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Re: H4 Shielding?


 

Greetings,

I am curious about the route cause of the antenna VSWR measurement failure. As I understand it the internal missing shield problem (associated with the clones) just reduced the dynamic range of the VNA which would not significantly affect a typical low dynamic range antenna VSWR sweep.

Is the problem caused by high level EMI from a local source (possibly from a broadcast station) picked up by the antenna under test that overloads the TinyVNA test port? Or I wonder if self interference from the TinySA itself caused the problem?

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Best Regards,
Tom, VA7TA

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