40M-4 WORLD CLASS EXTRA - 4 ELEMENT MONOBAND BEAM ANTENNA FOR 40 METERS

CARATTERISTICHE ELETTRICHE

• GAMMA OPERATIVA: 7.0-7.3 MHz
• LARGHEZZA DI BANDA: 260 kHz
• GUADAGNO: 7.2 dBd
• FRONTE/RETRO: 20 dB
• R.O.S. MAX.: 1.5: l
• IMPEDENZA: 50 OHM
• BALUN: 4: l da 5kW

CARATTERISTICHE MECCANICHE

• LUNGHEZZA ELEMENTO 14 MT.
• LUNGHEZZA BOOM: 12.8 MT.
• RAGGIO DI ROTAZIONE: 9.75 MT.
• AREA ESPOSTA: 1.11 mq. (12 sq.ft .)
• PESO: 44.5 KG.
• DIAMETRO BOOM: 3 POLLICI (7.6 cm.)
• ATTACCO A PALO: 2 POLLICI (3 OPZ.)​

WORLD CLASS EXTRA HF ANTENNAS ...
KLM's World Class Extra series of antennas are designed to satisfy the needs of the most serious DX operator. The
80M-3, 40M-4 and the 20M-15M-10M 6 element monobanders offer the ultimate in performance with no compromises.
The electrical designs are devised to achieve maximum gain, bandwidth, and front-to-back ratios. Construction materials
and techniques are selected for maximum strength and durability. All of KLM's World Class Extra antennas use
multiple driven elements. The average multi-element Yagi type beam antenna with only a single driven element is
essentially a high Q system. Maximum gain, maximum F/B ratios, minimum VSWR and cleanest patterns are possible
only over a very narrow frequency range; for example over the phone or CW portions of an amateur band. The Q of a
single driven element becomes extremely high in the presence of multiple parasitic elements when these elements are
adjusted tor optimum performance. The Q can be reduced and the bandwidth increased by manipulating the dimensions
of the parasitic elements, but at the expense of reduced gain and F/B ratios. This undesirable situation can be remedied
by the use of two driven elements fed in parallel and tuned to different frequencies - one frequency near the bottom and
one near the top of the amateur band. The parasitic elements can now be adjusted tor maximum gain and F/B ratios
rather than tor broad VSWR curves. This is the familiar "log-cell" driven element system derived from log-periodic
antenna design that is used in most of KLM's HF antenna designs. The response of KLM dual-driven element antennas
rolls off very rapidly outside the specified band coverage thus providing an added bonus in the form of lessened radiation
on adjacent frequencies. KLM uses boom-insulated elements throughout. This provides total isolation of the antenna
elements from the boom and minimizes possible interaction effects from the boom. Exclusive KLM designed insulators
are molded of a special glass-filled materiai which has excellent insulating properties and extremely high mechanical
strength. The form is webbed .... heavily reintorced at stress points to withstand high winds safely. To minimize unsightly
"droop" in long elements, the mounting angle is tilted slightly upward.

HF MONOBAND YAGIS ...
KLM high performance monobanders are the answer for quality installations where larger models are not practical or
necessary. Moderate in size, they can be easily stacked with other beams without overloading the tower/rotor capabilities.
KLM monobanders offer many of the superb performance and construction features of the World Class Extra
series. KLM's dual-driven element system provides full performance and broadband coverage, in many cases across
the entire amateur band! Matching problems are eliminated with the KLM 3-60-4:1 baluns which are rated to 5kW PEP.
6063-T832 aluminum alloy, massive insulators and stainless steel hardware (except U-bolts), along with swaged boom
sections assure years of trouble-free, consistent performance. The 40M-3, 40M-4, 20M-5, 20M-6, and the 15M-6 are
also available with a heavy duty boom (1/4" wall) at an additional cost. The 80M-2 and 80M-3 come with the heavy duty

KLM - 20M-5 - 5 ELEMENT MONOBAND BEAM ANTENNA FOR 20 METERS - 5 kW p.e.p. Balun included in the box

