[Elmers] Hairpin match on an 11 element UHF Yagi
Mike Mahan
k6msm at outlook.com
Tue Jul 21 21:17:13 PDT 2020
Hi all,
The pictured antenna came with a gamma match, but I didn't have any luck (yet) getting it to work well around 442.5 MHz. The antenna may have been designed for 432 originally, I suspect.
I have changed it over to a hairpin match (I hope), but the results are no better so far. Maybe it's time to cut all the elements shorter by a few mm.
Or maybe I need more insulation between the 2 sides of the driven element or more spacing, etc.
I haven't found a hairpin calculator to see if the one I made is too big (or too small). What is a good way to find out?
And if it helps, this is the UHF antenna I bought from SOARA from Hal's estate.
Thanks all for any suggestions.
73,
Mike
K6MSM
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