PCS Electronics EXTERMINATOR II User manual

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1
EXTERMINATOR II ®
87-108 MHz High Power VHF Broadca t Antenna
Manual

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2
I M P R T A N T N T E
Upon receiving your order inspect the packaging material and unit for apparent
damage. Any damage should be reported immediately so we can make a claim with
the shipping company. Take photos, if you can, they can be used as a proof.
Although we tune antennas for our customers, it is strongly recommended that you
verify tuning once antenna is installed. bjects around the antenna can affect the
tuning.
This is a narrowband antenna so changing frequency requires retuning with a
suitable instrument (antenna analyzer or SWR meter).
Antenna is shipped in a collapsed state! Extend both sections of the telescopic
main antenna pole until the black marker ring shows, than tighten the clamp.
The SWR on the antenna can only be tuned in a free transmission zone, if you are
broadcasting close to another antenna with powered transmitter this will have
undesirable results and you will not be able to find the perfect tune, remember to
turn off any transmitters or find a suitable location that is not close to an antenna
used for broadcasting.
D A N G E R !
WARNING BE AWARE THAT ERECTING ANY ANTENNA CL SE T R NEARBY
ELECTRICAL P WER LINES CAN LEAD T SERI US INJURY AND P SSIBLE
DEATH! BE VERY CARFEFUL!
D N T TRANSMIT UNLESS Y U CAN C NFIRM THE ANTENNA IS MATCHED T
Y UR FREQUENCY!

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3
TABLE OF CONTENTS
INTRODUCING THE EXTERMINATORII®.................................................................................................. 4
W HAT ’ S NEW IN VERSION II.................................................................................................................................. 4
A DVANTAGES ....................................................................................................................................................... 4
T ECHNICAL SPECIFICATIONS ................................................................................................................................. 4
H OW MUCH ERP WILL MY TRANSMITTER HAVE WITH THIS ANTENNA ?................................................................. 5
T HANK YOU FOR PURCHASING E XTERMINATOR II® ANTENNA . ............................................................................ 5
BEFORE YOU START - INSTALLATION ADVICE...................................................................................... 6
ANTENNA CONSTRUCTION – PARTS & TUNNING INFORMATION.................................................... 7
TUNING INFORMATION .................................................................................................................................. 9
APPENDIX A – WARRANTY AND LEGAL INFO....................................................................................... 11
I MPORTANT NOTICE !........................................................................................................................................... 11
W ARRANTY AND SERVICING ! ............................................................................................................................. 11
L EGAL INFO ........................................................................................................................................................ 11
L IMITATION OF LIABILITY ................................................................................................................................... 11
ALSO AVAILABLE FROM WWW.PCS-ELECTRONICS.COM................................................................ 12
REVISIONS AND ERRATA ............................................................................................................................. 13
INDEX.................................................................................................................................................................. 13

