Below in a communication from CHUCK at Tennadyne I am soon to install a T 620 - his is a 6 el LOG YAGI for 20m only ( = discontinued model) on 27 foot boom - it has 4 el in LOG cell, and director and
I totally question the veracity of anyone that claims a cubical quad with the exact same dimensions as a yagi has more gain. It's just not true. Force 12 dispels this myth on their website. 73, Jon N
Not exactly. Having just read the piece on the F12 Web site about quads and yagis, Tom points in a rather circumspect manner to some unnamed research. He does correctly point out that the flaw in com
Hi Jon; Consider the full wave Quad has about 1.8 db more gain than a 1/2 wave Yagi. The Quad is quieter on receive and does not hear rain static. The efficiency of the average 3 el Quad is in the 90
where is this from? a given, while I have never done a side by side this is an agreed upon benefit og the quad sez who? sez who?? I assume these are based on the above presumptions ...uh oh - time to
It was written: Really? Then will the yagi elements sag from the tremendous heat build up within them? Never have seen that. Do they glow a dull red at night; would very soon after 500 watts was bein
Seems like I recall that an erstwhile towertalk regular reported a few years ago testing a KT-34XA trap in a homemade calorimeter to measure the loss actually dissipated as heat. The number he came u
You can actually model the conductor losses in a Yagi (or quad for that matter) using NEC. You will find that the difference between aluminum tubing and a perfect conductor is typically a very small
Yeah, but a yagi looks like a big TV antenna...a quad looks much, much more cool... Jerry K3BZ You can actually model the conductor losses in a Yagi (or quad for that matter) using NEC. You will find
In his 2 volume pair of books on Quads, Cebik shows that Quad efficiency can be improved significantly by using 1/2 inch tubing conductors. He looked at accomplishing the same improvement by using 2
HUH? The stacking gain for two *straight* half wave elements spaced 1/4 WL (the spacing of a square loop) is 1.0 dB as shown in the ARRL Antenna Book. Turn the ends towards each other and the gain dr
AO shows my 6el monobanders to be 98.9% efficient. Where does this 50% number come from? John Hi Jon; Consider the full wave Quad has about 1.8 db more gain than a 1/2 wave Yagi. The Quad is quieter
You forgot the only real advantage of a 2 elements quad over a 2 elements yagi, a better F/B. All the rest about gain, efficiency and take off angle is a pure mith, just like when an antenna manufact
Hi All: I knew I would draw a few tough critics on tower talk. I do not have a 33 million dollar test range. All of my testing is hands on comparisons. I just moved to another location and all of my