[TowerTalk] Hi-Tech Station Cost (>QUADS)

[n4kg@juno.com]

N4KG responses intersperced below

On Wed, 24 May 2000 23:19:34 -0400 "Paul Christensen"
<paulc@mediaone.net> writes:
> > Lindsay made his models around 400 MHz where the
> > matching efficiency to his quads was better than to his
> > Yagi's.  Today's concensus is closer to 1 dB.  See the
> > chapter on loop antennas in the W2PV Yagi Antenna Book.
> 
> There's a lot of information in the literature and it's becoming 
> more difficult to ascertain what is valid and accurate.  In the past 
> week, I have discovered as much MISINFORMATION concerning 
> the performance of  quads v. Yagis as I have with respect to 
> transmission line theory.  I suspect  that  much of the inconsistency 
> through the years can be attributed to a  lack of
> standardized and generally-accepted measurements and procedures.  
> What assurance do we have that the W2PV information valid?  
> Further, what  makes a consensus in this case?

	QSL on MISINFORMATION and procedures.
	It has taken many iterations to improve the
	models for Quad elements.  The 2L Quad
	has to be one of the best short boom antennas
	ever made.  Longer Quads seem hard to tune
	for optimum gain.

	Models for Yagi's have evolved to a high level
	of acceptance.  If you look at the stacking gain
	for 2L Yagi's (or dipoles) at 1/4 WL you will find
	gains closer to 1 dB.  One would ASSUME that
	Quad elements which can be thought of as
	stacked dipoles at 1/4 WL spacing with the ends
	folded towards each other would not exceed the
	gain available from straight elements stacked
	at the same distance.  N4KG
> 
> >Are you sure that John B A T T I N, K9DX, uses quads?
> 
> No, I always make a point of stating a fact when I'm not sure (?).  
> Yes John B A T T I N, K9DX was using his Cubex Mantis quad 
> when I worked him  last Thursday night on 40-meters while he
> was running 1KW.  Need further  proof?
> Multiple images of his Mantis installation are available at:
> 
> http://www.cubex.com/pho.htm
> 
> -Paul, W9AC
> 
	Sorry about that.  John confirmed that he removed
	his KLM 3L40 and high band Yagi's, replacing them
	with the Cubex Quad as you reported.  He also
	stated that the 40M 2L Quad seemed to be an 
	improvement over the short-boom loaded element
	Yagi.   I'm not surprised.  For several years I used
	a 2L Delta Loop on 40M, fixed towards 60 degrees.
	It was a KILLER antenna.  On 40M SSB, I was able
	to CQ into Europe and most hunt and call contacts
	took only one call, just N 4 K G, no repeats, no phonetics.
	My CC 2L40 works well on CW but no where near as 
	well on SSB (since it is tuned for CW).   The Delta Loop
	was suspended from a 20 ft boom at 120 ft with pulleys 
	at each and a continuous rope loop to enable elements
	to be attached at the tower and pulled into position.	
	Small (1/8 inch) nylon cords were used to pull out
	the bottom corners.  At 60 degrees, it coverel all of
	Europe, Middle East, and Africa.   Falling trees
	following a small tornado took it down.   de  N4KG


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