Reviews For: CHA M-LOOP
Category: Antennas: HF: Verticals; Wire; Loop
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Registered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted.| Review Summary For : CHA M-LOOP | |||
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| Description: 3.5-54 MHz The CHA M-LOOP is a 36" wide capacitively coupled magnetic loop antenna made of a single piece of 1" diameter aluminum tubing. This antenna is small, operates well when mounted at ground level, and exhibits performance that competes with almost any HF antenna except a multi-element beam at a wavelength or more above ground. The coupling of the antenna is achieved with multiple variable capacitors and use a capacitive voltage divider technique developed for the Patterson Loop (Army-Loop) in 1960’s. In other word, no Faraday coupling loop is needed to play with in order to bring the M-LOOP to great resonance. Because of its unique coupling technique the M-LOOP will tune easily even at very close proximity of metallic or electrically conductive surfaces. Successful antenna tuning attempts (providing very efficient radiation and transmissions results) have been realized with the M-LOOP placed directly on an industrial metal working bench or on an open pick-up vehicle back door. The same great results have been obtained while operated on a widely popular urethane coated metal pick-nick park table. Also due to the same great coupling technique the M-LOOP can be used with various length of wire to cover 160M. Compared with other magnetic loop antennas on the market that are made of coax cables and that have tendency to sag, the M-LOOP is made of a 1” diameter circular aluminum tubing. The loop is firmly attached to the suitcase by custom aluminum connectors that allow the loop to rotate freely at 360º around it. The M-LOOP is free-standing and doesn’t require any support to be operated. It is now easier than ever to rotate the antenna to seek strong signals without the fear of having to retune it. One of main problem with magnetic loop antennas is that they are not very easy to transport in the field. They’re usually made of a flimsy and rather poorly designed plastic cover that protects the tuning capacitor. Chameleon Antenna has solved that problem! The matching box has been designed to fit into an ultra high-strength polypropylene copolymer resin that is UV, solvent, corrosion and fungus resistant. The top lid is equipped with a complete gasket seal making the case absolutely water resistant. The M-LOOP can be installed on a regular tripod (1/4” or 3/8” threads) with the help of an aluminum plate that has been attached under the case. The aluminum plate also provides a counter-weight that balances nicely the antenna when used on a flat surface. Because multiple variable capacitors are either used in series or parallels, the minimum capacitor voltage rating has been increased beyond QRP limits. The antenna is ideal for restricted operating areas and for portable operation. The M-LOOP can work close to the performance of a full size dipole antenna (sometimes exceeding a dipole) and do not require radials. The antenna can be mounted low to the ground, and will exhibit a high level of performance. Specifications: Frequency: 6M – 80M Power: 35W CW or 70W SSB (Might vary with the air humidity percentage) RF Connection: SO-239 Length: 36" Diameter Weight: 8.5 lb. The antenna system consists of: 1 X CHA M-LOOP Matching Box 1 X 36" LOOP 1 x 12' RG58A + Integrated RFI Choke | |||
| Product is in production | |||
| More Info: http://chameleonantenna.com/ | |||
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CHA M-LOOP
3.5-54 MHz
The CHA M-LOOP is a 36" wide capacitively coupled magnetic
loop antenna made of a single piece of 1" diameter aluminum
tubing. This antenna is small, operates well when mounted at
ground level, and exhibits performance that competes with
almost any HF antenna except a multi-element beam at a
wavelength or more above ground.
The coupling of the antenna is achieved with multiple variable
capacitors and use a capacitive voltage divider technique
developed for the Patterson Loop (Army-Loop) in 1960’s. In
other word, no Faraday coupling loop is needed to play with in
order to bring the M-LOOP to great resonance.
Because of its unique coupling technique the M-LOOP will
tune easily even at very close proximity of metallic or
electrically conductive surfaces. Successful antenna tuning
attempts (providing very efficient radiation and transmissions
results) have been realized with the M-LOOP placed directly on
an industrial metal working bench or on an open pick-up
vehicle back door. The same great results have been obtained
while operated on a widely popular urethane coated metal
pick-nick park table.
Also due to the same great coupling technique the M-LOOP
can be used with various length of wire to cover 160M.
Compared with other magnetic loop antennas on the market
that are made of coax cables and that have tendency to sag,
the M-LOOP is made of a 1” diameter circular aluminum
tubing. The loop is firmly attached to the suitcase by custom
aluminum connectors that allow the loop to rotate freely at
360º around it.
