On 2/23/2020 11:49 AM, wc1m73@gmail.com wrote:
Can anyone confirm that stubs work best 1/4-wave from the transmitter?
That's a serious oversimplification. Here's the detailed answer. It ran
in NCJ a few years ago.
http://k9yc.com/LocatingStubs.pdf
And here are slides for a "big picture" overview talk I gave at Visalia
last spring.
http://k9yc.com/Multi-Station.pdf
The executive summary: spacing between stub and output stage always
matters, and what's best depends on the output network. Spacing between
stub and antenna matters IF the antenna is NOT resonant on the harmonic,
but does NOT matter if the antenna IS resonant on the harmonic. And two
stubs, 1/4 wave apart at the harmonic frequency is much better than a
single stub.
73, Jim K9YC
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