Yes. This is easily (and cheaply) killed by a stub.
http://k9yc.com/Coax-Stubs.pdf Pay careful attention to the Q&A
beginning on page 7 "Does it matter where a stub is connected? Why?"
And for a detailed "how to," study http://k9yc.com/LocatingStubs.pdf
73, Jim K9YC
On Sun,4/16/2017 12:18 PM, Richard Thorne wrote:
The station on 20 was, more than likely, getting hit with 40m
harmonics. I have high power band pass filters (4O3A products) and I
can still here my 40m signal on the exact harmonic on 20m. For
example if I'm transmitting on 7.025 I'm going to hear the harmonic
around 14.050.
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