WORLD CLASS EXTRA HF ANTENNAS ...
KLM's World Class Extra series of antennas are designed to satisfy the needs of the most serious DX operator. The
80M-3, 40M-4 and the 20M-15M-10M 6 element monobanders offer the ultimate in performance with no compromises.
The electrical designs are devised to achieve maximum gain, bandwidth, and front-to-back ratios. Construction materials
and techniques are selected for maximum strength and durability. All of KLM's World Class Extra antennas use
multiple driven elements. The average multi-element Yagi type beam antenna with only a single driven element is
essentially a high Q system. Maximum gain, maximum F/B ratios, minimum VSWR and cleanest patterns are possible
only over a very narrow frequency range; for example over the phone or CW portions of an amateur band. The Q of a
single driven element becomes extremely high in the presence of multiple parasitic elements when these elements are
adjusted tor optimum performance. The Q can be reduced and the bandwidth increased by manipulating the dimensions
of the parasitic elements, but at the expense of reduced gain and F/B ratios. This undesirable situation can be remedied
by the use of two driven elements fed in parallel and tuned to different frequencies - one frequency near the bottom and
one near the top of the amateur band. The parasitic elements can now be adjusted tor maximum gain and F/B ratios
rather than tor broad VSWR curves. This is the familiar "log-cell" driven element system derived from log-periodic
antenna design that is used in most of KLM's HF antenna designs. The response of KLM dual-driven element antennas
rolls off very rapidly outside the specified band coverage thus providing an added bonus in the form of lessened radiation
on adjacent frequencies. KLM uses boom-insulated elements throughout. This provides total isolation of the antenna
elements from the boom and minimizes possible interaction effects from the boom. Exclusive KLM designed insulators
are molded of a special glass-filled materiai which has excellent insulating properties and extremely high mechanical
strength. The form is webbed .... heavily reintorced at stress points to withstand high winds safely. To minimize unsightly
"droop" in long elements, the mounting angle is tilted slightly upward.

HF MONOBAND YAGIS ...
KLM high performance monobanders are the answer for quality installations where larger models are not practical or
necessary. Moderate in size, they can be easily stacked with other beams without overloading the tower/rotor capabilities.
KLM monobanders offer many of the superb performance and construction features of the World Class Extra
series. KLM's dual-driven element system provides full performance and broadband coverage, in many cases across
the entire amateur band! Matching problems are eliminated with the KLM 3-60-4:1 baluns which are rated to 5kW PEP.
6063-T832 aluminum alloy, massive insulators and stainless steel hardware (except U-bolts), along with swaged boom
sections assure years of trouble-free, consistent performance. The 40M-3, 40M-4, 20M-5, 20M-6, and the 15M-6 are
also available with a heavy duty boom (1/4" wall) at an additional cost. The 80M-2 and 80M-3 come with the heavy duty
boom.

CARATTERISTICHE ELETTRICHE:

• GAMMA OPERATIVA: 13.9-14.4 MHz
• LARGHEZZA DI BANDA: 500 kHz
• GUADAGNO: 9.7 dBd
• FRONTE/RETRO: 30 dB
• R.O.S. MAX.: 1.5:1
• IMPEDENZA: 50 OHM
• BALUN: 4:1 da 5kW p.e.p. 

CARATTERISTICHE MECCANICHE:

• LUNGHEZZA ELEMENTO: 11.28 m.
• LUNGHEZZA BOOM: 12.8 m.
• RAGGIO DI ROTAZIONE· 8.53 m.
• AREA ESPOSTA: 0.86 mq. (9 .3 sq.ft.)
• PESO : 29.5  kg.
• DIAMETRO BOOM: 3 POLLICI (7 .6 cm.)
• ATTACCO A PALO: 2 POLLICI (3" opzionale)

KLM - 20M-6 - 6 ELEMENT MONOBAND BEAM ANTENNA FOR 20 METERS - 5 kW p.e.p. Balun included in the box

The competition on 20 meters is fierce.

A KLM World Class Extra monoband beam lets you compete at the top of the pileups.

WORLD CLASS EXTRA HF ANTENNAS ...
KLM's World Class Extra series of antennas are designed to satisfy the needs of the most serious DX operator. The
80M-3, 40M-4 and the 20M-15M-10M 6 element monobanders offer the ultimate in performance with no compromises.
The electrical designs are devised to achieve maximum gain, bandwidth, and front-to-back ratios. Construction materials
and techniques are selected for maximum strength and durability. All of KLM's World Class Extra antennas use
multiple driven elements. The average multi-element Yagi type beam antenna with only a single driven element is
essentially a high Q system. Maximum gain, maximum F/B ratios, minimum VSWR and cleanest patterns are possible
only over a very narrow frequency range; for example over the phone or CW portions of an amateur band. The Q of a
single driven element becomes extremely high in the presence of multiple parasitic elements when these elements are
adjusted tor optimum performance. The Q can be reduced and the bandwidth increased by manipulating the dimensions
of the parasitic elements, but at the expense of reduced gain and F/B ratios. This undesirable situation can be remedied
by the use of two driven elements fed in parallel and tuned to different frequencies - one frequency near the bottom and
one near the top of the amateur band. The parasitic elements can now be adjusted tor maximum gain and F/B ratios
rather than tor broad VSWR curves. This is the familiar "log-cell" driven element system derived from log-periodic
antenna design that is used in most of KLM's HF antenna designs. The response of KLM dual-driven element antennas
rolls off very rapidly outside the specified band coverage thus providing an added bonus in the form of lessened radiation
on adjacent frequencies. KLM uses boom-insulated elements throughout. This provides total isolation of the antenna
elements from the boom and minimizes possible interaction effects from the boom. Exclusive KLM designed insulators
are molded of a special glass-filled materiai which has excellent insulating properties and extremely high mechanical
strength. The form is webbed .... heavily reintorced at stress points to withstand high winds safely. To minimize unsightly
"droop" in long elements, the mounting angle is tilted slightly upward.

