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On Monday, February 09, 2015 00:13:23 you wrote:
HI Stefan!
> There's just one thing: The T antenna in the garden is resonated and
> matched to 50 Ohm. However i forgot to connect a 50 Ohm terminating
> resistor to the RX input. Probably the matched antenna does not act as a
> perfect bandpass for all frequecies and maybe there's a standing wave on
> the 20m long coax cable, resulting in a high input voltage in the HF or
> lower VHF range?
You should say "20m short coax cable" ;-) = 0.032 wavelength!
In my opinion if the cable is shorter than 0.1 wavelength and low loss
VSWR doesn't matter.
73 de Claudio IK2PII
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Claudio Pozzi - rispondere a [email protected]
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