Chameleon Antenna CHA LEFS Operator'S Manual Download | Manualshive

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Lightweight End Fed

Halfwave Sloper

(CHA LEFS)

Operator’s Manual

Nevada - USA

WWW.CHAMELEONANTENNA.COM

VERSATILE

–

DEPENDABLE

–

STEALTH

–

BUILT TO LAST

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Summary of Contents for CHA LEFS

Page 1: ...Lightweight End Fed Halfwave Sloper CHA LEFS Operator s Manual Nevada USA WWW CHAMELEONANTENNA COM VERSATILE DEPENDABLE STEALTH BUILT TO LAST ...

Page 2: ... kill Never trust insulation to protect 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 Photographs and diagrams in this manual may vary slightly from current production units due to manufacturing c...

Page 3: ...A LEFS is also configurable to facilitate Near Vertical Incident Sky wave NVIS communication Antennas built by Chameleon AntennaTM are versatile dependable stealthy and built to last Please read this operator s manual so that you may maximize the utility you obtain from your CHA LEFS HF Propagation HF radio provides relatively inexpensive and reliable local regional national and international voic...

Page 4: ...hich successful communications between two points is predicted on 50 of the days of in a month The LUF is the frequency below which successful communications are lost due to ionospheric loses The OWF which is somewhere between the LUF and around 80 of the MUF is the range of frequencies which can be used for reliable communication If the LUF is above the MUF HF sky wave propagation is unlikely to ...

Page 5: ... and feed point of the antenna when erected and convenient storage for the Antenna Wire and Paracord when not in use b Suspension Point The Suspension Point is the large hole in the top of the Line Winder Assembly used to enable attachment of Paracord for suspending the feed point of the antenna c Antenna Wire The Antenna Wire is permanently attached to Line Winder Assembly It is comprised of 63 f...

Page 6: ...The Coaxial Cable not supplied is used to connect the antenna to the radio set RG 58 with an integrated RFI Choke such as that sold by Chameleon AntennaTM is recommended Antenna Configurations The two basic configurations for the CHA LEFS are as an End Fed Sloper and an End Fed Horizontal antenna Figure 1 shows the Sloper configuration which is the normal configuration When installed at around 25 ...

Page 7: ...cord from the Line Winder Assembly 3 Using a throw weight or some other method loop the Paracord over the support 4 Unwrap the Antenna Wire c from the Line Winder Assembly 5 Connect the Coaxial Cable to the Line Winder Assembly UHF Connector Socket e 6 Raise the Line Winder Assembly to the desired height and secure it to the support using a Round Turn and two Half Hitches or similar knot Finish In...

Page 8: ...the Antenna Wire and Loading Coil for breakage corrosion or signs of strain 2 Ensure the UHF Connector Plugs are securely tightened 3 Inspect the Coaxial Cable assembly for cuts in insulation or exposed shielding Replace if damaged 4 If still not operational connect a Standing Wave Ratio SWR Power Meter and check SWR 5 If SWR is greater than 3 1 on specified bands replace Coaxial Cable Most proble...

Page 9: ...n UHF Socket SO 239 Length 63 ft Weight 1 5 lbs Personnel Requirements and Setup Time one operator around 10 minutes Far Field Plots are shown in figures 4 and 5 Figure 3 SWR by Frequency Graph Figure 4 Sloper Far Field Plot 7 MHz ...

Page 10: ...omponents that have been damaged or modified by the customer Accessories The following accessories are available for purchase from Chameleon AntennaTM Please contact us at support chameleonantenna com for current prices and availability Coaxial Cable The CHA 50 COAX is 50 feet of high quality RG 58 cable with an integrated RFI Choke and PL 259 connectors on each end Recommended non supplied access...

Page 11: ...ortable Antenna Pioneer References 1 Silver H Ward editor 2013 2014 ARRL Handbook for Radio Communications 91st 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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