Baluns and RF Transformers
Precision Baluns and Un-Un Transformers
Designed
by professionals for the highest performance and reliability, lowest loss, and
crafted from the finest materials and connectors available. We back them
with our lifetime warranty. Period!
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Model - MFG |
Impedance |
Type
- Power |
Frequency range |
Price |
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BALUNS |
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| W1JR-50-3
Array Solutions |
1:1 50 Ω |
Toroidal 5KW CW/ 10KW PEP |
3.5-60 MHz |
$91.00 |
| W1JR-50-1
Array Solutions |
1:1 50 Ω |
Toroidal 5KW CW/ 10KW PEP |
1.5-35 MHz |
$126.00 |
| W1JR-50-Q
Array Solutions |
1:1 50 Ω |
Toroidal5KW CW / 10 KW PEP |
3.5-60 MHz |
$96.00 |
| W1JR-50-1DIN Array Solutions |
1:1 50 Ω |
Toroidal 10KW CW/ 20KW PEP |
1.8-30 MHz |
$177.00 |
| EB-1
Cal-AV Labs |
1:1 50 Ω |
Beaded 2KW CW / 4 KW PEP |
1.8-30 MHz |
$45.00 |
| EB-2
Cal-Av Labs |
1:1 50 Ω |
Beaded 2 KW CW/ 6 KW PEP |
10 - 60 MHz |
$43.00 |
| EB-3
Cal-AV Labs |
1:1 50 Ω |
Beaded 10 KW CW/ 20 KW PEP |
14-60 MHz |
$260.00 |
| AS-200-3
Array Solutions |
4:1 200:50Ω |
Toroidal 5KW CW/ 10KW PEP |
3.5-60 MHz |
$91.00 |
| AS-200-1
Array Solutions |
4:1 200:50Ω |
Toroidal 5kW CW/ 10KW PEP |
1.8-30 MHz |
$126.00 |
| AS-200-Tuner Array
Solutions |
4:1 200:50Ω |
Toroidal 5KW CW/ 10kW PEP |
1.8-30 MHz |
$140.00 |
| AS-200-T-10K
Array Solutions |
4:1 200:50Ω |
Toroidal 10KW CW/ 20kW PEP |
1.8-30 MHz |
$375.00 |
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AS-25-3EB
Array Solutions |
2:1 25:50Ω |
Toroidal 3 KW CW/ 6KW PEP |
3.5-60 MHz |
$135.00 |
| AS-25-1EB
Array Solutions |
2:1 25:50Ω |
Toroidal 3KWCW/6KW PEP |
1.8-30 MHz |
$150.00 |
| AS-25-10K-SO
Array Solutions |
2:1 25:50Ω |
Toroidal 5KWCW/10KW PEP |
1.8-30 MHz |
$304.00 |
| AS-75-1
Array Solutions |
1.5 75:50Ω |
Toroidal 5KWCW/10KW PEP |
1.8-30 MHz |
$295.00 |
| AS-50-L1
Array Solutions |
50Ω Line Isolator choke |
Toroidal 5KWCW/10KW PEP |
1.8-30 MHz |
$93.00 |
| AS-300-1
Array Solutions |
6:1 300:50Ω |
Toroidal 5KWCW/10KW PEP
Guenella Current Balun 2 stage |
1.8-30 MHz |
$199.00 |
| AS-600-150W
Array Solutions |
12:1 Balun 150W |
Toroidal 150WCW/300W PEP |
1.8-30 MHz |
$95.00 |
| AS-600-500W
Array Solutions |
12:1 Balun 500W |
Toroidal 500WCW/1KW PEP |
1.8-30 MHz |
$129.00 |
| AS-600-1.5KW
Array Solutions |
12:1 Balun 1.5KW |
Toroidal 1.5KWCW/3KW PEP |
1.8-30 MHz |
$149.00 |
| AS-800-150W
Array Solutions |
16:1 Balun 150W |
Toroidal 150WCW/300W PEP |
1.8-30 MHz |
$95.00 |
| AS-800-500W
Array Solutions |
16:1 Balun 500W |
Toroidal 500WCW/1KW PEP |
1.8-30 MHz |
$129.00 |
| AS-800-1.5KW
Array Solutions |
16:1 Balun 1.5KW |
Toroidal 1.5KWCW/3KW PEP |
1.8-30 MHz |
$149.00 |
| BMP-4
Array Solutions |
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AS Series balun mounting plate |
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$14.00 |
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UN-UN Transformers |
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| AS-200-T-UN |
4:1 UNUN |
Toroidal 5kW CW / 10 kW PEP |
1.5 -60 MHz |
$140.00 |
| AS-75:50-1
Array Solutions |
75:50Ω |
Toroidal 5KW CW/ 10 kW PEP |
1.8-60 MHz |
$85.00 |
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Other Baluns & Xfmrs |
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| Custom Baluns and Transformers |
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Call Us To Discuss |
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Buy it now Click here
for price list and Shopping Cart
Balun manual
Why are the Array Solutions Precision
Baluns and transformers the
finest
Baluns and Un-Un transformers you can buy?
