Just cut 20 more 70' radials. Time to go play in the yard.
73, Pete N4ZR
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On 11/12/2022 11:41 AM, Grant Saviers wrote:
The 34 ohms is the sum of Rr (antenna radiation Z over perfect ground)
and Rg (ground R loss). Rr depends on the dimensions of the L plus a
bit of wire loss. My guess is Rr is about 10 ohms less than 34 ohms,
some easy modeling will determine it.
Then it is a question of what antenna efficiency you want vs cost and
time for more radials. If 10 ohms is Rg, then about 1/3 of the TX
power is warming the worms.
Grant KZ1W
On 11/12/2022 07:31, ws6x.ars@gmail.com wrote:
In my experience here in "ROCK"ingham County, I didn't reach the
point of diminishing returns until around 32 radials of varying
lengths (Most were either 50 or 100' long.). Much would depend on
length, configuration, terrain and ground conductivity.
Jim - WS6X
-----Original Message-----
From: Topband <topband-bounces+ws6x.ars=gmail.com@contesting.com> On
Behalf Of Pete Smith N4ZR
Sent: Monday, November 7, 2022 4:27 PM
To: topband reflector <Topband@contesting.com>
Subject: Topband: How good is good enough
Now that the lawn mowing is done for the season, I resuscitated my
160M inverted L. With 13 on the ground radials, each roughly 70 feet
long, measured R of 34 ohms seems OK to me. Is it worth laying down
more radials, or am I approaching diminishing returns?
--
73, Pete N4ZR
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