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4
Introducing the EXTERMINAT RII ®
87-108 MHz High Power VHF Broadcast Antenna
The ExterminatorII is a powerful omni-directional FM Broadcast Antenna based on the successful Sirio shortwave
antenna with several important modifications and improvements. ExterminatorII® gives the same range as 2
vertical dipoles and when mounted on the top of a tower it gives close to perfect omni-directional pattern. Produced
to exacting standards using state of the art electrical and mechanical designs resulting in superior performance and
long service life.
The high build quality and DC short protection will provide peace of mind to stations who want to stay on air. ExterminatorII®
withstands the toughest environments. ExterminatorII® ships fully tuned and assembled and can be installed on your tower or mast
in a matter of minutes.
ExterminatorII® delivers a massive .1 dBi gain across the entire FM II Band. All RF hotspots are teflon/PTFE components with
specifications that exceed required ratings. Once tuned to your frequency the ExterminatorII® will never go "out of tune" and will
not be affected by rain unlike some other versions.
Remember to write your desired frequency during checkout at the time of ordering (under comments); we will tune your antenna for
you. You can always re-tune your antenna alone with antenna analyzer or SWR meter. Note that although antenna is tuned at the
factory it is often necessary to make a small adjustment depending on how installation is performed. Some parts may also move
slightly during shipping. Antenna ships in fully assembled form but the two telescopic sections are collapsed for easy transport. You
will only have to release two screws and extend the two telescopic sections all the way to the two black marker circles, than fix the
screws again.
What’s new in version II
- Significantly improved connector assembly, better than any other design out there at time of release.
- Improved gamma match, better than any other design out there at time of release.
Advantages
- Near perfect circular coverage when mounted on top of a tower/pole
- Matches or outperforms 2 dipoles
- Usually easier and also cheaper to mount than 2 dipoles
Technical specifications
- Frequency range: 87. - 108 MHz
- Max power rating: 9 0-1000W (N), 3KW (7/16) - 4kW (EIA)
- Impedance: 0 Ohm unbalanced
- Gain: .1 dBi (Upgrades 1KW TX into 2KW ERP TX)
- Radiation (H-plane): 360° omni directional
- Polarization: Vertical
- Connector: "N" - 7/16" DIN – EIA
- 6MHz Bandwidth at S.W.R. 2:1:
- S.W.R. at res. freq.: ≤ 1. :1
- Feed system: Gamma match v2
- Tuning: Arrives pretuned (retuning by length adjustment and gamma match adjustment)
- Tuning: Pre-Tuned / Whip Adjusting
Chapter
1

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Mechanical Data:
- Materials: Aluminum, Teflon, Copper, Nylon
- Wind load/resistance: 30 N at 2 0 Km/h / 230 Km/h
- Wind surface: 0.28 m2
- Height (approx.): 3, m max
- Weight (approx.): , Kg
- Mounting mast: 40mm
How much ERP will my transmitter have with this antenna?
1KW transmitter: Your ERP will be increased by 3dB (2x), 1KW transmitter will give 2KW ERP.
Thank you for purchasing Exterminator II® antenna.
We hope you will enjoy it as much as we do and remember to tell your friends about it. Please feel free to leave your
comments at our website or post your experience in our forum. From all of us we wish you happy broadcasting!
Your PCS Electronics team
DANGER
DO NOT ERECT CLOSE
OR NEAR HIGH
VOLTAGE POWER LINES
THEY CAN KILL YOU!

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6
BEF RE Y U START - INSTALLATI N ADVICE
WARNING - BE AWARE THAT ERECTING ANY ANTENNA CLOSE TO OR NEARBY
ELECTRICAL POWER LINES CAN LEAD TO SERIOUS INJURY AND POSSIBLE
DEATH! BE VERY CAREFUL!
NO SWR/POWER METER OR ANTENNA ANALYZER? GET ONE OFF OUR WEBSITE!
DO NOT TRANSMIT UNLESS YOU CAN CONFIRM THAT THE ANTENNA IS
MATCHED TO YOUR TRANSMIT FREQUENCY!
1. Always make sure the installation area is free and clear of power lines.
2. If possible it is recommended to check the antenna’s tune prior to erecting on your tower/mast; this can be
achieved by ensuring the antenna is raised at least 2 meters above the ground free and clear of other mechanical
objects.
3. Always reduce or extend telescopic sections in equal amounts to find the perfect tune, the gamma match should
remain in its original position however if you move to a frequency that is MHz higher or lower than the factory
tuned measurement then you need to follow the gamma match tuning instructions.
4. The SWR on the antenna can only be tuned in a free transmission zone, if you are broadcasting close to the
antenna this will have undesirable results and you will not be able to find the perfect tune, remember to turn off any
transmitters or find a suitable location that is not close to an antenna used for broadcasting.
. After you have erected the antenna on your tower/mast and connected to your transmitter/amplifier begin to
operate at low power—check the SWR anything below 1: :1 is acceptable, above 1: :1 the antenna needs to be fine
tuned.
6. Once you are satisfied that the antenna is matched to your frequency begin to increase RF power slowly until you
have reached your pre-determined output, during these power cycles continue to monitor the SWR.
Chapter
2