HF MONOBAND YAGIS ...
KLM high performance monobanders are the answer for quality installations where larger models are not practical or
necessary. Moderate in size, they can be easily stacked with other beams without overloading the tower/rotor capabilities.
KLM monobanders offer many of the superb performance and construction features of the World Class Extra
series. KLM's dual-driven element system provides full performance and broadband coverage, in many cases across
the entire amateur band! Matching problems are eliminated with the KLM 3-60-4:1 baluns which are rated to 5kW PEP.
6063-T832 aluminum alloy, massive insulators and stainless steel hardware (except U-bolts), along with swaged boom
sections assure years of trouble-free, consistent performance. The 40M-3, 40M-4, 20M-5, 20M-6, and the 15M-6 are
also available with a heavy duty boom (1/4" wall) at an additional cost. The 80M-2 and 80M-3 come with the heavy duty

KLM - 20-30-6LPA - LOG-PERIODICA 6 ELEMENT ANTENNA OPERATING CONTINUOUSLY FROM 20 TO 30  MHz WITH LOW V.S.W.R.

Complete with 5 kW p.e.p. Balun

Longest element: 24 feet

Boom Lenght: Almost 20 feet

HY-GAIN - TH7DX - 7 ELEMENT YAGI TYPE TRIBAND BEAM FOR 10-15-20 METERS (28-21-14 MHz) - Complete with BN-86 Balun

This amazing tri-bander, using a dual driven 7 - element system maintains a VSWR of less than 2:1 across all bands, including ALL of 10 Meters.

No compromise on gain performance was needed to achieve this efficiency.

A unique combination of trapped and monoband parasitic elements produces a front-to-back ratio of 27 dB.

The antenna includes exclusive diecast aluminum, rugged boom-to-mast clamp, and heavy gauge element-to-boom brackets.

Comes complete with BN-86 balun.

HY-GAIN - EXPLORER-14 - 10-15-20 METERS (28-21-14 MHz) WIDE BAND BEAM, COMPLETE WITH 1500W p.e.p. Balun BN-86

Hy-Gain Explorer-14 Tri-Band Antennas are very unique 4-element, three-band beam antennas designed for broadband, high performance and high efficiency operation on the Radio Amateur 10, 15, and 20 meter bands. Their boom length of 14 ft. 1.5 in. and longest element of 31 ft. 6 in. combine for a modest 17 ft. 3 in. turning radius. That’s small enough for most city lots!

Broadband operation is accomplished through the use of a mono-band reflector on 10 meters, a duo-band reflector on 15 and 20 meters and a very unique driven-element system called a Para-Sleeve. The Para-Sleeve System consists of a trapped driven element for 15 and 20 meters, electrically connected to the balun and Beta-Match; and a set of two parallel sleeve elements for 10 meters.

Unlike many other tri-band HF antennas with limited bandwidth, these antennas exhibit 2:1 SWR, or less, across 14.0-14.35 MHz, 21.0-21.45 MHz, and 28.0-29.7 MHz! Now THAT’s bandwidth! 

DX Hunters! Here is a broadband, legal-limit solution for a directional gain-antenna on three of the best DX bands! 

HY-GAIN - TH5MK2 - 5 ELEMENT WIDE BAND BEAM FOR 10-15-20 METERS (28-21-14 MHz) - Complete with BN-86 1500 W p.e.p. balun

Hy-Gain TH-5MK2 Tri-Band Beam Antennas are 5-element, 3-band beam antennas designed for broadband, high performance operation on the 20, 15, and 10 meter bands. Broad band performance is accomplished through the use of two fully trapped driven elements. Stainless steel hardware and tubing clamps are used on all electrical connections. The antennas are designed to fit masts from 1.90 in. to 2.50 in. diameters and can be rotated with Hy-Gain CD-45II, Ham-IV, or T2X Tailtwister rotators.

