Chameleon CHA F-LOOP 3.0 Plus (80 – 10 M) INC Aluminium Radiator


The CHA F-LOOP 3.0 has been crafted with great attention to portability, usability, strength and performance. In contrast to analogous antennas available elsewhere, this product is crafted from superior components that are skillfully created and constructed in the USA.


Chameleon Antenna is thrilled to present their latest product, an easy to install HF magnetic loop antenna. These antennas have been used for decades in military, diplomatic, and shipboard HF communication links due to their robustness and dependability when it comes to reliable radio communication.

Only recently on the market for amateur radio, these antennas possess a real practical benefit compared to a short vertical whip tuned against earth or a full-sized vertical antenna – their independence from a ground plane and earth in order to be efficiently operational. This exclusive quality has particular importance for antennas in restricted areas or those which require portability.

In comparison, vertically oriented loops don’t need to be more than a loop diameter above ground, making them easy to install in limited spaces. Placing a small loop high has no effect on sky wave propagation performance; the most important aspect is that it’s clear of objects and pointed towards the correct direction of radiation.

The CHA F-LOOP 3.0 underwent field trials to compare it with an outdoor full size quarter wave vertical antenna. Amazingly, it was only around one to two S-units lower for both transmitting and receiving within a 3.5 MHz to 29.7 MHz range, covering the 80 – 10-meter ham bands – all of that in a meager three foot diameter!

The magnetic loop is distinctive from other antennas as it places emphasis on the magnetic component (H field) rather than the electric part (E field) of the radio wave. Further, its high Q resonance at around 17KHz for 40 meters grants protection from disturbances beyond its bandwidth.

The CHA F-LOOP 3.0 Antenna has been crafted with weight, portability, versatility and cost in mind and it is perfect for RV/camping, hotels, apartments, condominiums, homeowner’s associations, deed restrictions or CCRs (Covenants, Conditions & Restrictions) situations. Impressively constructed and advanced compared to other portable magnetic loop antennas on the market today, this product really stands out when it comes to Shortwave Listening (SWL) or any environment where a multi-band wire or vertical antenna is impractical.

The crimp PL-259 connectors that we’re using with all our RG-58 are UHF-7604L connectors from PAN-PACIFIC. They’re the best and the leader in the industry.

  • There is no need for soldering; therefore, installation time is reduced.
  • It takes an experienced technician about 15 seconds to install a crimp-crimp connector, thereby greatly reducing the time required to create cable assemblies. This is very important in today’s cabling market where time is of the essence and fewer technicians are being asked to maintain more and more equipment. Digital video, computer and network cabling is almost universally crimped today.
  • Crimped connections, done correctly, can be superior to soldered connections.
  • A good crimped connection deforms the metal sufficiently past the yield point, but not too much, so that the “spring back” keeps the connection secure, even under thermal cycling (the coefficient of expansion of the two metals might be different) and vibration.
  • A good crimp connection is gas tight and won’t wick: it is sometimes referred to as a “cold weld”.
  • Like the solder method, it can be used on solid or stranded conductors, and provides a good mechanical and electrical connection.

Technical Specifications:

  • 3.5 MHz to 29.7 MHz (80 – 10-meter ham bands)
  • Power handling: 10 W CW or 25 W SSB
  • Proprietary solderless aluminium coupling loop. This coupling loop design can be used with any types of coax cable feed-lines. Because of its rigidity, the antenna tuning will remain stable, consistent and will prevent SWR fluctuations due to usual coupling loop deformation.
  • The three sections collapsible portable mast allows easy storage, fast deployment, and ease of use in all conditions. No need to play with multiple tubular PVC sections to assemble the antenna.
  • The bottom of the telescopic mast is equipped with a stainless steel 3/8-24 threaded hole for easy tripod installation on the tuning box 3/8-24 screw.
  • The 12’ RG-58 with integrated RFI choke feed-line decouples the coupling loop from the radio which is essential to prevent SWR fluctuation while rotating the antenna or moving the coax cable around.
  • Our custom-made capacitors which are equipped with a 6:1 reducer, offer a smooth and consistent tuning while providing the highest efficient performance on the market.
  • Shoulder Bag
  • Larger Delrin tuning knob for smoother tuning and operation.
  • The base of the tuning unit is equipped with an aluminium anodized base plate. That base plate can be placed directly on a flat surface or can be mounted on a tripod (14-20 thread or 3/8 through hole for CHA JAWMOUNT installation).

The CHA F-LOOP 3.0 PLUS antenna system consists of:

  • 1 X CHA F-LOOP 3.0 tuning box
  • 1 X TWO Sections Aluminum Radiator (10M – 40M)
  • 1 X Proprietary coupling loop 7″
  • 2 X LMR-400 coax cable radiators (10M – 80M)
  • 1 X Dual Female connector
  • 1 X 12’ RG-58 Coax with integrated RFI choke feed-line
  • 1 X Shoulder Bag
  • 1 X Proprietary coupling loop 6.5″
  • 1 X Telescopic Mast
  • 1 X User guide

Additional information

Weight 3 kg