Related Manuals for Chameleon Antenna CHA 40 FD
Summary of Contents for Chameleon Antenna CHA 40 FD
- Page 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...
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Page 2: Table Of Contents
Troubleshooting ............................11 Accessories .............................. 11 Specifications ............................12 Warranty ..............................13 Chameleon Antenna Products ......................14 References .............................. 14 WARNING! Never mount this, or any other antenna near power lines or utility wires! Any materials: ladders, ropes, or feedlines that contact power lines can conduct voltages that kill. Never trust insulation to protect you. -
Page 3: Introduction
Introduction Thank you for purchasing and using the Chameleon Antenna 40 / 20 Meter Fan Dipole antenna (CHA 40/20 FD). The Fan Dipole antenna, see figure (1) and plate (1), is a High Frequency (HF) antenna designed to provide a field- tunable resonant portable antenna for two of the most popular amateur radio bands. -
Page 4: Hf Propagation
HF Propagation HF radio provides relatively inexpensive and reliable local, regional, national, and international voice and data communication capability. It is especially suitable for undeveloped areas where normal telecommunications are not available, too costly or scarce, or where the commercial telecommunications infrastructure has been damaged by a natural disaster or military conflict. -
Page 5: Parts Of The Antenna
which is the standard for interoperable HF communications, is an automated method of finding a frequency in the OWF and establishing and maintaining a communications link. Even under optimal conditions, there is a gap between where ground waves end (around 40 to 90 miles) and the sky wave returns to Earth on the first hop (around 300 miles). -
Page 6: Antenna Installation
Winders for use in field tuning the antenna. Antenna Installation The Chameleon Antenna 40/20 Meter Fan Dipole antenna can be deployed as a Flat-Top (horizontal dipole) or Inverted “V” configuration. 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”... - Page 7 Plate 3. Fan Dipole Center Connections. 6. Attach a Carabiner (h) to the Insulator (g) at the Insulator on one of the Antenna Wires, as shown center end of the other 7 MHz Antenna Wire (e). in plate (4). Repeat for the other Antenna wire. 7.
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Page 8: Field Tuning Procedure
22. Perform Field Tuning Procedure. Field Tuning Procedure The Chameleon Antenna 40 / 20 Meter Fan Dipole antenna was designed to be able to be used over a wide frequency range and installed in variety of ways in the field – all of which affect the resonant frequency of the antenna. - Page 9 Figure 3. 1 Case - Increasing SWR by frequency. CASE: The values for SWR decrease on all measurements of the lowest, middle, and highest frequencies, see figure (4). In this case, the resonant frequency is too high, which means the antenna is too short. To increase the length of the dipole, unroll wire from the Line Winder (i) at the end of each Antenna Wire (e) of the dipole.
- Page 10 In this example, the antenna is resonant between 7,000 and 7,150 KHz, so the antenna is slightly long if you want the antenna to resonate at 7,150 KHz. The spread between 7,000 and 7,150 KHz is 150 KHz and, using our rule-of-thumb from above, that is three half turns on the Line Winders –...
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Page 11: Recovery Procedure
6. Due to the construction of the BALUN, it cannot be tested using a Multi-Meter as it will read as a DC short. This is normal and does not indicate a problem with the BALUN. 7. If still not operating correctly, contact Chameleon Antenna for technical support: support@chameleonantenna.com. -
Page 12: Specifications
• Coaxial Cable. A 50-foot length of RG-58 coaxial cable with an integrated RF choke is available for purchase. Specifications • Frequency: 7 and 14 MHz Amateur Radio Service frequencies. • SWR: Field tunable for resonance, 2.0 or less over a 300 KHz bandwidth, see figures (6) and (7). •... -
Page 13: Warranty
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 and return the system to you at no charge. We encourage you to call us for technical support before returning the antenna. -
Page 14: Chameleon Antenna Tm Products
Products Please go to http://chameleonantenna.com for information about additional quality antenna products available for purchase from Chameleon Antenna – The Portable Antenna Pioneer. References 1. Silver, H. Ward (editor), 2013, 2014 ARRL Handbook for Radio Communications, 91 Edition, American Radio Relay League, Newington, CT.