Wednesday, 21 May 2014

Grounding Tuner

Wire antenna with no tuner or ground connection (analyser connected to nothing but the coax).
There are 3 resonant frequencies, the antenna is probably behaving like an end fed half wave.

Same wire antenna with the tuner in bypass mode and the case of the tuner connected to metal heating pipe. Tuner also connected to its 13.8V PSU.

Totally different, there are still some dips in the SWR at around 8 and 16MHz.

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