Reg Edwards wrote:

By how much does the length of the short-circuiting bar at the end of the
1/4-wave stub affect its resonant length?

I just twist the ends together. I don't use a bar.

What open-circuit resonant frequency does the stub change to when the short
circuiting bar is removed?

Same resonant frequency - virtual impedance at the input is reversed.
--
73, Cecil http://www.qsl.net/w5dxp



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