Topband: Hairpin match to inverted L?
mikefurrey at att.net
Mon Sep 2 09:45:54 EDT 2019
I did and it was easy and worked well. I could not find much info (Internet found one picture and not much in handbooks for a hairpin on 160). I "WAGed" it and took #10 solid wire and wrapped 12 turns around a 3" form and shunted it across the feed point. I dialed in the match by spreading and compressing the coil. My inverted L is suspended between two tall trees with four resonated elevated radials (81' long) up 20'. My original feed point impedance was about 35 ohms. I used my Comet antenna analyzer for this process.
73, Mike WA5POK
On Sunday, September 1, 2019, 2:47:07 PM EDT, N4ZR <n4zr at comcast.net> wrote:
The other day a ham friend suggested using a coil ("hairpin") to match
the low impedance of a well-radialed inverted L to 50-ohm coax. This
struck me as a potentially-attractive alternative to a series vacuum
capacitor, but I don't know enough to evaluate it. Thoughts?
73, Pete N4ZR
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