Chameleon Antenna CHA F-LOOP Operator'S Manual Download Page 15 | Manualshive

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Chameleon Antenna CHA F-LOOP Operator'S Manual Download Page 15

CHA F-LOOP

Page 15

the  entire  antenna  length  is  less  than  29”.  The  5
aluminum  sections  are  hold  together  by  a  piece  of
1/8th inch US GI MIL SPEC shock cord.  The CHA MIL
Whip  and  a  CHA  HYBRID-MINI  Base  perfectly
complements the capability of the CHA F-LOOP.

CHA MIL EXT Whip Extension -

The CHA MIL EXT

whip  has  been  designed  to  offer  maximum
portability and performance  for those already using
the  portable  CHA  MIL  whip  for  man-pack  antenna
system.  This collapsible antenna extension needs to
be  used  with  the  CHA  MIL  to  create  a  17’4”  long
portable antenna. When combined with any HYBRID
series antenna bases the CHA MIL EXT will operate at
all frequencies in the 1.8-54  MHz  band without  any
adjustment  with  most  modern  external  antenna
tuners.

CHA TD Tactical Dipole LITE -

The CHA TD LITE

(Tactical Dipole LITE) is a HF broadband antenna
specially designed for portable HF communication
where rapid deployment and simplicity of operation

is essential but compactness is primordial. The
antenna will operate at all frequencies in the 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  all  frequencies  in  the  1.8-30  MHz  band
without  any  adjustment  with  most  modern  internal
antenna tuners. It is ideal for use in conjunction with
modern,  digitally  configured,  HF  communication
transceivers  where  features  such  as  ALE  and
frequency

hopping

require

true

broadband

capability.  No  masts  or  guying  are  required.    The
CHA TD can also be used  without antenna tuner, as
the  SWR  will  stay  under  2.5:1  between  10M  and
80M and under 2.75:1 on 160M.

References

1.

Silver, H. Ward (editor), 2013,

2014 ARRL Handbook for Radio Communications

, 91

st

Edition, American Radio

Relay League, Newington, CT.

2.

1987

, Tactical Single-Channel Radio Communications Techniques

(FM 24-18)

, Department of the Army,

Washington, DC.

3.

Turkes, Gurkan, 1990,

Tactical HF Field Expedient Antenna Performance Volume I Thesis

, U.S. Naval Post

Graduate School, Monterey, CA.

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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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