The M-LOOP is free-standing and doesn’t require any support
to be operated. It is now easier than ever to rotate the antenna
to seek strong signals without the fear of having to retune it.
One of main problem with magnetic loop antennas is that they
are not very easy to transport in the field. They’re usually made
of a flimsy and rather poorly designed plastic cover that
protects the tuning capacitor. Chameleon Antenna has solved
that problem! The matching box has been designed to fit into
an ultra high-strength polypropylene copolymer resin that is
UV, solvent, corrosion and fungus resistant. The top lid is
equipped with a complete gasket seal making the case
absolutely water resistant.
The M-LOOP can be installed on a regular tripod (1/4” or 3/8”
threads) with the help of an aluminum plate that has been
attached under the case. The aluminum plate also provides a
counter-weight that balances nicely the antenna when used on
a flat surface.
Because multiple variable capacitors are either used in series
or parallels, the minimum capacitor voltage rating has been
increased beyond QRP limits.
The antenna is ideal for restricted operating areas and for
portable operation. The M-LOOP can work close to the
performance of a full size dipole antenna (sometimes
exceeding a dipole) and do not require radials. The antenna
can be mounted low to the ground, and will exhibit a high level
of performance.
Specifications:
Frequency: 6M – 80M
Power: 35W CW or 70W SSB (Might vary with the air humidity
percentage)
RF Connection: SO-239
Length: 36" Diameter
Weight: 8.5 lb.
The antenna system consists of:
1 X CHA M-LOOP Matching Box
1 X 36" LOOP
1 x 12' RG58A + Integrated RFI Choke
The CHA M-LOOP is a 36" wide capacitively coupled magnetic
loop antenna made of a single piece of 1" diameter aluminum
tubing. This antenna is small, operates well when mounted at
ground level, and exhibits performance that competes with
almost any HF antenna except a multi-element beam at a
wavelength or more above ground.
The coupling of the antenna is achieved with multiple variable
capacitors and use a capacitive voltage divider technique
developed for the Patterson Loop (Army-Loop) in 1960’s. In
other word, no Faraday coupling loop is needed to play with in
order to bring the M-LOOP to great resonance.
Because of its unique coupling technique the M-LOOP will
tune easily even at very close proximity of metallic or
electrically conductive surfaces. Successful antenna tuning
attempts (providing very efficient radiation and transmissions
results) have been realized with the M-LOOP placed directly on
an industrial metal working bench or on an open pick-up
vehicle back door. The same great results have been obtained
while operated on a widely popular urethane coated metal
pick-nick park table.
Also due to the same great coupling technique the M-LOOP
can be used with various length of wire to cover 160M.
Compared with other magnetic loop antennas on the market
that are made of coax cables and that have tendency to sag,
the M-LOOP is made of a 1” diameter circular aluminum
tubing. The loop is firmly attached to the suitcase by custom
aluminum connectors that allow the loop to rotate freely at
360º around it.
The M-LOOP is free-standing and doesn’t require any support
to be operated. It is now easier than ever to rotate the antenna
to seek strong signals without the fear of having to retune it.
One of main problem with magnetic loop antennas is that they
are not very easy to transport in the field. They’re usually made
of a flimsy and rather poorly designed plastic cover that
protects the tuning capacitor. Chameleon Antenna has solved
that problem! The matching box has been designed to fit into
an ultra high-strength polypropylene copolymer resin that is
UV, solvent, corrosion and fungus resistant. The top lid is
equipped with a complete gasket seal making the case
absolutely water resistant.
The M-LOOP can be installed on a regular tripod (1/4” or 3/8”
threads) with the help of an aluminum plate that has been
attached under the case. The aluminum plate also provides a
counter-weight that balances nicely the antenna when used on
a flat surface.
Because multiple variable capacitors are either used in series
or parallels, the minimum capacitor voltage rating has been
increased beyond QRP limits.
The antenna is ideal for restricted operating areas and for
portable operation. The M-LOOP can work close to the
performance of a full size dipole antenna (sometimes
exceeding a dipole) and do not require radials. The antenna
can be mounted low to the ground, and will exhibit a high level
of performance.
Specifications:
Frequency: 6M – 80M
Power: 35W CW or 70W SSB (Might vary with the air humidity
percentage)
RF Connection: SO-239
Length: 36" Diameter
Weight: 8.5 lb.
The antenna system consists of:
1 X CHA M-LOOP Matching Box
1 X 36" LOOP
1 x 12' RG58A + Integrated RFI Choke
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