Answer - because of good
design engineering expertise, implementation, R&D, finest materials, extensive
testing in the lab, in and out of doors with thousands now sold, and experience of many severe antenna
requirements and challenging antenna loads.
If you really want to learn about serious balun design,
please buy the following book from CQ Communications or
the ARRL Bookstore and educate yourself about baluns. And please, don't
believe all you read on the web about these useful devices. There is allot of
bad information out there. On top of it all you can even build your own if you
like! No magic, just good design and practical applications in this book.
"Understanding, Building, and Using Baluns and Ununs"
by Dr. Jerry Sevick, W2FMI
Our baluns and Un-Uns are correctly engineered and tested as
discussed in this publication. They will not heat up under heavy duty
power, duty cycles, or stressing load conditions.
and................................ we back them up with a
life-time warranty!
This means your antenna will have the best patterns
possible, and will match the load perfectly over the frequency ranges you
need.
eHam.net reviews
I was using a DX Engineering 9 to 1 balun
that would saturate on 160 meters running 1,000 watts.
My antenna is a 450 ohm ladder line fed Off Center Caged half wave dipole,
with 3 wires and a one meter spacing, for 160 meters.
I talked to Jay, the owner of Array Solutions, he told me his balun,
AS-200-T would not saturate on 160 meters as the DX Engineering balun.
Jay was right no problem anywhere on any HF band running 1500 watts.
- KE7AMS
Up till now, balun manufactures have tended to be
behind the curve of what I call “honest representation” or simply truth in
advertising. Representation of the true power rating of their balun. Their
designs tend to be derivative, not original. In fact, if one desires to
jump into the arena of manufacturing RF baluns, all you need is the
closest ACE Hardware store for the PVC tubes and end caps along with some
cloths line eye bolts. Oh yes, mail order in some powered iron cores or
worse yet, ferrite sleeves and away you go. If you want to be a higher
power balun designer and manufacture simply buy larger PVC pipes and end
caps and paint the whole mess black. Rate them at some ridicules power
capability and wait for the orders.
Over the years I have been one of the fools ordering some of these “new
technology” baluns. It is comical to fire up the gud ole Collins 30S1
amplifier watch the SWR climb the longer your fist is at the key. 1500
watts PEP SSB … NO … 1500 watts CW or RTTY. In fact I have had a few of
these off-brand baluns actually start the melt down process.
Well enough of the bashing. We all should be relieved to know that the
company called Array Solutions is a true RF balun designer and manufacture
under the watchful eye of Jerry Sevick, W2FMI and Array Solutions chief
cook and bottle washer Jay Terleski, WX0B. Jerry Sevick is the author of
books and numerous RF balun articles in QST. Best of all, Jay, WX0B tells
the truth about his products.