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7
ANTENNA C NSTRUCTI N – PARTS & TUNNING
INF RMATI N
ANTENNA CONSTRUCTION—PARTS & TUNING INFORMATION
If it becomes necessary to re-tune the antenna you must read and understand the antenna’s characteristics and
components this will also assist us in the event you require telephone/e-mail support.
The Antenna i made up of the following part :
1. Center / Main Section - the center/main section of the antenna forms the heart and soul of the Antenna it also
facilitates an effective method to mount the antenna to your tower/mast/pole with two clamps.
2. At the lower part of the main ection you will note the aluminum “HUB” (see figure 1) the length of
aluminum tubing below the hub is used to mount the Antenna to your mast/tower/pole; the hub must remain free
and clear of any other object.
3. Bolted to the hub are 4 x 1/2” aluminum tube that ri e to form the i otropic ring, this section is always pre-
assembled at our factory however it is wise to check the nuts and bolts are tightness. (Do not over tighten)
4. The hub incorporates the eyelet for the “gamma match” y tem (see figure 2). Due to various applications
gamma matching systems may vary.
5. The gamma match is pre-tuned to provide maximum performance for your desired frequency, in the event you
need to re-tune the antenna the gamma rod may require a slight adjustment, IMPORTANT if you do have to alter
the position of the gamma rod do this in millimeters, a small movement in either direction will yield big results.
6. Nylon hub is locked into place by a set screw; remember to unlock the set screw if you need to relocate the hubs
position. This nylon hub is keyed to accept the 4 nylon stabilizers, insert each stabilizer at an angle then push into the
keyed/slotted position on the nylon hub.
7. Each tele copic ection hould be extended to the indicated marker ring, (section #1 is the main element that
holds the hub) section #2 and #3 are secured by clamps, do not over tighten the stainless steel clamps as it may strip
the gear.
Fig. 1: The antenna construction. Note N connector ships already soldered, you only need to solder it if you purchase KIT.
Chapter
3

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8
A embly & Tuning
1. There are everal procedure to obtain a perfect tune—always keep in mind; lower frequencies require a longer
antenna, higher frequencies require a shorter antenna.
2. Your Antenna will arrive factory tuned in some cases you may need to re-tune the antenna to a new frequency;
the secret to tuning the antenna is a little patience.
3. The initial a embly, the antenna arrives in several parts and consists of the central section/main element
“section #1”; the second part consists of 2 telescopic aluminum tubes that fit snugly into each other.
4. Extend the ection to their marked position now lock up these sections with the hose clamp/screws provided,
this should complete the initial assembly.
. Tuning the Antenna con i t of two inherent element the central element (telescopic sections) and the
gamma match. Antenna arrives pre-tuned by default.
6. USING AN ANTENNA TUNER—WE RECOMMEND YOU TO PURCHASE THE RIGEXPERT
AA-170... Begin by unscrewing the clamp that secures section 2 just enough to allow you to move the tube, if you
are going up the FM band then reduce this section a few cm - now conduct a SWR sweep, continue making
adjustments to sections 2 and 3 until you obtain the best reading at your new frequency. If you are unable to produce
a reading of 1: :1 or below you may need to fine tune the gamma matching system. (See paragraph 8)
7. TUNING THE ANNTENA WITH YOUR SWR METER... While tuning your antenna alway
remember to et low power! No antenna tuner? Not to worry identical results can be achieved by following the
same principals in paragraph 6, except with an SWR meter it may takes a little more time.
8. GAMMA MATCH TUNING…… If you cannot obtain 1. :1 or below on your new frequency by following the
above you may need to alter the position of the gamma match rod. (see figure 1). First loosen the nuts on the U bolt
that secures the gamma rod to the upper bracket (the shorting strap to the main section), next loosen the hose clamp
that secures the Teflon/gamma rod in it’s gamma tube, IMPORTANT the gamma matching system is highly
sensitive you should move the gamma rod up and down in millimeters (SMALL ADJUSTMENTS EQUAL VAST
DIFFERENCES) each time you move the gamma rod check your SWR, if it goes higher then go in the opposite
direction, continue to make small changes until you discover the best SWR. By taking your time and following these
directions you should find tuning/retuning the antenna is in fact very simple, of course if you run into trouble we are
always here to assist you.

