MW1CFN via rec.radio.amateur.moderated Admin
2022-04-16 19:09:09 UTC
Real-World Amateur Radio
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Intermediate licensee challenges laws of physics.
Posted: 13 Apr 2022 07:29 AM PDT
https://mw1cfnradio.blogspot.com/2022/04/intermediate-licensee-challenges-laws.html
I'm always surprised that so many people seem not to realise that using a
horizontal antenna next to sea water, whilst hardly unlikley to produce
good results, is nevertheless going to produce vastly reduced performance
compared to using a vertical. At least insofar as our usual quarry - good
DX - is concerned.
This 1952 graphic (based on real measuerements, not models), and any number
of modern versions, is all people like 2W0YMS need to absorb. It's not
difficult. Fields depicted over perfect ground (i.e.similar to seawater).
So I idly commented on the latest 'holiday-style' DXpedition that were
merrily using a horizontal dipole, on Twitter yesterday.
I was a bit surprised to find a fellow Welsh amateur pipe-up with a rather
odd - and wholly pointless - response, which clearly indicates his belief
that the horizontal vs. vertical assertion is wrong. Oh, and that I appear
to buy antennas "off the shelf" (I invariably build my own antennas, and
never bought a vertical HF antenna):
Well, it takes all sorts. Even ones who are not particularly adept at
punctuation, or being a bit circumspect about what they commit to the
public sphere.
For those who are more interested in learning than being pointlessly
abusive online when your argument is fundamentally incorrect, you can try
this site by the Royal Signals ARS, as but one of very many you will find
online and in books.
Given the choice between people like the late Les Moxon, G6XN, and an
upstart like 2W0YMS, I know which one I will take notice of. Maybe a copy
of the ARRL Antenna Book and/or HF Antennas for All Locations for you next
Christmas, Mark? You might just learn something and even go try it out for
yourself.
///////////////////////////////////////////
Intermediate licensee challenges laws of physics.
Posted: 13 Apr 2022 07:29 AM PDT
https://mw1cfnradio.blogspot.com/2022/04/intermediate-licensee-challenges-laws.html
I'm always surprised that so many people seem not to realise that using a
horizontal antenna next to sea water, whilst hardly unlikley to produce
good results, is nevertheless going to produce vastly reduced performance
compared to using a vertical. At least insofar as our usual quarry - good
DX - is concerned.
This 1952 graphic (based on real measuerements, not models), and any number
of modern versions, is all people like 2W0YMS need to absorb. It's not
difficult. Fields depicted over perfect ground (i.e.similar to seawater).
So I idly commented on the latest 'holiday-style' DXpedition that were
merrily using a horizontal dipole, on Twitter yesterday.
I was a bit surprised to find a fellow Welsh amateur pipe-up with a rather
odd - and wholly pointless - response, which clearly indicates his belief
that the horizontal vs. vertical assertion is wrong. Oh, and that I appear
to buy antennas "off the shelf" (I invariably build my own antennas, and
never bought a vertical HF antenna):
Well, it takes all sorts. Even ones who are not particularly adept at
punctuation, or being a bit circumspect about what they commit to the
public sphere.
For those who are more interested in learning than being pointlessly
abusive online when your argument is fundamentally incorrect, you can try
this site by the Royal Signals ARS, as but one of very many you will find
online and in books.
Given the choice between people like the late Les Moxon, G6XN, and an
upstart like 2W0YMS, I know which one I will take notice of. Maybe a copy
of the ARRL Antenna Book and/or HF Antennas for All Locations for you next
Christmas, Mark? You might just learn something and even go try it out for
yourself.