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CHA 40/20 FD 

Page 6 

 

g.

 

Insulator

.  The Insulators are located at each end of the Antenna Wire.  They are used to electrically 

isolate and mechanical attach the Antenna Wires. 
 

h.

 

Carabiner.

  The two Carabiners are used to mechanically attach the center end of the Antenna Wires to 

the BALUN, providing strain relief. 

 

i.

 

Line Winder.  

The Line Winder is used to store the Antenna Wires and enables rapid deployment and 

recovery of the Fan Dipole antenna.   
 

j.

 

Paracord.

  

(not supplied)

 Four 25-foot lengths 

of nylon kernmantle line, “Paracord”, are recommended to

 

attach the ends of the Antenna Wires to Tent Stakes or other supports (such as trees or fence posts) 
enabling installation versatility. 
 

k.

 

Coaxial Cable.

  

(not supplied)

 The Coaxial Cable is used to connect the Fan Dipole to the Radio Set.  The 

Coaxial Cable must have a 50 Ohm impedance and UHF Plugs (PL-259) on each end.   
 

l.

 

Mast.

  

(not supplied)

 Installation of this antenna requires a Mast or other fixed vertical support (such as a 

tree) around 20 feet in height near the center of where the antenna will be located.  The Mast may be 
made from any sufficiently rigid material. 
 

m.

 

Tent Stake.  

(not supplied)

 Four Tent Stakes are recommended to attach the ends of the Antenna Wires to 

the ground when using the Inverted “V” configuration.

 

 

n.

 

Bongo Ties. 

 

(supplied, but not shown)

 Four handy elastic tie wraps are included to wrap around the Line 

Winders for use in field tuning the antenna.

 

 
Antenna Installation 

The Chameleon Antenna

TM

 40/20 Meter Fan Dipole antenna can be deployed as a Flat-Top (horizontal dipole) or 

Inverted “V” co

nfiguration.  An operationally useful configuration would be to install the 40m antenna as a Flat-Top 

at a height of around 15 

feet to maximize NVIS propagation and the 20m antenna as an Inverted “V” to maximize 

long distance skywave propagation.  The instructions below assume both antennas will be installed as an Inverted 

“V”, which is the easiest configuration for portable operation since it requires only one 

center support.   

 
Refer to plate (2) for the following steps.  

Note that plate (3) only shows one side of the dipole antenna connected to 

the BALUN to simplify the detail shown in the photograph.

   

1.

 

Attach a Carabiner (h) to the Insulator (g) at the 
center end (the end with the Spade Lug), of one 
of the 7 MHz Antenna Wires (e). 

2.

 

Attach the Carabiner to the Top Eyebolt (b). 

3.

 

Attach the Insulator at the center end of one of 
the 14 MHz Antenna Wires to the Carabiner from 
the previous step. 

4.

 

Connect both of the Spade Lugs (f) from steps (1) 
and (2) to the same Antenna  Connection (c) on 

one side of the BALUN (a) by placing a spade lug 
around  the  bolt  on  each  side  of  the  washer, 

forming a “V”, as shown in plate (

3).  Tighten the 

wing nut finger tight. 

5.

 

Using a Bowline or similar knot, attach the end of 
one  of  the  lengths  of  Paracord  (j)  to  the  end 
Insulator on one of the Antenna Wires, as shown 
in plate (4).  Repeat for the other Antenna wire. 

 

Содержание CHA 20 FD

Страница 1: ...40 20 Meter Fan Dipole Antenna CHA 40 20 FD Operator s Manual Nevada USA WWW CHAMELEONANTENNA COM VERSATILE DEPENDABLE STEALTH BUILT TO LAST...

Страница 2: ...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 MH...

Страница 3: ...nna Without an antenna tuner the Fan Dipole can operate on the 40 and 20m amateur radio bands A wide range antenna tuner will also enable operation on the 17 15 12 and 10m bands Figure 1 Fan Dipole An...

Страница 4: ...are the primary method of HF radio wave propagation HF radio waves on a frequency below the critical frequency found by an ionosonde are reflected off one of the layers of the ionosphere and back to...

Страница 5: ...r is used to match the antenna and coaxial cable preventing feedline radiation The BALUN is also used as the mechanical and electrical center attachment points for the antenna b Top Eyebolt The Top Ey...

Страница 6: ...uded to wrap around the Line Winders for use in field tuning the antenna Antenna Installation The Chameleon AntennaTM 40 20 Meter Fan Dipole antenna can be deployed as a Flat Top horizontal dipole or...

Страница 7: ...other Antenna wire 11 Connect the Coaxial Cable to the Coaxial Cable Connection d on the bottom of the BALUN 12 Raise the BALUN to near the top of the Mast k or other support Figure 2 show a typical...

Страница 8: ...and installed in variety of ways in the field all of which affect the resonant frequency of the antenna Use this simple field tuning procedure to quickly and easily adjust the resonant frequency for e...

Страница 9: ...you can say that the antenna is resonating close to 150 KHz too low Using our rule of thumb from above you would take three half turns off the Line Winder Figure 4 2nd Case Decreasing SWR by frequency...

Страница 10: ...000 KHz we should add just one half turn on the Line Winders to increase the resonant frequency of the dipole to around 7 150 KHz Some trial and error may be necessary but remember as long as the SWR...

Страница 11: ...on some frequencies indicate a tuning issue perform the Field Tuning procedure 3 Check the Antenna Wire Spade Lug connections on the sides of the BALUN to make sure they are tightly connected and free...

Страница 12: ...figures 6 and 7 Power Handling 150 Watts Space Required An area 54 feet in length and 40 feet in width and have or be able to accommodate a 20 foot mast or other vertical support near the center of th...

Страница 13: ...f 12 months from the date of purchase To obtain warranty service return all components of the system to Chameleon Antenna at your expense Chameleon Antenna will repair or replace defective components...

Страница 14: ...Portable 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 C...

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