There is no magic about 120 radials, and long before 120 radials are
reached the increase in field strength pretty much stops.
According to the 1937 BLE experiments and IRE paper, this depends on their
length.
If they are short (~0.15WL), then there is little improvement in radiated
field
think N6RK and others have measured the same.
73 Tom
- Original Message - From: DAVID CUTHBERT
telegraph...@gmail.com
To: Rick Kiessig kies...@gmail.com
Cc: topband@contesting.com
Sent: Saturday, December 15, 2012 10:49 AM
Subject: Re: Topband: Optimal radial wire type and gauge
Tom,
I think you are extrapolating one case with a particular radial length to
all vertical antenna ground systems.
The N6LF radial papers detail his NEC-4 simulations and measurements of
vertical antennas and radial systems. If I read his papers correctly base
impedance does track field
easier said than done!!
Charlie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of DAVID
CUTHBERT
Sent: Sunday, December 16, 2012 8:06 PM
To: Tom W8JI
Cc: topband@contesting.com; Rick Kiessig
Subject: Re: Topband: Optimal radial wire type
Read the N6LF radial papers and you will see that 1/8 wavelength radials
are about as good as one can do. I use #14 stranded copper THHN wire
because it is easy to work with.
But how good can we get? For a 30' base loaded vertical I have 90 radials
having an average length of 18 ft. The ground
; topband@contesting.com
Subject: Re: Topband: Optimal radial wire type and gauge?
I use whatever I can find at the lowest cost which has been mostly #16 and
18 stranded and insulated in 500-1000' reels at a local surplus shop. Ive
even used #22 when the other wasnt on hand and it was a weekend
...@gmail.com
To: Rick Kiessig kies...@gmail.com
Cc: topband@contesting.com
Sent: Saturday, December 15, 2012 10:49 AM
Subject: Re: Topband: Optimal radial wire type and gauge?
Read the N6LF radial papers and you will see that 1/8 wavelength radials
are about as good as one can do. I use #14 stranded
Rick Kiessig
Skickat: den 14 december 2012 15:30
Till: topband@contesting.com
Ämne: Topband: Optimal radial wire type and gauge?
The recent talk about optimizing the number of radials has me wondering
about the optimal type and gauge for radial wire. I've been using #14
stranded, insulated copper
: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Rick
Kiessig
Sent: Friday, December 14, 2012 9:30 AM
To: topband@contesting.com
Subject: Topband: Optimal radial wire type and gauge?
The recent talk about optimizing the number of radials has me wondering
about the optimal type and gauge
: Topband: Optimal radial wire type and gauge?
The recent talk about optimizing the number of radials has me wondering
about the optimal type and gauge for radial wire. I've been using #14
stranded, insulated copper, but for no reason other than it's readily
available in 500 ft spools at a decent
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