[TowerTalk] Stacking question - another reality data

[Jim Thomson]

Date: Tue, 9 Aug 2016 21:06:54 -0400
From: "Tim Duffy" <k3lr at k3lr.com>
To: <k1ttt at arrl.net>, <towertalk at contesting.com>
Subject: Re: [TowerTalk] Stacking question - another reality data
point

I have 41 years experience in stacking 2, 3 and 4 Yagi's high.
After many hours behind the HFTA and NEC model engines - then putting Yagi's
up in the air and using them for many years here at K3LR - these are the
stacking distances that have worked very well at this Western PA QTH:

Lowest Yagi height:
40 meters - 118 feet
20 meters - 50 feet
15 meters - 40 feet
10 meters - 33 feet

Then - stacking distances by band:
40 meters - 72 feet
20 meters - 60 feet
15 meters - 40 feet
10 meters - 33 feet

All OWA Yagi's on all bands at K3LR have booms that are 48 feet long (it
makes a difference).

73,
Tim K3LR

## How did the 118 ft for the lowest height for 40m  come about ?  That and the
72 ft stacking distance on 40M ?   That would put the upper 40m at  190 ft. 
72 ft  spacing on 40m is like 36 ft spacing on 20m. 

##  I would have thought that a 95 / 190 stack on 40m....with 95 ft spacing  would
have been the ticket. 

Jim  VE7RF