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Re: [TowerTalk] LPDA optimal height

To: "Jeff AC0C" <keepwalking188@ac0c.com>, <towertalk@contesting.com>
Subject: Re: [TowerTalk] LPDA optimal height
From: "StellarCAT" <rxdesign@ssvecnet.com>
Date: Mon, 13 Feb 2017 19:39:33 -0500
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
I believe you answered your own question - there isn't an idea height unless you have a specific purpose in mind. That said based on what you have I'd say 75' would be a good overall height - or keeping with your range then 80'.

Gary
K9RX



-----Original Message----- From: Jeff AC0C
Sent: Monday, February 13, 2017 7:06 PM
To: towertalk@contesting.com
Subject: [TowerTalk] LPDA optimal height

I’m considering putting up an LPDA this summer to augment the existing stuff. The LPDA would serve two purposes:

1. 30m/17m/12m DX chasing. I suppose that really means 30/17 as I can’t remember the last really solid 12m opening...

2. Fixed-on-SA for 20/15/10m when contesting.

The problem is the usual tools for helping on height (HFTA) are more or less band specific so what is the best height on (for example 20m into SA) is not really a great height for another equally important (e.g. 30m DX into eastern side of EU). In playing around with HFTA clearly each height seems to provide some benefit over another. Higher band and higher height gives more nulls but better low angle performance.

I figured that something around 80-100’ overall but would greatly appreciate any suggestions...

73/jeff/ac0c
www.ac0c.com
alpha-charlie-zero-charlie


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