The F-LOOP was designed with weight, durability, portability, versatility and cost in mind.
The unique craftsmanship of the CHA F-LOOP distinguishes itself from the competition. The antenna is built to last.
The unit covers everything between 10M to 60M (or 29,700MHz to 5,300MHz) continuously.
A single switch is used to tune the F-LOOP from 10M to 30M or from 40M and 60M.
The F-LOOP can be assembled and operated under 3 minutes.
The unit radiator is made of LMR-400.
The Faraday coupling loop is made of an aluminum bar which is supported by a proprietary screw together hardline feeder.
Our specially and uniquely designed hardline feeder prevents SWR fluctuations if the antenna is rotated or moved on itself which greatly facilitated antenna tuning & operation.
The base of the unit is equipped with an anodized aluminum plate for tripod assembly and for table top stability.
The F-LOOP antenna is fed from the rear of the unit by a SO-239 with the provided coax cable.
The provided 12’ coax cable is equipped with an integral RFI choke that will prevent or eliminate any possible RFI problems.
The front panel of the tuning unit is made of a clear piece of polycarbonate which protects the tuning quadrant indicator.
The unassembled antenna comes into a high quality MOLE tactical bag for easy carry and storage.
Each side of the tuning unit has been fitted with a custom designed aluminum “L” shaped bracket that will be used to hold the optional 36” diameter collapsible aluminum loop radiator.
The optional 36” diameter collapsible loop radiator is made of 1” aluminum pipe. Each joints of the collapsible loop are made of high tolerance aluminum connectors that minimize RF losses. With that collapsible loop the F-LOOP will cover 10M to 40M.
The optional 36” diameter collapsible loop radiator greatly increase antenna radiation by an average of 114%. (http://www.aa5tb.com/aa5tb_loop_v1.22a.xls)
| Frequency | A Loop Diameter (29.28″) & Radiator Diameter (0.404″) Efficiency |
B Loop Diameter (36″) & Radiator Diameter (1″) Efficiency |
Efficiency Ratio of B compared to A |
| 28.850 | 83.488% | 95.808% | 14.76% |
| 24.940 | 75.229% | 93.305% | 24.03% |
| 21.225 | 63.329% | 88.796% | 40.21% |
| 18.118 | 49.810% | 81.996% | 64.62% |
| 14.174 | 29.596% | 65.861% | 122.53% |
| 10.125 | 11.463% | 37.273% | 225.16% |
| 7.150 | 3.697% | 14.955% | 304.74% |
EASY TUNING
1 – PEAK SIGNAL IN RECEIVE WITH THE TUNING KNOB.
2 – ADJUST MINIMUM SWR IN TRANSMIT
3 – REPEAT THESE STEPS WHENEVER CHANGING FREQUENCY.
Specifications:
Frequency: 10M – 60M
Power: 10W CW or 25W SSB
RF Connection: SO-239
Weight: TBA
Price $365.00
The antenna system consists of:
1 X CHA F-LOOP Matching Box
1 X LMR-400 Coax Cable
1 X 12′ RG58A + Integrated RFI Choke
1 X Coupling Loop
1 X Screw Together Hard-Line
1 X Molle Bag
Recent Posts
New 18W High-power Baofeng UV9R-ERA Walkie Talkie
Specifications: Dual band two way radio with build-in 9500mAh li-ion battery power supply. 128 groups channels storage, with function of voice COMP CT... Read more
CE9/SQ1SGB shortly at Halley VI (WAP GBR-37)
Seba SQ1SGB has informed to leave on mid December 2019 to Antarctica. He will sign CE9/SQ1SGB and will stay at Halley VI Base (WAP GBR-37). Seba has... Read more
Apply now to run GB19YOTA
Youngsters on the Air (YOTA) Month takes place each December to encourage youngsters to get on the air and to learn more about the practical side of t... Read more
IC-9700 ’s new firmware has been released.
