[CQ-Contest] TH7 Replacement

[David Pruett]

Check out the W2PV yagi book or the W2PV Yagi design series in the old Ham Radio magazine.  Both of which documented a 4L 20M yagi on a 51' boom with big gain and good pattern.  It WAS somewhat narrow banded but one or two extra elements can be added for more bandwidth if desired.

My buddy W5XZ had a pair of these 4Ls stacked which worked very well at his former QTH in LA.

Dave, K8CC

Sent from my iPhone

> On Aug 8, 2017, at 8:10 AM, "john at kk9a.com" <john at kk9a.com> wrote:
> 
> Gain is a function of boom length however you need enough parasitic
> elements for the Yagi to work.  The MonstIR DB42 has a boom length of 42.5
> feet with four loop elements and two straight elements. This is the only
> MonstIR that I see on the SteppIR site so I am guessing that this is the
> antenna you are referring to.  Are only the loop elements motorized? 4
> elements on a 42.5 foot boom seem to be pretty big spacing for 20m and
> higher.  For example my homebrew 4el 20m OWA beam is pretty wide spaced
> and it only has a 32 foot boom.
> 
> John KK9A
> 
> 
> To:    cq-contest at contesting.com, k9yc at arrl.net
> Subject:    Re: [CQ-Contest] TH7 Replacement
> From:    Ria Jairam <rjairam at gmail.com>
> Date:    Mon, 07 Aug 2017 21:04:05 +0000
> 
> 
> I have had a SteppIR (MonstIR, the big one like what they had at 6Y1V).
> 
> Instead I will just enjoy beating them in the
> pileups since the 4 elements perform like 5.
> 73
> Ria, N2RJ
> 
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