I have an 80m inverted L up and running very nicely with 26 x 60' radials. I'm thinking about adding 40m. My support for the 80m L is at 46' on a pulley connected to a cross-boom 5' out from my tower
Hi Bruce, The only way for the bandwidth of an inverted L to be broad is if there are excessive losses. If you measure the resonant impedance at the feedpoint and compare it to the known radiation re
Inverted L's have similar bandwidth to a 1/4 wave vertical...and it isn't "real broad" without excessive return loss. All measurements need to be made at the feedpoint. I've done radial studies on my
Yes, it can be quite easy...not for precision but for "effectiveness". Forget the megger...other than an intellectual exercise, it will tell you nothing about the effectiveness of your radial field f
Phil, 60 1/4 wave radials is OVERKILL in many situations (all but the worst local ground characteristics), and a LOT more work and expense than is needed. than is needed. See the K3LR radial optimiza
(This formula is from both QST and Low Band Dx'ers Handbook by Devoldre) Obviously a ton of short radials does not equal a ton of long radials, but it can get you really close. See the articles for l
http://www.ncjweb.com/k3lcmaxgainradials.pdf This document contains the "proof" for the formula that I listed. It is an excellent reference for anyone who wants to know about losses in their vertical
Pat, what are the details of your trap? I'm using an inverted L for 80m, about 5' away from my tower and have been VERY happy with its performance. I've often thought of putting a trap in it and exte