Chelegance KC4 Specs
| HF Vertical Antenna Type | Multi-band resonant vertical |
| Frequency Range | 7 / 14 / 21 / 28 MHz (40m / 20m / 15m / 10m) |
| Antenna Height | 7.8 m (25.6 ft) |
| Antenna Weight | Approx. 6.8 kg (15.4 lb) |
| Main Rod Inner Diameter | 1.6 inches (4.1 cm) |
| Impedance | 50 Ω |
| VSWR | < 1.5 : 1 |
| Bandwidth | 40m:150kHz / 20m:450kHz / 15m:800kHz / 10m:1000kHz |
| Maximum Power Handling | 1000 W PEP (SSB 400 W / CW 200 W / Digital 100 W) |
| Connector Type | UHF Female (SO-239) |
| Mounting Type | Mast mount |
| Mount Material | Aluminum |
| Mounting Position | Elevated |
| Rated Wind Speed | 35 m/s (78 mph) |
| Package Dimensions | 0.46 × 0.46 × 3.9 ft |
| Quantity | Sold as a kit |
| U-Clamps Capacity | Up to 50 mm (2.0 in) mast diameter |
Note: Actual wind resistance depends on mast strength and installation method.
In the Box:
- 1 x Main support (1.6*0.15*0.01ft)
- 12 x Radials
– Long: 10 × 9 ft
– Short: 2 × 1.6 ft - 1 x Antenna body NO:1 (Long: 3.9ft)
- 1 x Antenna body NO:2 (Long: 3.9ft)
- 1 x Antenna body NO:3 (Long: 3.9ft)
- 1 x Antenna body NO:4 (Long: 1.1ft)
- 1 x Antenna body NO:5 (Long: 3.5ft)
- 1 x Antenna body NO:6 (Long: 0.9ft)
- 1 x Antenna body NO:7 (Long: 2.4ft)
- 1 x Antenna body NO:8 (Long: 1ft)
- 1 x Antenna body NO:9 (Long: 3.9ft)
- 1 x Antenna body NO:10 (Long: 3.9ft)
- 1 x Matching box
- 2 x U clamps
- 1 x Tools bag
Frequently Asked Questions
Q: What is the recommended installation height?
A: Approximately 1.5 meters (5 ft), which is the factory tuning reference.
Q: Can I install KC4 on a rooftop or tower?
A: Yes. KC4 can be installed on rooftops, poles, or towers. However, installation height will affect resonance, and retuning is usually required after installation.
Q: Will installation height affect performance?
A: Yes. Changes in height can shift the resonance frequency and SWR. Always check and adjust after installation.
Q: Do I need guy ropes?
A: Normally not required. For windy environments, insulated ropes can be used. Avoid using metal materials.
Q: Does KC4 require radials or grounding?
A: KC4 does not require traditional ground radials. However, proper grounding or a counterpoise can help improve stability and reduce noise.
Q: Do I need an antenna tuner (ATU)?
A: No. KC4 is designed to be resonant on all supported bands. However, a tuner can be used for fine adjustment if needed.
Q: What is the maximum power rating?
A: Up to 500W CW under optimal conditions.
For long-term use, we recommend ≤200W CW and ≤100W for digital modes.
Q: Are all bands resonant?
A: Yes. When properly tuned, KC4 operates as a resonant antenna on all supported bands and typically does not require an external tuner.
Q: Why does SWR increase during rain?
A: This is normal. Moisture on the antenna temporarily affects its electrical characteristics. Once dry, SWR usually returns to normal.
Q: My SWR is high — what should I check?
– All bands high → Check assembly, coax cable, and connectors
– Only one band high → Check tuning and related components for that band
– SWR changed after installation → Retuning is required
– SWR changes with weather → This is normal
Q: What should I keep in mind during tuning?
A: Make adjustments in small increments (a few millimeters to 1 cm) and re-measure SWR after each step. Avoid large adjustments, as they may cause overshooting the target frequency.
Q: What should I pay attention to during installation?
– Keep the antenna away from large metal objects
– Avoid installing too close to walls or railings
– Ensure all connections are securely tightened
– Re-check SWR after installation changes