Some of those techniques are more about measuring a high impedance component, so they wouldn’t work.
You’re making an S11 measurement - it’s just challenging because for end fed antennas, there’s more to the antenna than the wire you’re at the end of.
It’s the same as trying to measure the Z of a top hat loaded vertical or a vertical of any kind - where does the “other terminal” connect?
In the case of an end fed, the “other half of the antennna” is often the feed line.
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On Feb 26, 2025, at 12:02, Christian BARTHOD F8GHE via groups.io <cbarthod@...> wrote:
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Jim thanks very much for your advise.
During this afternoon I found these urls and now I don't know what is the best way to measure my end-feed antenna : Your or one of these :
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73 s Christian F8GHE
