Included
- CHA EMCOMM III matching unit
- 130 ft antenna wire
Base-station HF end-fed wire antenna
A 130 ft broadband end-fed wire for permanent or semi-permanent HF installations.
Built for a real operating goal
Give a home, base-camp, or emergency station one full-size broadband HF wire
CHA EMCOMM III BASE is built for operators who can devote real space to a durable 130-foot radiator and want broad HF access without maintaining a collection of separate resonant wire antennas.
Install it horizontally, as a sloper, or in another guide-defined end-fed geometry, then pair the completed installation with the required tuner and feed system. The long radiator makes this the fixed or semi-permanent EMCOMM III choice; it is not the 73-foot portable model.
- Frequency3.5–30 MHz continuous; 1.8–3.5 MHz usable with reduced performance
- Radiator130 ft tinned-copper Kevlar-reinforced PTFE wire
- Matching5:1 matching unit
- Power200 W SSB, 100 W CW, 100 W digital
Picture the setup before you buy
See how this antenna works in the field
This official installation reference makes the antenna’s footprint, component order, and deployment style easier to understand at a glance.
Complete product reference
Key specifications
- Frequency
- 3.5–30 MHz continuous; 1.8–3.5 MHz usable with reduced performance
- Radiator
- 130 ft tinned-copper Kevlar-reinforced PTFE wire
- Matching
- 5:1 matching unit
- Power
- 200 W SSB, 100 W CW, 100 W digital
- Typical SWR
- Less than 2.8:1; frequency and configuration dependent
- Setup
- One trained operator, typically under 30 minutes
Know the complete setup before you transmit
Included equipment and documented configurations
Documented configurations
- Horizontal end-fed wire
- Sloper
- Inverted-L
- Only other arrangements diagrammed in the current guide
Configuration boundary: This is the BASE version. Do not substitute the Portable version’s 73 ft radiator and 25 ft counterpoise topology. Use the guide-defined grounding, support, tuner, and feed-line practices.
Coverage & Pattern
See the reviewed 2D and interactive 3D patterns
Use only a model that matches this exact antenna configuration, band, height, ground, feed, and RF return. The normalized simulations do not establish installed SWR, efficiency, realized gain, range, tuning, loss, or field performance.
