[Elecraft] K3 working on motorboats - possible

[gt-i at gmx.net]

Jim,
you are right, too often we mean counterpoise and say ground.
Hopefully Peter can start doing his experiments based on our wisdom and
I'm curios what will work ok for him.
73 Gernot DF5RF

Am 09.06.2020 um 22:42 schrieb Jim Brown:
> On 6/9/2020 1:21 PM, gt-i at gmx.net wrote:
>> anywhere then you either need a long vertical plus good ground as
>> mentioned already
>
> WRONG. An end-fed wire needs a COUNTERPOISE, not a connection to
> mother earth. A counterpoise is a low resistance conductor that
> provides a return for the current and the field produced by the
> "intentional" part of the antenna, and the counterpoise IS a part of
> the antenna. Salt water IS an effective counterpoise because it is a
> good conductor; fresh water is NOT, because it is NOT a good
> conductor, so it burns transmitter power.
>
> Likewise, a ground rod is a lousy counterpoise, because the earth is a
> big resistor, and can easily burn much more than half the
> transmitter's power. Radials serve as both a counterpoise and a shield
> ("screen" in British English) -- they shield the field from lossy
> earth AND serve as a return for the current and the field.
>
> 73, Jim K9YC
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to gt-i at gmx.net