On 5/2/2020 3:43 PM, VE6WZ_Steve wrote:
I made a number of measurements of my Beverages last summer including using TDR
to estimate physical length. This depends on knowing the VF of the wire.
However, If you know the physical length length, the using the TDR function you
should be able to
Mikek,
I made a number of measurements of my Beverages last summer including using TDR
to estimate physical length. This depends on knowing the VF of the wire.
However, If you know the physical length length, the using the TDR function you
should be able to derive the VF of the BOG.
Here is
Hi, Mikek,
BOGs have a very miscellaneous performance, some love 'em, some hate 'em,
nobody telling a lie. One part of a back yard can have a heated BOG
argument with a different part of the same back yard, both sides verified
with MEASUREMENTS. The secret has to do with the BOG in DOG disguise,
Hi Mikek,
Speed of Light = Frequency x Wavelength
Therefore: Speed of Light/Frequency = Wavelength
Speed of light = 299 792 458 m / s (I normally just use 300,000,000 m/s)
Therefore: (300,000,000m/s) / (119 Hz) = 252.10 meters But this is a
full wavelength, so you have to divide 252.10
I laid down 260ft of wire as a dipole on the ground, it is resonant at
1190kHz.
I calculate this as a VF of 0.685, my calculation is actually 0.315 but
I don't think that's right,
so I subtracted from 1. Can someone post the proper formula to calculate
the VF using Resonant frequency and
I'm about to do some measurements on a BOG.
I've been a little slow getting things working, I've now got my inside
and outside boxes assembled,
I understand I can break the BOG in the middle and find resonant
frequency as a dipole.
From that I can calculate the VF. I may leave this for a while
In addition to being a superb Topband operator, Herb also operated some on 50
MHz. I worked him back in May, 2017
on 6 Meter CW. Nice to see NØUU's note about him, as well as the others.
Hope everyone stays safe. -- Jon N0JK
_
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