Hy-Gain 50 ohm BN-86 baluns and preformed feed straps are supplied with Hy-Gain TH-5MK2 Tri-Band Beam Antennas.

HY-GAIN - 155CA - 5 ELEMENT "LONG JOHN" YAGI BEAM FOR 15 or 12 METRI (21 or 24 MHz) - 26 FEET LONG BOOM

Hy-Gain Long John Yagi Antennas are computer-optimized HF beams. They feature full-sized elements, wide spaced, on a long boom. They also feature Hy-Gain's adjustable beta-match, rugged boom-to mast bracket, and stainless steel hardware and clamps for all electrical and mechanical connections.

These beams are ideal for contesting and DXing. Their excellent gain and front to back ratio means better resistance to QRM and better RST on the desired signal. Long Johns are ideal for stacking! Use two or three of them for unparalleled performance and durability.

Many hams prefer mono-band antennas for their no-compromise performance.
If you are in the mono-band camp, shop these Hy-Gain Long John Yagi Antennas from us.

In the manual you will find instructions to assemble and tune the antenna for either 12 or 15 meters. Your choice.

ANTENNA WEIGHT : 13,2 kg.

SHIPPING WEIGHT : 19 kg. (N. 2 BOXES)

KLM - 17M-3 - 3 ELEMENT MONOBAND YAGI BEAM ANTENNA - OPTIMIZED FOR 17 METERS (18 MHz) OPERATIONS

ELECTRICAL CHARACTERISTICS

• BAND SPAN: 18.065-18.170 MHZ
• BANDWIDTH: 105 kHz
• GAIN: 6.5 dBd
• FRONT TO BACK: 20 dB
• S.W.R. MAX.: 1.5:1
• IMPEDANCE: 50 OHM
• BALUN: 4:1, 5 kW p.e.p.

MECANICAL CHARACTERISTICS

• ELEMENT LENGHT: 8.53 m. (28')
• BOOM LENGHT: 5.1 m. (16' 9")
• TURN RADIUS: 5.18 m. (17')
• WINDLOAD AREA: 0.42 mq. (4.5 sq.ft .)
• WEIGHT : 11.3 KG. (25 LBS.)
• BOOM DIAMETER: 3' (7 .6 cm.)
• MAST ACCEPTED: UP TO 2' (3' OPTIONAL)

WORLD CLASS EXTRA HF ANTENNAS ...
KLM's World Class Extra series of antennas are designed to satisfy the needs of the most serious DX operator. The
80M-3, 40M-4 and the 20M-15M-10M 6 element monobanders offer the ultimate in performance with no compromises.
The electrical designs are devised to achieve maximum gain, bandwidth, and front-to-back ratios. Construction materials
and techniques are selected for maximum strength and durability. All of KLM's World Class Extra antennas use
multiple driven elements. The average multi-element Yagi type beam antenna with only a single driven element is
essentially a high Q system. Maximum gain, maximum F/B ratios, minimum VSWR and cleanest patterns are possible
only over a very narrow frequency range; for example over the phone or CW portions of an amateur band. The Q of a
single driven element becomes extremely high in the presence of multiple parasitic elements when these elements are
adjusted tor optimum performance. The Q can be reduced and the bandwidth increased by manipulating the dimensions
of the parasitic elements, but at the expense of reduced gain and F/B ratios. This undesirable situation can be remedied
by the use of two driven elements fed in parallel and tuned to different frequencies - one frequency near the bottom and
one near the top of the amateur band. The parasitic elements can now be adjusted tor maximum gain and F/B ratios
rather than tor broad VSWR curves. This is the familiar "log-cell" driven element system derived from log-periodic
antenna design that is used in most of KLM's HF antenna designs. The response of KLM dual-driven element antennas
rolls off very rapidly outside the specified band coverage thus providing an added bonus in the form of lessened radiation
on adjacent frequencies. KLM uses boom-insulated elements throughout. This provides total isolation of the antenna
elements from the boom and minimizes possible interaction effects from the boom. Exclusive KLM designed insulators
are molded of a special glass-filled materiai which has excellent insulating properties and extremely high mechanical
strength. The form is webbed .... heavily reintorced at stress points to withstand high winds safely. To minimize unsightly
"droop" in long elements, the mounting angle is tilted slightly upward.

