YO File for 20 & 15 meter yagis

[Frank Donovan]

Hi Chuck,

Here is the YO file for my 20M 5 element Yagi on a 48 foot boom.  I have
five of these antennas and they work great!  This is a compromise design
for CW and SSB, with good gain, F/B and VSWR across the entire band.  I'll
send the YO file for my 6 element 15M Yagi separately.

73!
Frank
W3LPL
donovanf@sgate.com

Yo file follows:
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W3LPL 5 Element 20M Yagi 48 Ft Boom
Height 2340.000
14.000 14.250 14.350 MHz
5 elements, inches
            1.2500    1.1250    1.0000    0.8750    0.7500 
  0.0000   33.7500   50.2500   33.0000   33.0000   67.0000
 86.0000   33.7500   50.2500   33.0000   33.0000   53.5000 
171.0000   22.0000   47.8750   33.0000   33.0000   63.5000 
349.0000   22.0000   31.2500   33.0000   33.0000   77.0000 
570.0000   22.0000   43.7500   33.0000   33.0000   52.0000 

Use the M and Tab keys to enter the following 
T-match parameters: 
Rod diameter:   0.5"
Rod Spacing:      6"
Rod Length:      48"
Lead Length:      3"
Series Cap:   99999 pf
Feed Z          200 ohms

Experience indicates that the driven element
tip must be lengthened to 62 inches, the
length that produces a modelled impedance of
+j20 ohms at 14.200 MHz
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On Tue, 18 Feb 1997, C. Logan Dietz (KE5FI) wrote:
> I am struggling with a design for a 20 meter yagi on a 45 foot boom.  
> Nothing I try with YO seems to "look good" to me.  I thought that if I 
> started with a proven file I might arrive at better results.
> What kind of gain does YO show for your 5 el 20 on the 48' boom?
> Chuck, KE5FI


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