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[TowerTalk] RE: Error in ARRL Antenna Book??

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Subject: [TowerTalk] RE: Error in ARRL Antenna Book??
From: (Mendelsohn, Steve (1st VP))
Date: Tue, 1 Jul 1997 00:48:00 -0400
Hi Morrison. Read your post and thought I would ask Mark Wilson, K1RO
Editor of QST, to look into it.  He, in turn, asked Dean Straw, ARRL's
antenna guru.  Here's his response.  -73- Steve Mendelsohn, W2ML
ARRL First Vice President
From: Straw, Dean,  N6BV
To: Wilson, Mark  K1RO
Subject: RE: Error in ARRL Antenna Book??
To: <>
Date: Monday, June 30, 1997 12:44PM


Previous editions stated the gain over ground (without specifically saying 
so!). The 6.7 dBi gain in the 17th Edition (and the 18th too) is 
specifically stated to be in free space. This models very well using NEC2, 
by the way.

Add about 5.5 dB for a good ground reflection, and you get 12.2 dBi for the 
peak gain over ground, or about 10 dBd over a dipole in free space.

Previous to the 17th Edition, writers tended to be a little sloppy about 
whether the antenna was in free space or not...

If I were VK3BCY, I'd stick with the much simple pure Yagi design in the 
17th or 18th Edition. It is mechanically a lot simpler than an LPDA and 
works every bit as well.

73, Dean, N6BV

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