I now running the Array Solutions balun transformer on two of the mighty
Zero Five 43 foot verticals. I also have one of the Array Solutions 4:1
balun transformers up at 70’ on an OFC Windom antenna. Unlike other copy
cat off-brand baluns the Array Solution baluns does not flinch at full
1500 watts from the masterful Collins 30S1 RF generator. Cool and steady
transforming ratios and performance is peace of mind with Array Solutions
baluns. Highly recommended! I wish there was a 10 out of 10 rating! Great
product indeed.
Dennis J. Had W4USR
|
Need more information? Read the letter below.
Recommended by Dr. Jerry Sevick, retired Bell
Labs Engineer and RF transformer engineer get his latest book "Understanding, Building and using
Baluns and Un-Uns" by Dr Jerry Sevick, W2FMI.
|
Dr. Jerry Sevick,
W2FMI on Array Solutions Un-Uns and Baluns
I would like to express my thanks to Jay Terleski, WX0B for continuing
the advancement of the transmission line transformer.
We have become somewhat of
co-workers, sharing information back and forth about how these efficient
devices work in the HF, MF, and VHF parts of spectrum.
He has done some recent experiments on new ferrite cores and found that
by reducing the number of turns the actual potential difference on each
turn is greater which increased the core loss. This means that the
losses in these transmission line transformers are voltage dependant and
not flux related.
The Array Solutions baluns use the J. Reisert, W1JR
technique which was developed in 1978. As I have previously documented
in my published books the Reisert balun which uses a low permeability
toroid core and a small but high powered transmission line is one of the
most efficient and elegant baluns ever devised. This is due to the
following:
·
An
efficient low-loss ferrite is used.
·
The
balun has sufficient choking reactance for the various low-frequency
requirements, in the Array Solutions versions you can chose them.
·
The
characteristic impedance of the coiled transmission line was the same as
that of the feedline, eliminating the extra transformer action of a
length of transmission line with different characteristic impedance.
·
The
balun is a form of Guanella’s two-conductor 1:1 balun, which is not
prone to core flux and, hence, saturations and the generation of
spurious frequencies.
·
It is
also not susceptible to mismatched and unbalanced loads as are the
Turrin and “voltage” baluns.
The use of a crossover winding in the Reisert balun has virtually NO
effect up to 100 MHz, which was the limit of my equipment. The idea that
the crossover winding introduces stray capacitances is not evident, and
in the Array Solutions design it is proven to be a non-factor. We don’t
see any affect of the crossover winding or inter-capacitance problems
from the windings themselves, since they are so carefully arranged in
this balun and not “scramble wound”. But the crossover winding does
allow a convenient way to allow Array Solutions to dress the cable to
the output bolts on the opposite end from the connector, and I suspect
that is why he has chosen to use this technique. This is an excellent
implementation of the W1JR design.
Not related to the engineering of this balun is the Nema 4X sealed box
that is used. What a perfect solution to keep moisture out of the
balun. You can take the cover off and review the design. They have
nothing to hide inside this well made product.
Jerry Sevick, W2FMI
April 30, 2005
|
Jerry Sevick, W2FMI with Jay Terleski, WX0B - Dayton 2004
Return Loss measured on a W1JR-50-1 Balun is shown below from 1 to 30
Mhz
5 KW 1:1 50 Ω W1JR Baluns
All Baluns are sealed in weatherproof Nema Boxes, with an SO-239 (or optional type N
or 7/16 DIN)
input connector and two #10 Stainless Steel bolt output connections. They have
weep holes drilled in the bottom of the boxes to allow condensation
evaporation. Holes should always be mounted downwards.
The standard 1:1 Baluns shown in picture below come
optimized for the following frequencies
1.8-30 MHz operation at 5 KW CW / 10 KW PEP
3.5-60 MHz operation at 5 KW CW / 10KW PEP
  1:1 Baluns
25 Ω balanced to 50 Ω unbalanced 2:1 Balun
These current baluns look exactly like the 1:1 W1JR Baluns above. They are used to
match Yagi 20-25 Ohm driven elements directly without the need for matching
networks, like gamma, T-match, or hairpin matching.
Rated for 3 KW CW / 6 KW PEP, these baluns offer the same quality as our
well known W1JR baluns.
