A j-pole build process for GMRS frequencies (462.550MHz - 467.725MHz)
Plexiglass bridge between "J".
Description
:
Plexiglass bridge is glued between the elements of the "J" using contact cement. This will help keep branches and such outside the "J" elements. Before the bridge is in place, the lenght of the "J" element is measured and the extra lenght is trimmed off so that the lenght is 1/4 wave adjusted for the velocity factor of the steel. In this case, I used .95 for the velocity factor.
Location
:
Mecworks R&D Lab
Photographer
:
Marc Christensen
Copyirght
:
Marc Christensen (C) 2004, no use without express written permission.
