[TowerTalk] 16om vertical and the number of radials

[Peter Voelpel]

What is the simulated radiation resistance with only 32 radials?
Resistance above 37 ohms reduce the efficiency.
I needed >90 radials on my 160m and 80m verticals to bring it below 40 ohms.

73
Peter, DJ7WW

-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of
Ignacy Misztal
Sent: Freitag, 2. Dezember 2022 15:25
To: tower and HF Antenna Construction Topics.
Subject: [TowerTalk] 16om vertical and the number of radials

Do more radials on a 160m vertical bring more improvements than shown by
simulation?

Most simulations show that going above 32 radials on 160m brings minimal
improvement, say 1 db to 2 max. Even for low angle signals.

On the other hand, some really loud stations n 160m, say 5-10 db above the
crowd, use a massive amount of radials. This is for inland stations, far
away from salt water.

Is there any discrepancy between modeling and real life performance with
the number of radials? Does adding radials beyond 32 help much? Any real
stories?

Ignacy NO9E
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