Two models to choose from 3.5-60 MHz and 1.8-30 MHz
Click here
for price list and ordering information.
Quad or Dipole Balun (W1JR type) 1:1 50 Ω
A 50 ohm 1:1 Balun developed to fit perfectly at the feed point of quads
Key Benefits
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5KW CW rated (with N-connector). Very high efficiency. Will not heat
up like the typical "current" baluns using beaded coax. |
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1:1 is a great balun for dipoles or any other 50 ohm balanced antenna. |
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Polarity is marked to make stacking of antennas easy. |
|
3.5-60 Mhz |
Pricing and Ordering
Click here
for price list and ordering information.
5 KW 4:1 W2FMI Type Baluns 200:50 Ω
The standard 4:1 Baluns shown in picture below come
optimized for the following frequencies
| AS-200-3 3.5-60 MHz operation at 5 KW CW/ 10KW SSB Great for Log
periodic antennas |
| AS-200-1 1.5-60 MHz operation at 5 KW CW/ 10KW SSB Great for log
periodic antennas and other broad band approx 200 ohm antennas |
| AS-200-T 1.5 - 30 MHz at 5 KW CW. CCS Heavy Duty windings heavy cores, Ideal for
dipoles, or other antennas where a tuner is used to match the transmitter over
a wide range of impedances. For instance the multi band verticals or a
Zepp fed with ladder line. |
AS-300-1 300:50 ohm 6:1 Baluns
Pricing and Ordering
Click here
for price list and ordering information.
10 and 20 kW Baluns 1:1 baluns
AS-75-10K DIN - 75 Ohm Balun to 50 Ohm cable
The standard 1.5:1 Baluns shown in picture below come
optimized for the following frequencies
| 1.5-30 MHz operation at 5 KW CCS / 10KW Peak |
| Higher power available |
| SO239, Type-N, or DIN Connectors available |
| 5X5X2 inches, approx 2 lbs |
Click here
for price list and ordering information.
50 Ohm Line Isolator
These current devices are based on the W1JR Baluns above. They are used to
stop RFI on the outside of a coaxial cable shield from entering a radio shack.
They also are use to isolate vertical feed points to eliminate coaxial cable
RF pickup.
Key Benifits:
| Feedline is decoupled from vertical radial system |
| Rejects feedline radiation into sensitive areas of the radio room |
| Perfect for raised radial systems to prevent feedline from coupling to
the radials |
Features:
| 50Ω unbalanced to 50 Ω unbalanced Current Isolator |
| Rated for 5KW CW / 10 KW PEP, these Isolators offer the same quality as our
well known W1JR baluns. |
| VSWR 1:1, 50 ohm devices |
| Teflon SO239 on either side of the box, also available in Type-N and
7/16DIN |
| 4X4X2 inches NEMA 4X Sealed boxes |
Click here
for price list and ordering information.
Balun mounting plate BMP-4
The solution to mounting our AS series baluns to the boom of
your antenna
Accepts all 4 inch square baluns with mounting tabs.
Includes Plate, 4 stainless steel #8 bolts and hardware - does
not include U bolt
pre-drilled for 2 inch and 3 inch Mast U-bolts. Room enough
for you to drill holes for a different size boom and U-bolts.
Pricing and Ordering
Click here
for price list and ordering information.
CAL AV Family of Baluns
EB-3, EB-1, EB-2
External Bead Baluns - "EB" Series
General Description "EB" Series
The EB series are external bead baluns. They are constructed of a length of Teflon
coaxial cable surrounded by ferrite beads. At one end of the cable is a coaxial
connector that mates with a
cable plug on the feed line. At the other end are wire leads to facilitate connection to
a dipole or driven element. The wire leads are color-coded for ease of phasing multiple
elements or
antennas; white = coax center. CAL-AV Labs' baluns are vacuum impregnated and sealed
against weather. The exterior surface is paintable. Baluns in the picture are, left to
right,
EB-3, EB-1, and EB-2. Click on the image for an enlargement.
