[TowerTalk] 20m monoband Yagi height

[W0MU Mike Fatchett]

I believe that 100 ft is a desirable height for 20m.  I have always had 
70ft towers, which seems to be a good tradeoff for a tribander.  70ft 
will be better than 50ft, but both probably work just fine for 95 of 
what you might be doing.  I was going to stack tribanders at 70 and 40 
feet.  I was more into domestic contests so the lower height of the 2nd 
antennas plays into that plus it helped with some terrain issues filling 
in some path angle gaps.

You can model this this HFTA  or HTFA and see for yourself if the extra 
height is worth it.



On 7/14/2020 10:24 AM, Robert Gerace wrote:
> 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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