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Chameleon Antenna CHA F-LOOP, Operator'S Manual, Page: 13 / 15

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Chameleon Antenna CHA F-LOOP Operator'S Manual Download Page 13

CHA F-LOOP 

Page 13 

 

7.

 

Ensure Band Switch (i) is set for your frequency range. 

8.

 

Turn Tuning Knob (h) fully counterclockwise. 

9.

 

Adjust Tuning Knob over entire range listening for a marked increase in received signal strength and receiver 
background noise. 

10.

 

If still not operational, replace Coaxial Cable assembly.  

Most problems with antenna systems are caused by 

the coaxial cables and connectors. 

11.

 

If still not operational, contact us for technical support. 

 

Specifications 

 

Frequency: 5.3 – 29.7 MHz (60 through 10 meter ham bands), 3.5 – 10.0 Mhz (80 through 40 meter ham 
bands) with optional 80 Meter Conversion Kit. 

 

Power: 25W intermittent duty cycle (SSB and SSB-based digital), 10W continuous duty cycle (CW, AM, FM, 
RTTY). 

 

Diameter: 2.44 feet 

 

RF Connection: UHF Plug (PL-259) 

 

SWR: Operator tunable, not greater than 1.5:1 at resonance and less than 2:1 for 15 KHz bandwidth 

 

Weight:  4 lbs 

 

Personnel Requirements and Setup Time: one operator, around 2 minutes 

 

Do not use an antenna tuner or coupler with this antenna  
 

Accessories 

The  following  accessories  are  available  for  purchase  from  Chameleon  Antenna

TM

.    Please  contact  us  at 

[email protected]

 for current prices and availability. 

 

 

High-Efficiency  Radiator  Loop.   

A  high-efficiency  1”  collapsible  aluminum  tubing  radiator  loop,  which 

increases efficiency an average of 142% over the standard flexible radiator loop, is available as an option.   

 

 

Coaxial Cable Assembly.

  50 feet of RG-58 with integrated RFI Choke.  Used to connect the CHA F-LOOP to 

the radio set.  This is a recommended accessory if you are not using a CHA RFI CHOKE. 

 

RF Choke Assembly.

 The CHA RFI CHOKE will prevent, greatly reduces or totally eliminates the RFI carried 

by the coax cable.  It can be installed either at the antenna feed point or right behind the Tuning Unit. This 
accessory is recommended if you are not using the Chameleon Antenna

TM

 Coaxial Cable Assembly.  

 

80 Meter Conversion Kit.

  The CHA F-LOOP 80 Meter Conversion Kit allows you to use the CHA F-LOOP on 

the 80 meter ham band by extending the lower frequency range of the Cha F-LOOP down to 3.5 MHz. 

Recommended non-supplied accessories: 

 

SWR Power Meter. 

 

Multi-Meter. 

 
 
 
 

Summary of Contents for CHA F-LOOP

Page 1: ...HF Faraday Loop Antenna CHA F LOOP Operator s Manual California USA WWW CHAMELEONANTENNA COM VERSATILE DEPENDABLE STEALTH BUILT TO LAST ...

Page 2: ...tect you Stay away from all power lines WARNING Never operate this antenna where people could be subjected to high levels of RF exposure especially above 10 watts or above 14 MHz Never use this antenna near RF sensitive medical devices such as pacemakers WARNING A tuned loop can exhibit several hundred Volts and concentrated electromagnetic radiation when operating at QRP power levels 5 10 W At hi...

Page 3: ...MHz to 29 7 MHz 60 10 meter ham bands The magnetic loop is different than typical antennas because it emphasizes the magnetic part of the radio wave H field rather than the electric part E field of the radio wave It also has a high Q resonance of around 15 KHz on 60 meters providing immunity from interference outside the bandpass The CHA F LOOP Antenna was designed with weight portability versatil...

Page 4: ...nd back to Earth between 300 and 2 500 miles depending upon the frequency and ionospheric conditions HF radio waves can then be reflected from the Earth to the ionosphere again during multihop propagation for longer range communication The most important thing for the operator to understand about HF radio wave propagation is the concept of Maximum Usable Frequency MUF Lowest Usable Frequency LUF a...