This makes it possible to send, receive and show pictures by the IC-9700 itself. Pictures stored on your smartphone or other device can be sent thro... Read more
Japan introduced its entry level Class 4 licence
Japan introduced its entry level Class 4 licence in the the late 1950’s, it would prove to be the world’s most successful category of amat... Read more
HF/6m linear amplifier 1200W with 5″ touch screen control heat pipes cooling system
his a ready power amplifier. You will need a power supply only! Water-cooled hermetically. You can turn the power amplifier. The water will not flow.... Read more
Hawaii ARES Leverages Contest Station and Winlink for 2019 Simulated Emergency Test
ARES volunteers in Hawaii took the opportunity of the 2019 Simulated Emergency Test (SET) on October 6 (UTC) to test Winlink radio messaging to the US... Read more
Tokelau Islands ZK3A DXpedition Ceases Operation Early
Due to the illness of a ZK3A Tokelau Islands DXpedition team member, the operation has shut down a couple of days ahead of schedule. “ALL TEAM MEMBERS... Read more
Lynyrd Skynyrd Founding Member Larry Junstrom, K4EB, SK
Southern Rocker Larry “LJ” Junstrom, K4EB, died on October 6. He was reported to be 70. Junstrom was a founding member and bassist of Lynyrd Skynyrd,... Read more
Anna Brummer, N2FER, Feted on her 105th Birthday
When she turned 80, Anna Brummer, N2FER, of Fort Edward, New York, predicted she would live to be 100. On September 27, she topped her own forecast by... Read more
MFJ-223 Vector Impedance Antenna Analyzer
MFJ-223 1-60 MHz Color Graphic VNA Analyzer Pocket-Size, Incredible Performance! Truly accurate SWR, R, X and Z! This pocket-sized wonde... Read more
N0AX Wins the October QST Cover Plaque Award – Impedance Matching Circuits
The winning article for the October 2019 QST Cover Plaque award is “About Impedance Matching Circuits” by Ward Silver, NØAX. The QST Cover Plaque Awar... Read more
ISS SSTV Oct 9 and 10 – On Air
Russian cosmonauts are expected to activate Slow Scan Television (SSTV) image transmissions on 145.800 MHz FM from the International Space Station on... Read more
IARU Region 2 agrees to 15m satellite allocation
PHOTO: ES5TV The 20th General Assembly of IARU Region 2 in Lima Peru ended on Wednesday, October 3, 2019. Participating in the Assembly were a total o... Read more
QRPGuys 40/30/20m DSB Digital Transceiver – $40
Have you ever wanted to try the new digital modes on a budget? The QRPGuys DSB Digital Transceiver is a low cost, multiband, DSB transceiver kit, curr... Read more
FCC Proposes Fining New York Radio Amateur $17,000 for Deliberate Interference
A New York Radio Amateur — Harold Guretzky, K6DPZ, of Richmond Hill — is facing a $17,000 fine imposed by the FCC. Guretzky was issued a Notice of App... Read more
IARU Region 1 UHF & Up Contest
The IARU Region 1 UHF & Up Contest will be held this weekend on 5 and 6 October 2019. The contest starts at 14.00 UTC. You are kindly invited to p... Read more
FCC Dismisses Three Petitions for Rule Making Filed by Radio Amateurs
The FCC has dismissed petitions for rule making filed in 2018 by three radio amateurs. All of the petitions were put on public notice earlier this yea... Read more
Jamboree on the Air (JOTA) Registration is “On Track”
With just a couple of weeks to go before Scouting’s Jamboree on the Air (JOTA) event on October 18 – 20, JOTA Coordinator Jim Wilson, K5ND, reports th... Read more
California declares Ham Radio no longer a benefit, severs ties across the state.
The California state government through an unelected official has severed ties to ham radio repeater owners throughout the state. putting countless li... Read more
ARISS Invites Proposals to Host Ham Radio Contacts with Space Station Crew
The Amateur Radio on the International Space Station (ARISS) Program is seeking formal and informal education institutions and organizations — individ... Read more
Australian Regulator Reinstates US Amateur Radio License Reciprocity
The Wireless Institute of Australia (WIA) reports Australia’s communications regulator ACMA is reinstating the reciprocal arrangement for US Amateur R... Read more