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Tuning information
The antenna is an advanced design that delivers excellent characteristics across the entire FM band. ExterminatorII®
delivers performance that rivals a 2-bay multi stacked phased array. To achieve maximum results the antenna should
be mounted as high as possible, clear from all other obstructions. We have included a pack of U-Bolt brackets to
provide for easy mounting. If you are mounting the antenna on a mast/tower with other equipment the antenna
must be set at least 3 meter or one wave length from any other antenna.
For tuning use a meter designed for the intended frequency band. Preferably use antenna analyzer such as RigExpert
AA-170. If you have to use SWR meter, do not attempt to measure SWR at high power levels; resulting high SWR
could damage the transmitter and is also exposing you to unnecessarily high EM field. Do not touch any parts of the
antenna when reading SWR. Also move as far away from the antenna as possible during measurements. If you are
tuning the antenna on the ground you must ensure the antenna is at least 2 meters above ground level to minimize
impact of ground on the readout.
Primary tuning is done by setting the length of the main element equal to .82 wave of your operating frequency. This
is measured from the lower edge of the aluminum hub to the tip of the main element; the main element is made up
of three (3) tubular sections. The first element is the “main” section that secures the antenna components, the
second and third elements are adjustable and can be extended / retracted.
The correct length of the main section (elements 1, 2 & 3 combined) is calculated in inches by using the formula of
9212 divided by your frequency in MHz Example: 104.1MHz would be 9212 / 107.1 = 88.4 inches. Remember
measure from the lower part of the main aluminum hub, do not include the length below the hub with connector,
this is for mounting purposes only and is not actual accurate antenna’s tuning which can only be done with a SWR
analyzer or meter.
Frequency: Extend To:
88MHz = 2,66m (104.6 inches)
90MHz = 2,61m (102.3 inches)
92MHz = 2, m (100.1 inches)
94MHz = 2,49m (98.0 inches)
96MHz = 2,44m (9 .9 inches)
98MHz = 2,39m (94.0 inches)
100MHz = 2,34m (92.1 inches)
102MHz = 2,29m (90.3 inches)
104MHz = 2,2 m (88. inches)
106MHz = 2,21m (86.9 inches)
108MHz = 2,16m (8 .2 inches)
The next adjustment is measured by the length of gamma rod set into the lower portion of the captive tube (air-
capacitor). Further adjustment is determined by the location of the gamma rod and the bracket. Moving the bracket
up and down will change inductance; this sets the balance between the inductive and capacitive components that
make it possible to produce the correct resonance and a flat 1:0 SWR. When both the inductive reactance and the
capacitive reactance are equal at your frequency they will cancel each other out and present 0 Ohm resistive load to
your transmitter.
We have set the “shorting strap” (the part where the gamma rod is secured to the main element) to its optimum
position, under most conditions you should not need to re-position this part.
Chapter
4

