I have a 48' tower, and have modeled the advantage of going to 70'. Over
flat terrain, the models show an advantage of 2 dB at all of the useful wave
angles.
Dave Hachadorian, K6LL
Yuma, AZ
-----Original Message-----
From: Robert Gerace
Sent: Tuesday, July 14, 2020 9:24 AM
To: towertalk@contesting.com
Subject: [TowerTalk] 20m monoband Yagi height
Please forgive my inability to figure out how to search archives by subject
as I have to imagine this is a common question.
Understanding the best answer is “as high as possible” and the second best
answer is at least one wavelength...
I wanted to ask about some real world experience between 50’ and 66-70’...
Specifically: given the same antenna, same QTH, same general point in the
solar cycle...
Has anyone had a 20m monoband, trapless beam at ~50’, then raised it to ~70’
and seen enough consistent improvement to justify the effort?
Background:
Given my QTH I have about 55’ to tilt my (in process of permitting) tower.
If I want to go higher I’m clear to 70 easy. However it will require
telescoping (e.g. lower to 55, then tilt) to be able to service from the
ground — a requirement for me.)
The cost difference is very substantial all the way around: purchase,
shipping, footing, installation).
So I’m wondering if it’s worth all the time and trouble to get an extra
15-20 feet?
Background: I’d like a big signal, would like to have at least a 50-75%
chance to bust most pileups... even if it takes patience...but I’m a casual
DXer who after 44 years is getting serious about 20m CW DXCC.
I’m not trying to be the guy who is first through the pileup or even places
in a DX contest... but I’m tired of being the guy who can only reach for low
hanging fruit. I want to work some more dopamine inducing DX and maybe turn
in something more than average on contests.
I live in NE FL, a mile from the beach, on very sandy soils, and have oak
trees at 45’.
Any insight appreciated.
Thanks es 73
Bob
KD4Q
Sent from my iPhone
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