Topband: Historical note: Radial Depth

[n4is at n4is.com]

Just a remind that any tower few miles!! away needs to be detuned to avoid
pattern distortion. Like cellphone towers.

It is the same for 160m TX tower or arrays, every tower is an antenna on low
bands.

73's
JC

-----Original Message-----
From: Topband <topband-bounces at contesting.com> On Behalf Of F Z_Bruce
Sent: Saturday, October 13, 2018 11:51 AM
To: 00tlzivney at bsu.edu; Topband <topband at contesting.com>
Subject: Re: Topband: Historical note: Radial Depth


AM radio stations did and still do have to meet field strength readings at
contour data points. (.Ground wave field strength way point readings.).
Directional antennas had to be carefully maintained. to protect stations
operating on  the same frequency at some distance.  Radials on the  earth
surface  are more subject to change than buried ones.. 

73
Bruce-k1fz
https://www.qsl.net/k1fz/bognotes.html



Don't forget that historically many if not most broadcast stations, plus the
legendary work of Brown, Lewis and Epstein, had their radials in farm fields
and cow pastures, where anything on or near the top of the ground would be
destroyed.  

Terry N4TZ
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