Original article from: Wayne Sarosi 
 Reposted by Rob Dennis,Moderator HAM_TECH,for use of the FIDO HAM_TECH echo.
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LPA Series - 50-54 MHz
USE:  Amateur Band 6m
Note: See ARRL Antenna Handbook under LPA construction
Tau = 0.92
Sigma = 0.17
B = 1.08
COT alpha = 8.5
BAR = 1.42
Bs = 1.534
Lambda max = 19.68-ft
Lb = [0.25(1-(1/Bs))COT alpha)Lambda max] = 14.75-ft
N = 1 + (log Bs / log (1/Tau)) = 6
The following are in inches, two of each required (L)
------------------------------
 L1 = 59.94               d1,2 = 40.97
 L2 = 55.22               d2,3 = 37.69
 L3 = 50.90               d3,4 = 34.67
 L4 = 46.90               d4,5 = 31.90
 L5 = 43.20               d5,6 = 29.35
 L6 = 39.81
Zt = 29.52  Sigma' = Sigma/sqrt Tau = 0.17723
Ro = 50
Zav = 200.7 using 0.35 dia elements
Zo = Ro^2/(8(Sigma'(Zav))) + Ro(Sqrt(Ro/(8(Sigma'(Zav))) + 1) = 63.0
Gain = 8.5 dBi
S can be calculated from the ARRL Antenna Handbook.
Next is the element attachment.  SEE BELOW!!!!
*************************************************************
*    NOTE: The boom on all these LPAs is 1-inch diameter.   *
*    All elements have a 0.9-in adjustment in the length    *
*    to compensate.  Sorry about that.  The Freq file will  *
*    have the proper statement put in.                      *
*************************************************************
-WS
--- GoldED 2.42.G1219
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