PRO.SIS.TEL. PST-20VF Assembling Instructions

Vertical HF monoband antenna PST-20VF
Assembling instructions:
After unpacking antenna, you will find the antenna tubes in the main lower tubes Od 30mm pre-
assembled already in a telescopic way, following step down diameter.
Tilting it down, do in the way to have all tubes heads coming out from the main tube.
The fastening of the elements takes place by inserting the bolt from the wider hole side so that the
bolt cylindrical head passing thoroughly, sit and rests on the inner tube.
Assembly the telescopic tubes joints as in the picture below.
Lightly lubricate the threads of all bolts before installing (the SS tends to be nailed very easily).
Tighten the nut. Make sure that all bolt heads are on the same side.
Using the same way, extract and connect all sections, less than the larger diameter that has to be
assemblend before on the antenna base and then proceed to final assembly.
Some sections of tubing and the tip, have multiple holes that serve to make a fine tuning. Longer
element lower frequency, shortening element increase frequency.
After completing the assembly of the radiator, proceeding to the assembly of the base which
presents a whole series of holes, which have to be equipped and prepared following the pictures
sequence.
Install the 4 bolts 4x25MA (for wire radials) in the holes in X shape (inner bolts are used only in
the solid radials version). On one of those will take place one end of the RF choke eyelet terminal.
Correct assembling sequence for all the bolts: bolt, serrated washer, normal nut, two flat washers
and self-locking nut.
Lock all tightening bolts thoroughly normal nut. On this bolts will take place wire radial ends.
Continue the assembly with the two insulators in which is placed the wider and lower tube section.
Leave loose bolts so you can easily move the tube into its final position with the lower side
protruding approximately 2cm from the lower insulator. Install on the tube end a 4x15MA bolt and
lock it, insert a flat washer, eyelet RF wire eyelet terminal, another flat washer and normal nut.