Purpose
A balun's purpose is to allow connecting a BALanced load (e.g., a dipole or driven
element) to
an UNbalanced line, thus the name. In transmitting antennas, this is accomplished by
presenting a high impedance to RF currents flowing outside the coax shield. This forces
currents in each side of a driven element to be equal. This is especially important in
beam antennas because it prevents distortion of the beam's pattern caused by unequal
currents in the driver(s). In a simple dipole, the balun assures that the dipole, and
not the feed line, is doing the radiating.
EB-1 External Beaded Balun
Continuous Coverage From 1.8 TO 30 MHz
EB-1
General Description
The EB-1 is an external bead balun. It is constructed of a length of Teflon coaxial
cable surrounded by ferrite beads. At one end of the cable is a UHF coax connector that
mates with
the popular PL-259 cable-end connector; at the other end are wire leads to facilitate
connection to a dipole or driven element. The wire leads are color-coded for ease of
phasing
multiple elements or antennas; white = coax center. CAL-AV Labs' baluns are vacuum
impregnated and sealed against weather. The exterior surface is paintable.
EB-1 Specifications
Length: 14 inches.
Freq. range: 1.8 through 30 MHz.
Rated Power: 2.5KW CW; 3KW PEP.
Features
Vacuum impregnated, fully sealed weatherproof case UHF
Connector Mates with UHF Cable Plug, (e.g. PL-259)
Color-Coded AWG-14 Wires for ease of Connection 100% Tested for Hipot, Mechanical, and
Color Coding
Specifications
Useful Frequency Range: 1.8 Through 30MHz
Reactance to Unbalanced Currents: (Approximate)
| FREQUENCY MHz |
Z, OHMS |
| 2 |
600 |
| 10 |
1250 |
| 20 |
1400 |
| 30 |
1450 |
Electrical Properties
Impedance: 50 Ohms, Nominal
Connectors: UHF Jack To AWG 14 Wire Leads. 6 inches
Voltage, Absolute Max, Sea Level: 500 V Peak
Power Level, Max Continuous, Sea Level:
| FREQUENCY, MHz |
POWER, kW |
| 1.8 - 14 |
2.5 |
| 18 - 30 |
2 |
Physical Properties
Length: 14 Inches Overall (Body) with 6-inch Leads
Diameter: Body, 0.85 Inch; Top Cap, 1.10 inches
Color: Body, Grey; Leads, Black (Shield) and White (Center Conductor).
Weight: Approx. 0.5 pounds
Temperature Range: Storage and Operating, -58 To +158 F (-50 To +70 C)
Testing
100% of Units
Hipot @ 500 VDC
Continuity, Each Lead @ 3 Amps RMS, 60 Hz
Verification of Color Coding
Mechanical Mating, UHF Connector
EB-2 Low Profile, High-Band Balun
Continuous Coverage From 10 TO 60 MHz
EB-2
General Description
The EB-2 is an external bead balun. It is constructed of a length of Teflon coaxial
cable surrounded by ferrite beads. At one end of the cable is a UHF coax connector that
mates with
the popular PL-259 cable-end connector; at the other end are wire leads to facilitate
connection to a dipole or driven element. The wire leads are color-coded for ease of
phasing
multiple elements or antennas; white = coax center. CAL-AV Labs' baluns are vacuum
impregnated and sealed against weather. The exterior surface is paintable.
Features
Continuous coverage from 30 through 6 Meter Bands;
Vacuum impregnated, fully sealed weatherproof case UHF Connector Mates with UHF Cable
Plug, (e.g. PL-259)
Color-Coded AWG-14 Wires for ease of Connection 100% Tested for Hipot, Mechanical, and
Color Coding
Specifications
Useful Frequency Range: 9 Through 60MHz
Reactance to Unbalanced Currents: (Approximate)
| FREQUENCY MHz |
Z, OHMS |
| 10 |
502 |
| 20 |
536 |
| 30 |
587 |
| 60 |
689 |
Electrical Properties
Impedance: 50 Ohms, Nominal
Connectors: UHF Jack To AWG 14 Wire Leads. 6 inches
Voltage, Absolute Max, Sea Level: 500 V Peak
Power Level, Max Continuous, Sea Level:
| FREQUENCY, MHz |
POWER, kW |
| 10 - 30 |
2 |
| 30 - 60 |
2 |
Physical Properties
Length: 8.3 Inches Overall (Body) with 6-inch Leads
Diameter: Body, 0.85 Inch; Top Cap, 1.10 inches
Color: Body, Grey; Leads, Black (Shield) and White (Center Conductor).