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10
The length of the gamma rod determines the “fine tune” once you have extended the main element to match your
frequency the next step is to release the u bolt and the hose clamp to allow adjustment of the gamma rod.
IMPORTANT: The gamma rod is very “SENSITIVE” to change, do not move the GAMMA ROD more than 1-
2mm during the fine tuning phase. When tuning the gamma constantly check your SWR meter. Continue to make
fine adjustments to the GAMMA ROD until you achieve the best SWR reading. In the event you cannot achieve
better than 1. :1 the next step is to revisit the main element length, extend the main element 1 cm, check SWR if it
increases then go the other way until you find the best position. In any event an SWR reading of 1. :1 or less is
acceptable.
Once tuning is complete, lock all nuts, bolts and clamps, make sure to seal the exposed metal parts of gamma
assembly with a coating of included silicon grease (do not use the type for bathrooms/kitchens), especially the part
around the connector. When screwed together the grease is compressed and forms a weather proof seal. Do not use
electrical tape it cannot keep moisture out!
We are always available to assist you by e-mail send your enquiries to rad[email protected]om
Fig. 2: The telescopic sections before extension

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Appendix A – Warranty and legal info
Important notice!
Plea e remember to turn off the tran mitter/amplifier when not in u e! This goes especially for high powered
transmitters. Remember that anything you broadcast through the transmitter can be heard by anyone tuning in to that
frequency. Although it is unlikely certain weather conditions may allow the signal to go further than your immediate listening
area so please don't broadcast anything you don't mind anyone else hearing.
Warranty and servicing!
Within one (1) year of receiving your order, if any product proves to be defective; please contact us via e-mail or our
feedback form. Please DO NOT ship the product back to us without contacting us first and receiving return instructions.
After we receive the defective merchandise, we will test it if need be, and we will ship back to you a non-defective
replacement product. Please note that this doesn't cover final RF transistor as it can be damaged by using defective or poorly
matched antenna. An exception is as well any mishandling or abuse by the customer. If the product is defective, you will
receive a replacement. If you choose to return the defective item, rather than replace it, we will charge a 20% restocking fee
and your original shipping and handling charges will not be refunded. The return of the product is at your expense. We
believe that this is a fair policy because lower overhead results in lower prices for all of our customers.
Legal info
It may be illegal to operate this device in your county. Please consult local authorities before using our products! PCS
Elektronik d.o.o. is not responsible for any damage to your PC arising from use of this product and will not be held
responsible for any violation of local laws pertaining to the use of this product. It is entirely your responsibility that you make
sure you operate in accordance with local laws and/or regulations.
Limitation of liability
To the law, in no event shall PCS Elektronik d.o.o. or its suppliers be liable for any special, incidental, indirect, or
consequential damages whatsoever (including, without limitation, damages for loss of business profits, business interruption,
loss of business information, or any other pecuniary loss) arising out of the use of or inability to use the PRODUCT, even if
PCS Elektronik d.o.o. has been advised of the possibility of such damages. In any case, PCS Elektronik d.o.o.´s entire
liability under any provision of this agreement shall be limited to the greater of the amount actually paid by you for the
PRODUCT or U.S. $ .00; because some states and jurisdictions do not allow the exclusion or limitation of liability, the
above limitation may not apply to you.
Appendix
A

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12
Also available from www.pcs-electronics.com
We also carry a big range of:
- FM transmitters in assembled and KIT form
- TV transmitters in assembled and KIT form, VHF and UHF
- AM transmitters with extremely clear modulation (PWM design)
- Various accessories for professional and hobby FM radio stations
- A large assortment of hard to obtain RF components (RF transistors; MRF, 2SC, coils, silver plated wire, coaxial cable,
capacitors, quartz crystals and many others)
- PC based FM transmitters (PCI MAX pc based FM transmitter turns your PC into a radio station)
- A large number of beginners guides to get you started
- A large selection of free schematics is as well available at our website.
If you can’t get much range with your homebrew antenna, have a look at these: http://www.pcs-electronics.com

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13
Revisions and errata
V3.0 (August, 2017): Updated version
Please report any errors you see in this manual, you will be helping us and many other users out there. Thank you!
Index
C
construction .......................................................... 7
G
gamma match ......................................................... 8
gamma rod ........................................................... 10
I
installation.............................................................. 6
P
power lines ......................................................... 5, 6
S
silicon grease........................................................ 10
specifications.......................................................... 4
T
tuning ................................................................ 8, 9