Well, I've got part of the model in. Copied the dimensions from the QST
article and the developer's MA presentation..
Not getting a good match yet, nor the F/B... but it's probably some
little fiddling needed with dimensions, etc.
CM QST switchable
CM Ashraf Abuelhaija design
CM dimensions taken from slides Vortrag_MA_Abuelhaija_Ashraf.pdf
CE 20m
SY L = 5.3'wire length
SY DR = .00021 ' wire radiu (0.14 mm2)
SY Hc = 7 ' height of center
SY HE = 4.35 ' height of wire ends
SY Y=4 'distance to side of antenna middle elements (fore aft Y=0)
SY X1=4.62/2 'distance fore/aft for middle elements
SY X=4
SY CL = 120 ' pf Load
GW 999 1 0.05 -0.05 HC 0.05 0.05 HC DR
'feedpoint
GW 10 50 0.10 0 HC X 0 HE DR
'wire #1
GW 950 1 -0.05 -0.05 HC -0.05 0.05 HC DR
'loaded element feed
GW 20 50 0.05 -0.05 HC X1 -Y HE DR
GW 30 50 -0.05 -0.05 HC -x1 -y HE DR
GW 40 50 -0.10 0 HC -x 0 HE DR
'wire #4, directly aft
GW 50 50 -0.05 0.05 HC -x1 y HE DR
GW 60 50 0.05 0.05 HC x1 y HE DR
GE 1
LD 5 0 0 0 58000000
LD 0 950 1 1 0 0 CL*1e-12
EX 0 999 1 0 1.0 0.0
GN 2 0 0 0 13.0 .005 0.0 0.0
FR 0 1 0 0 14.15 0.0 0.0 0.0
EN
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|