I think the antenna is a big capacitor formed by the antenna as one of
capacitor’s plate ,the big tower plus antenna clamps are the other
capacitor’s plate,this gives a lot of capacitance that is changing the
antenna’s frequency of resonance,it is better to separate the dipole from
the tower which now is only 1 inch.
Insulated plate and clamps are a must!
Fernando,XE2FL
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Saludos Cordiales,
Ing Fernando Muguerza
EQUIPOS INDUSTRIALES Y EDUCATIVOS
Cel:811 589 2930
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