Weight: Approx. 0.3 pounds
Temperature Range: Storage and Operating, -58 To +158 F (-50 To +70 C)
Testing
100% of Units
Hipot @ 500 VDC
Continuity, Each Lead @ 3 Amps RMS, 60 Hz
Verification of Color Coding
Mechanical Mating, UHF Connector
EB-3 Low Profile, High-Power Balun
Continuous Coverage From 7 TO 30 MHz
EB-3
General Description
The EB-3 is an external bead balun. It is constructed of a piece of coaxial cable
surrounded by ferrite beads. At one end is a connector that mates with the DIN 7/16
cable plug on the feed
line. At the other end are Teflon-insulated AWG 10 wire leads to facilitate connection
to a dipole or driven element. The wire leads are color-coded for ease of phasing
multiple elements or antennas. White = coax center. The exterior surface is paintable.
Features
Continuous coverage from 40 through 10 Meter Bands;
Vacuum impregnated, fully sealed weatherproof case
Connector mates with 7/16 DIN cable plugs
Color-Coded AWG-14 Wires for ease of Connection 100% Tested for Hipot, Mechanical, and
Color Coding
Specifications
Useful Frequency Range: 7 through 60 MHz
Reactance to Unbalanced Currents: (Approximate)
| FREQUENCY MHz |
Z, OHMS |
| 7 |
930 |
| 10 |
1116 |
| 14 |
1488 |
| 30 |
1711 |
| 60 |
2083 |
Electrical Properties
Impedance: 50 Ohms, Nominal
Connectors: DIN 7 / 16 jack to Teflon covered AWG 10 wires, 6" long
Voltage, Absolute Max, Sea Level: 500 V Peak
Power Level, Max Continuous, Sea Level:
| FREQUENCY, MHz |
POWER, kW |
| 7 - 23 |
10 |
| 24 - 30 |
8.5 |
| 50 - 60 |
5 |
Physical Properties
Length: 17 Inches Overall (Body) with 6-inch Leads
Diameter: Body, 1.7 Inch; Top and bottom cap, 2 inches
Color: Body, Grey; Leads, Black (Shield) and White (Center Conductor).
Weight: Approx. 3.25 pounds
Temperature Range: Storage and Operating, -58 To +158 F (-50 To +70 C)
Testing
100% of Units
Hipot @ 500 VDC
Continuity, Each Lead @ 3 Amps RMS, 60 Hz
Verification of Color Coding
Mechanical mating, DIN 7 / 16 connector
Pricing and Ordering
Click here
for price list and ordering information.
50 to 75 ohm High Power Wideband Transformers
These UN-UN transformers are housed in die-cast aluminum water
resistant boxes and include a standard silver and Teflon SO239 connector or an optional
N-type connector.
They will handle 5 kW+ from 1.8 to over 60 Mhz. Insertion
loss is negligible, and SWR is 1-1.1 to 1 over the entire bandwidth. These
transformers are perfect for use with CATV 75 ohm hard-line.
Connectors available are SO239 standard, Type N, 7/16 DIN.
Pricing and Ordering
Click here
for price list and ordering information.
Custom Baluns and
Transformers
Large high power 200 OHM to 50 OHM Balun for a Log Periodic over the
horizon radar antenna
300 Ohm short-wave broadcast air cooled Balun now in Equatorial
Africa at a 20 kW AM radio station
300 ohm output side
Please call us with your requirements for custom Baluns and RF Transformers
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