HF MONOBAND YAGIS ...
KLM high performance monobanders are the answer for quality installations where larger models are not practical or
necessary. Moderate in size, they can be easily stacked with other beams without overloading the tower/rotor capabilities.
KLM monobanders offer many of the superb performance and construction features of the World Class Extra series.
KLM's dual-driven element system provides full performance and broadband coverage, in many cases across the entire amateur band!
Matching problems are eliminated with the KLM 3-60-4:1 baluns which are rated to 5kW PEP, or 1:1 baluns, rated at 4 kW p.e.p., depending on the model.
6063-T832 aluminum alloy, massive insulators and stainless steel hardware (except U-bolts), along with swaged boom
sections assure years of trouble-free, consistent performance. The 40M-3, 40M-4, 20M-5, 20M-6, and the 15M-6 are
also available with a heavy duty boom (1/4" wall) at an additional cost. The 80M-2 and 80M-3 come with the heavy duty
boom.

KLM - 15M-4 - YAGI TYPE BEAM ANTENNA - 4 ELEMENT MONOBAND - OPTIMIZED FOR 15 METERS (21 MHz)

KLM Exclusive double driven element for constant gain, f/b and maximum bandwidth.

ELECTRICAL

• OPERATIONAL BAND: 21.0-21.5 MHz
• BANDWIDTH: 500 kHz
• GAIN: 7.7 dBd
• FRONT TO BACK: 25 dB
• S.W.R. MAX.: l.5:1
• IMPEDANCE: 50 OHM
• BALUN: 4:1, 5kW p.e.p. , INCLUDED

MECHANICAL

• LONGEST ELEMENT 7.62 m. (25 ft.)
• BOOM LENGHT: 4.27 m. (14 ft.)
• TURN RADIUS: 4.27 m. (14 ft.)
• WINDLOAD AREA: 0.27 mq. (3 sq.ft.)
• WEIGHT: 8 kg. (18 lbs.)
• BOOM DIAMETER: 3" (7.6 cm.)
• MAST ACCEPTED: UP TO 2" (3 OPTIONAL)

WORLD CLASS EXTRA HF ANTENNAS ...
KLM's World Class Extra series of antennas are designed to satisfy the needs of the most serious DX operator. The
80M-3, 40M-4 and the 20M-15M-10M 6 element monobanders offer the ultimate in performance with no compromises.
The electrical designs are devised to achieve maximum gain, bandwidth, and front-to-back ratios. Construction materials
and techniques are selected for maximum strength and durability. All of KLM's World Class Extra antennas use
multiple driven elements. The average multi-element Yagi type beam antenna with only a single driven element is
essentially a high Q system. Maximum gain, maximum F/B ratios, minimum VSWR and cleanest patterns are possible
only over a very narrow frequency range; for example over the phone or CW portions of an amateur band. The Q of a
single driven element becomes extremely high in the presence of multiple parasitic elements when these elements are
adjusted tor optimum performance. The Q can be reduced and the bandwidth increased by manipulating the dimensions
of the parasitic elements, but at the expense of reduced gain and F/B ratios. This undesirable situation can be remedied
by the use of two driven elements fed in parallel and tuned to different frequencies - one frequency near the bottom and
one near the top of the amateur band. The parasitic elements can now be adjusted tor maximum gain and F/B ratios
rather than tor broad VSWR curves. This is the familiar "log-cell" driven element system derived from log-periodic
antenna design that is used in most of KLM's HF antenna designs. The response of KLM dual-driven element antennas
rolls off very rapidly outside the specified band coverage thus providing an added bonus in the form of lessened radiation
on adjacent frequencies. KLM uses boom-insulated elements throughout. This provides total isolation of the antenna
elements from the boom and minimizes possible interaction effects from the boom. Exclusive KLM designed insulators
are molded of a special glass-filled materiai which has excellent insulating properties and extremely high mechanical
strength. The form is webbed .... heavily reintorced at stress points to withstand high winds safely. To minimize unsightly
"droop" in long elements, the mounting angle is tilted slightly upward.

HF MONOBAND YAGIS ...
KLM high performance monobanders are the answer for quality installations where larger models are not practical or
necessary. Moderate in size, they can be easily stacked with other beams without overloading the tower/rotor capabilities.
KLM monobanders offer many of the superb performance and construction features of the World Class Extra
series. KLM's dual-driven element system provides full performance and broadband coverage, in many cases across
the entire amateur band! Matching problems are eliminated with the KLM 3-60-4:1 baluns which are rated to 5kW PEP.
6063-T832 aluminum alloy, massive insulators and stainless steel hardware (except U-bolts), along with swaged boom
sections assure years of trouble-free, consistent performance. The 40M-3, 40M-4, 20M-5, 20M-6, and the 15M-6 are
also available with a heavy duty boom (1/4" wall) at an additional cost. The 80M-2 and 80M-3 come with the heavy duty
boom.