C
) The following procedure is used for the
tuning of the 40 channels CB-band Radio in
the range of:
CH-1 = 26.965 MHz
to
CH-40 = 27.405
MHz
with
CH-19 = 27.185 MHz
as centre
band for
EU Frequencies.
E
) If all SWR results are very high (more than 3)
probably there’s a short circuit in the cable or
your antenna is defective. To avoid
damages to your CB transceiver DO NOT
use it until the problem is rectified.
G
) If the SWR result on CH-1 is lower than CH-
40 your antenna is electrically TOO LONG and
you should slightly cut the radiator by 10mm
at a time. Avoid cutting too much. As long as
you get the same values on CH-1 as well as
CH-40.
Select CH-1 on your CB-transceiver and take
an SWR measurement, writing down the
results.
Transmit only for a few seconds
because in case the SWR is too high the
transceiver could be damaged.
F
) If the SWR results are the same on CH-1 and
CH-40 and the lower value is on CH-19, your
antenna doesn’t need any tuning.
D
) Repeat the procedure for CH-19 and CH-40
CH-1 = 27.601 MHz
to
CH-40 = 27.991
MHz
with
CH-19 = 27.781 MHz
as centre
band for
UK Frequencies.
H
) If the SWR result on CH-40 is lower than CH-
1 your antenna is electrically TOO SHORT and
you need to pull out the radiator as long as
you get the same values on CH-1 as well as
CH-40.
REMARK
Some antennas can be tuned only by
adjusting special rings, nuts or screws
so you can follow the above
procedure but you don’t need to cut or
extend the radiator.
INSTALLATION
1) Hole mount installation
B
) Connections: Position the cable in your
vehicle shortening its length according to your
needs. Connect the PL259-male to the cable
ready for the connection to the transceiver.
E
) Suggestion: After the final installation and
BEFORE connecting your transceiver, we
recommend an electrical continuity check
between the nut of the PL259 and the ground
of your vehicle.
A
) Hole Drilling: Chose the position on your
vehicle (centre roof is recommended) and drill
a hole according to the mount diameter.
Please ensure a good electrical ground contact
is made.
TUNING
REMARK S: As some antennas are in short
circuit and it would be impossible to do the test
after the installation, we recommend you test
the cable prior to connecting the antenna.
Most of the antennas are factory tuned and
don’t need any extra tuning, but in case of fine
adjustments we recommend to follow the
procedure below:
A
) To perform a correct test, move to an open
space far from metal parts such as metal doors,
buildings, towers, gates etc. at minimum 50
metres or more.
B
) Connect your SWR-meter between the
antenna connector and your CB transceiver
(follow the instructions of your SWR-meter for
the correct use to your equipment).
C
) Electrical Tests: Ensure there is no short
circuit between the central pin and the nut of
the connector. Ensure there is electrical
continuity of the cable from the central pin
(connector side) to the central contact
(antenna side). Ensure there is electrical
continuity of the cable from the nut (connector
side) to the ground (antenna side)
D
) Installation: Pay attention to securing all
screws and nuts during the final installation.
B
Copyright
SIRIO antenne
- Technical Data are subjected to change - Printed in ITALY - Rev. 22/05/2017 - Cod. ID452
CB & 10M Trucker Antenna
INSTALLATION AND TUNING INSTRUCTIONS
HI-QUALITY ANTENNAS MADE IN ITALY
antenne
SIRIO
S
3500 or 5000 Watts Low Loss Coil
·
Stainless Steel Shaft 8” / 200mm
MAIN FEATURES
Very High Power Center Loaded Trucker Antenna
·
48mm/1.9" use 3mm/9-AWG wire without soldering
·
Low loss high ”Q” air wound coil design of
·
Fully Designed & Manufactured in Italy
·
BULL Trucker 3000 3/8: Overall height 1.6m/5.2'
- 3500 Watts (CW) Power Handling Capability (ICAS)
·
Use as a single antenna or twin co-phased
- Wide Bandwidth up to 1.9 MHz at SWR=2.0
- Whip length 1.3m/51” 17-7PH SS 3mm Tapered w/
metallic cap
metallic cap
- Whip length 1.5m/59” 17-7PH SS 3mm Tapered w/
·
BULL Trucker 5000 3/8: Overall height 1.8m/5.9'
- Wide Bandwidth up to 1.5 MHz at SWR=2.0
- 5000 Watts (CW) Power Handling Capability (ICAS)
·
Exclusive LED PCB that’s light Up when transmitting
points, all screwed on
Optional “CB-HDS”
3/8 to SO-239
P/N 2508106.00
3/8"
