OCF40 · Coax & RF Connections
A coaxial cable, connector, adapter, choke, or RF interconnect.
Why operators make room for it
Finish the RF path without building in a weak link
The space between the feedpoint and the radio is not empty—it is an RF path the operator must build deliberately.
That is where CHA OCF40 enters the kit. The OCF40 Medium Power Antenna is a very lightweight and backpackable medium power antenna -- intended for extreme portable use, such as: Parks On the Air (POTA), Summits On the Air (SOTA), and other outdoor QRP radio adventures where an effective antenna is required.
That preparation gives the operator a cleaner, more dependable feed-line plan while keeping connector, loss, frequency, power, routing, and weather limits visible.
Quick product reference
Key Specifications
- Product type
- Coax & RF Connections
- Primary role
- A coaxial cable, connector, adapter, choke, or RF interconnect.
- Available color
- Blue
- Green
- Yellow
- Orange
- Available style
- CHA OCF40 - WITH COAX
- CHA OCF40 - NO COAX
- CHA OCF40 - BALUN ONLY
- Frequency Range
- No tuner: 40, 20, 10, and 6 meter Amateur Radio Service bands. 60, 30, 17, 15, and 12 meters with a tuner.
- Length
- Approximately 66 ft.
- Weight
- 0.08 lbs
- Power Handling
- 50W SSB, 25W CW and all other modes
- Swr
- Typically, less than 2.2:1 on covered bands
- Color
- Subdued - mostly green, brown, and black
- Setup Time
- One operator, approximately 15 minutes
- Published package contents
- 1 X Matching Transformer
- 1 X Antenna Wire 44’5” w/ Isolation Ring
- 1 X Antenna Wire 22’1”w/ Isolation Ring
- 1 X SM Winder
- 1 X OD Pouch
- Selection rule
- Match connector type, cable length, frequency, power, and weather exposure
- System rating
- The lowest applicable component rating governs
Operator decision support
Plan the complete setup
See what this product is best suited for, what the documented setup needs, and the boundaries to confirm before deployment.
- Best for
The space between the feedpoint and the radio is not empty—it is an RF path the operator must build deliberately.
- What’s included
- 1 X Matching Transformer
- 1 X Antenna Wire 44’5” w/ Isolation Ring
- 1 X Antenna Wire 22’1”w/ Isolation Ring
- 1 X SM Winder
- 1 X OD Pouch
- What else you need
Match connector type, cable length, frequency, power, and weather exposure
- Limitations
Carefully roll (do not twist) the Coaxial Cable.
- Expansion options
Coaxial Cable. 25 ft. of lightweight RG-316 Coaxial Cable with an integrated RFI Choke is available as a recommended option for the CHA OCF40
What an operator can do
- Match connector gender and type at both ends without forcing or cross-threading the connection.
- Route coax with strain relief, a suitable bend radius, and weather protection where required.
- Use the lowest power, frequency, loss, and environmental rating that applies to the complete RF path.
Complete product details
The OCF40 Medium Power Antenna is a very lightweight and backpackable medium power antenna -- intended for extreme portable use, such as: Parks On the Air (POTA), Summits On the Air (SOTA), and other outdoor QRP radio adventures where an effective antenna is required.
Chameleon Antenna designed the OCF40 to complement the new generation of small multi-band/multi-mode QRP transceivers, like the Icom IC-705, Xiegu G90 or X6100, LAB 599 TX500, or the Yaesu FT-817/818.
The OCF40 antenna works without a tuner on the 40, 20, 10, and 6 meter Amateur Service Bands and with a tuner on 60, 30, 17, 15, and 12 meters - enabling operation on the most popular POTA and SOTA bands.
The OCF40 includes a lightweight matching transformer, a total of 66 feet of 20 gauge antenna wire in two segments, a line winder, and a storage pouch. 25 ft. of RG316 coax w/RFI choke and BNC connectors is available as a lightweight coax option, - just add a lightweight telescoping pole or a convenient tree and you’re on the air. Having an effective antenna for POTA and SOTA has just become very simple with the OCF40!
CONSIST OF:
- 1 X Matching Transformer
- 1 X Antenna Wire 44’5” w/ Isolation Ring
- 1 X Antenna Wire 22’1”w/ Isolation Ring
- 1 X SM Winder
- 1 X OD Pouch
Specifications
- Frequency Range: No tuner: 40, 20, 10, and 6 meter Amateur Radio Service bands. 60, 30, 17, 15, and 12 meters with a tuner.
- Power Handling: 50W SSB, 25W CW and all other modes.
- Length: Approximately 66 ft.
- Weight: 0.08 lbs
