LEFS 4010 (Lightweight End Fed Sloper) EFHW · Wire Antennas
A wire radiator or wire antenna system for documented horizontal, sloping, inverted-V, inverted-L, dipole, or NVIS use.
Why operators make room for it
Put useful wire in the air without carrying a permanent tower
A field site may offer height, distance, or concealment—but rarely all three in exactly the right places.
That is where CHA LEFS 4010 (Lightweight End Fed Sloper) EFHW enters the kit. Introducing the Chameleon Antenna Lightweight End Fed Sloper ( LEFS) 4010 : a versatile HF antenna designed to enhance your outdoor radio experiences. This antenna operates across four bands – 40, 20, 15, and 10 meters – in the Amateur Radio Service (ham), expanding to seven bands with a tuner.
That flexibility gives an operator a credible path from a compact field kit to a full-size radiator, while the official configuration still governs feedpoint, support, tuning, and safety choices.
Quick product reference
Key Specifications
- Product type
- Wire Antennas
- Primary role
- A wire radiator or wire antenna system for documented horizontal, sloping, inverted-V, inverted-L, dipole, or NVIS use.
- Available style
- NO COAX
- RG-316 (25' with RFI CHOKE)
- Power
- 100W SSB, 50W CW, 25W DATA
- Rf Connection
- BNC Socket
- Length
- 65 ft Tinned Copper PTFE (Teflon) (-70°C to 150°C)
- Weight
- 1.0 lbs
- Frequency
- o 7.0 - 7.3 MHz (40m) o 10.1-10.15 MHz (30m) with optional CHA WARC-D or CHA LINK-D dipole wire sets. o 14.1 - 14.35 MHz (20m) o 18.068-18.168 MHz (17m) with optional CHA WARD-D dipole wire set. o 21.0 – 21.45 MHz (15m) o 24.890-24.990 MHz (12m) with optional CHA WARD-D dipole wire set. o 28.0 – 29.7 MHz (10m)
- Swr (Frequency Ranges Listed Above)
- Less than 2.0:1. The SWR graph for the EFHW Antenna is shown in
- Published package contents
- 1 X CHA LEFS (≈65' long - 20 Gauge Tinned Copper PTFE (Teflon) (-70°C to 150°C) wire)
- 1 X OD Pouch
- Deployment role
- Documented wire-antenna configuration
- Support requirement
- Height, insulation, load, and guying depend on the completed deployment
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
A field site may offer height, distance, or concealment—but rarely all three in exactly the right places.
- What’s included
- 1 X CHA LEFS (≈65' long - 20 Gauge Tinned Copper PTFE (Teflon) (-70°C to 150°C) wire)
- 1 X OD Pouch
- What else you need
- CHA PARACORD-50
- CHA TENT Stakes
- CHA THROW BAG
- Slick String
- Limitations
- Never mount this, or any other antenna near power lines or utility wires!
- Never trust insulation to protect you.
- 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.
- Expansion options
- CHA LINK-D
- CHA WARC-D
- CHA LINK-D15
What an operator can do
- Select a documented horizontal, sloping, inverted-V, inverted-L, dipole, or NVIS arrangement.
- Raise the wire with a support that satisfies the antenna guide's height, load, insulation, and guying limits.
- Keep balanced dipole configurations symmetrical and do not add radial or counterpoise accessories unless the guide explicitly requires them.
Complete product details
40M 20M 15M and 10M - No Tuner Needed
Introducing the Chameleon Antenna Lightweight End Fed Sloper (LEFS) 4010: a versatile HF antenna designed to enhance your outdoor radio experiences. This antenna operates across four bands – 40, 20, 15, and 10 meters – in the Amateur Radio Service (ham), expanding to seven bands with a tuner. Whether you're into Parks on the Air (POTA), Summits on the Air (SOTA), hiking, biking, or other outdoor adventures, the LEFS 4010's compact form, light weight, and broad band coverage make it an optimal choice. Forget about carrying a tuner and SWR meter; simply pack your radio and the LEFS 4010, and embark on activating parks or summits effortlessly.
Tailored for outdoor pursuits, the LEFS 4010 boasts an End Assembly that's lightweight and equipped with an integrated line winder. Its high-efficiency impedance matching network transformer (49:1), ultra-thin 20 gauge antenna wire, and micro-size RG-316 coaxial cable (Optional) establish the LEFS 4010 as the perfect companion for pocket-sized QRP (LOW-POWER 100W SSB & 50W CW & 25W DATA) transceivers. Installation is a breeze, with no need for a tuner or ongoing adjustments on the entire 40, 20, 15, and 10 meter ham bands (extendable to 30, 17, and 12 meters with a tuner).
When it's time to hit the trail, you'll appreciate the LEFS 4010's space-saving design. Measuring only 6 1/2 inches in length, 3 3/4 inches in width, and weighing a mere 1.1 pounds, it won't burden your backpack. Versatile usage options abound – attach it to a lightweight telescopic fishing or kite pole to deploy it as a Sloper. Additionally, it can be configured to facilitate Near-Vertical Incident Skywave (NVIS) communication.
Antennas crafted by Chameleon Antenna are not only dependable but also versatile, stealthy, and engineered for durability. To make the most of your LEFS 4010, be sure to peruse the operator's manual. Elevate your outdoor radio endeavors with the LEFS 4010's exceptional performance and convenience.
It can be installed permanently.
Specifications:
-
Frequency:
- 7.0 - 7.3 MHz (40m)
- 14.1 - 14.35 MHz (20m)
- 21.0 – 21.45 MHz (15m)
- 28.0 – 29.7 MHz (10m)
- SWR (frequency ranges listed above): Typically, less than 2.0:1
- Power: 100W SSB, 50W CW, 25W DATA
- RF Connection: BNC Socket
- Length: 65 ft Tinned Copper PTFE (Teflon) (-70°C to 150°C)
- Ratio 49:1
- Weight: 1.0 lbs
The Antenna Kit Consists of:
- 1 X CHA LEFS (≈65' long - 20 Gauge Tinned Copper PTFE (Teflon) (-70°C to 150°C) wire)
- 1 X OD Pouch
- OPTIONAL:
- 1 X RG-316 (25' with RFI Choke) or RG58 with RFI Choke in 50,75 or 100 ft. lengths.
- 1x BNC Male to SO239 Adapter
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