Page 5: ...ffective antenna for both local and long distance DX communication While not specifically designed for NVIS during field testing of the CHA F LOOP both DX and NVIS contacts were made on the 30 meter ham band within minutes of each other Parts of the Antenna The CHA F LOOP is comprised of the following components see plates 2 and 4 Plate 2 Standard CHA F LOOP Antenna a Tuning Unit The Tuning Unit a...

Page 6: ...on g Coaxial Cable Connection The Coaxial Cable Connection is a UHF socket located on the rear of the Tuning Unit a and is used to connect the Coaxial Cable k to the radio It is not used in the High Efficiency CHA F LOOP Antenna configuration h Tuning Knob The Tuning Knob is located on the front of the Tuning Unit a and is used to adjust the resonant frequency of the loop The relative position of ...

Page 7: ...iator Loop b p High Efficiency Radiator Loop Connections The connections for the optional High Efficiency Radiator Loop b see plate 5 are brackets located on the rear edge of the Tuning Unit a They are not used in the Standard CHA F LOOP configuration q High Efficiency Radiator Loop Joints The High Efficiency Radiator Loop Joints see plate 5 are used to connect together the three sections of the O...

Page 8: ...nna The location can be indoors or in an outdoors area protected from the weather The location must facilitate accessibility by the operator to the Tuning Knob h The operator needs to be able to adjust the Tuning Knob while listening to the receiver activating the transmitter and observing the SWR meter If used indoors the location should also be reasonably away from switching power supplies Inter...

Page 9: ... in an outdoors area protected from the weather The location must facilitate accessibility by the operator to the Tuning Knob h The operator needs to be able to adjust the Tuning Knob while listening to the receiver activating the transmitter and observing the SWR meter If used indoors the location should also be reasonably away from switching power supplies Internet routers and other sources of e...

Page 10: ...n e on the top of the Tuning Unit 8 Place the CHA F LOOP on a table top or attach the Aluminum Base Plate m to a tripod or other antenna mount 9 Connect the Coaxial Cable Assembly l to the Coaxial Cable Connection g on the back of the Tuning Capacitor Box 10 Perform an operational test see procedure below 11 This completes installation of the Optional CHA F LOOP High Efficiency loop configuration ...

Page 11: ...on f 2 Connect the free end of the Flexible Radiator Loop to the Loop Extension Barrel Connector t 3 Connect one end of the Flexible Radiator Loop Extension s to the open Flexible Radiator Loop Connection from step 1 4 Form the Flexible Radiator Loop Extension into a loop like the Flexible Radiator Loop 5 Attach the top of the Flexible Radiator Loop Extension to the Faraday Loop c using a Faraday ...

Page 12: ...nna Directivity 5 Transmit a carrier and gradually turn the Tuning Knob counterclockwise and then clockwise around the highest receive signal point found in step 3 to obtain the lowest SWR An SWR of 1 5 1 or less is satisfactory Your hand may slightly influence the resonance of the loop while turning the Tuning Knob This is completely normal and you may have to touch up the adjustment slightly The...

Page 13: ...r coupler with this antenna Accessories The following accessories are available for purchase from Chameleon Antenna TM Please contact us at support chameleonantenna com for current prices and availability High Efficiency Radiator Loop A high efficiency 1 collapsible aluminum tubing radiator loop which increases efficiency an average of 142 over the standard flexible radiator loop is available as a...

Page 14: ...n a minimum of time and space CHA V2L Mobile Antenna The CHA V2L is a rugged multiband HF antenna designed for smaller vehicles CHA VHF UHF Magnetic Mount Mobile Antenna The CHA VHF UHF is a simple but great dual band antenna for 2M and 70CM CHA Hybrid Mini Portable HF Antenna Base The CHA HYBRID MINI Base is the portable version of the regular HYBRID The unit can be differentiated by the color of...

Page 15: ...he 1 8 54 MHz band without any adjustment with most modern external antenna tuners No masts or guying are required CHA TD Tactical Dipole The CHA TD Tactical Dipole Antenna has been designed as an add on for the CHA F LOOP The CHA TD is a HF broadband antenna specially designed for portable HF communication where rapid deployment and simplicity of operation is essential The antenna will operate at...

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