4IS > > > > _________________ > > Searchable Archives: http://www.contesting.com/_topband - Topband > > Reflector > > > -- > Sent via Gmail Mobile on my iPhone > _________________ > Searchable Archives: http://www.contesting.com/_topband - Topband > Reflector >
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