[Lowfer] Jay's K9AY ANT

[Peter Barick]

<<was Re: [Lowfer] WEB, WMS in CT >>

After viewing Jay's rendition of a K9AY ant., can it be said that it is a variant of a Loop of one turn? Or is something particular about that diamond shape?

Jay's configuration has 2x47ft long sides and 2x28ft sides, forming an elongated diamond. That amounts to 150ft C. and if a square would make a loop of 37ft SQ. Question: Might these two applications be equivalent antennas, correcting for effective height?

Observation 2: if that diamond were elongated more (same wire length) it would approach a shorted transmission line of W=>>0 and also approach a vertical (use imagination here...okay I'm being like Bill). Make sense to anyone? 

Also notice the coupling x-formers: FT 114-77s with the antenna side having almost 70 pri. turns. Yeeks, the winding! Given the inductance of a type 77 core, 70 turns adds up to mega inductance, no? Is there that muct reactance to deal with? Of course the design frequency is unknown, given that lashup, expect low LF capability desired.

--Peter
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>>> <jrusgrove at comcast.net> 02/07/09 8:04 AM >>>
Steve

A directional antenna...a large switchable K9AY that provides 20 - 25 dB front to back. Info here:

http://www.w1vd.com/k9ay11.pdf

I've used quite a few different antennas here over the years including e probes, 6' box loop, 10' 14 
turn Octoloop, large shielded single turn coax loops (both tuned and broadband), beverage (not long 
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