Topband: Hairpin match to inverted L?

[ly2ij at qrz.lt]

Hi Pete,

Here is picture of coil I made to tune Inv. L at 9Y4 with 15-20 Ohm impedance. It was tuned in 2 steps:

1. calculate and wound coil to rise R close to 50 Ohm
2. adjust horizontal wire length back to desired freq.

https://photos.app.goo.gl/7eVBt5t8yCAvsaZg7

Used thin wire for coil, not sure if it is right or not, used what I had there.

73
Arunas LY2ij /LY5E



2019 m. rugsėjo 1 d., 21:47 val., "N4ZR" <n4zr at comcast.net> parašė:

> 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