PRO.SIS.TEL. PST-27 Installation guide

Vertical HF WARC bands trapped antenna PST-27 / PST-273VC - VF
Assembling instructi ns:
After unpacking antenna, you will find the main antenna tubes pre-assembled already, following
diameter steps.
Tilting it down, do in the way to have all tubes heads coming out from the main tube.
Assembly them as in the picture below.
Lightly lubricate the threads f all b lts bef re installing (the steel tends t be nailed very easily).
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 and rests on the inner tube as show fig.1.
Tighten the nut. Make sure that all bolt heads are on the same side.
Using the same way, e tract 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.
When all diameters are assembled, insert the 12m trap and terminal tip. Traps have two drainage
holes that need to look down.
If you bought the version with 30m, also enter the 17m trap and lock it in the same way.
All the sections of tubing and the tip, have multiple holes that serve to make small tuning touches
on the various bands. Some parts are pre-assembled and pre-calibrated, if needed remove the bolt
and move the tuning point. Calibrate the antenna starting with the highest band and proceed to the
lowest bands. Longer elements lower frequency, shortening elements 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 8 bolts 4 25MA in the holes in X shape and 4 16 bolt in the side hole as pictures.
Correct assembling sequence for all the bolts: bolt, serrated washer, normal nut, two flat washers
and self-locking nut. Bl ck all tightening b lts th r ughly n rmal nut.
Continue the assembly with the two insulators in which is placed the wider pipe section 35mm.
Leave loose bolts so you can easily move the tube into its final position with the lower side
protruding appro imately 2cm from the insulator. Install on the radial 4 20MA bolt and lock, insert
a flat washer, eyelet RF wire, another flat washer and normal nut. Lock bolts of isolators and
assembling the RF choke coil (choke). Making sure that the chock is vertical for a better drainage of
the rain. The choke will short to ground any electrostatic discharge and will reduce noise.
The care and precision of this assembly will ensure a long life to the antenna.
Check that all bolts have been properly secured and completed the radiator assembly.

With the aid of the U bolts, install the base on the supporting pole and install the solid radials.
The U bolt is 50mm wide, it can get poles or tubes from 40 to 50mm.
If radials rows being installed, take care doing the work as they can also heavily influence the final
tuning. You may have to try to attempt the best point of risonance.
If you have chosen the version with solid radials, they must be installed on the two bolts that are
located under the base plate, taking care to follow the order for bandwidth, in order from highest to
lowest or vice versa. Each radial has an adjustable tip that allows small frequency change for each
band.
When assembled antenna will looks like the one in the pictures .
Antenna with solid radials can be installed at any height. Version with wire radials will have
greater performance if installed 10-20cm over the ground with radial on the soil or roof.
Before to rise up antenna in the sky, make sure that all bolts and connections are well tightned.
D n t use guy wires, d n t seal traps and tubes j ints.
Specificati ns:
PST-27VC/VF = 12-17m
PST-273VC/VF = 12-17-30m
Gain = 0 dBi
Impedence = 50 ohm
Maximum power: 2KW pep SSB, 1KW CW- TTY
OS = Within 1:1,5 at center band
Lenght = about 3,7m or about 5,5m (3 bands version)
Weight = about 5-6 kg
Material = alluminum Al 6060 T6 stainless steel hardware

SWR diagram f r each ne band.
N te: antenna could be influenced on all bands or on some one band from local environments.
If possible avoid to install it close to metal object parallel to antenna radiator.
If necessary, start the tuning operation from the higher band and step up moving to the ne t band.
12-17m tapering
115cm 115/105 cm 75/65cm 10+45cm
35mm 30mm 25mm T12m 16+10mm
12-17-30m tapering
115cm 115/105 cm 75/65cm 20+60+95cm
35mm 30mm 25mm T12m T17m 16-12-8mm

Solid radials tapering
65cm 22cm 65cm
12m
12mm 8mm
65cm 22cm 75cm
17m
12mm 8mm
65cm 22cm 65cm
30m
12mm 8mm
The antenna length can change in acc rding with setting and/ r p ssible envir nmental influences
Specifications ma change without notice.
Warning:
Do not install the antenna near power lines or equipment that could result in electrical contacts. You
could be seriously injured or killed.
The antenna must be installed in accordance with / local / national laws.
If necessary get a professional installer.
Prosistel can not be sued for damages for non-compliance of equipment rules.
Dear customer,
thank you for purchase a Pro.Sis.Tel. if you are happy with it please talk to everybody, if you are unhappy
with it please talk with us.
Your feed back and suggestions, will be very appreciated, to improve our products.
Annamaria Fiume
IK7MWR
MADE IN ITALY
Protect our environment, in case of discontinuing of this unit, consign it to specialized
metal waste collector.