Need help?Do you have a question about the CUSHCRAFT A4S and is the answer not in the manual?
Critical warnings about electrical hazards, injury, and contact with power lines during installation and operation.
Guidance on careful planning, qualified helpers, and selecting an optimal, obstruction-free location for the antenna.
Instructions for mast mounting, rotator selection, and essential system grounding for lightning and static protection.
Introduction to the assembly process and the tuning procedure, including VSWR checks for performance verification.
Information about the A744 add-on kit for expanding the antenna's band coverage to 30 or 40 meters.
Comprehensive list of all parts and quantities required for the A4S antenna assembly.
Detailed steps for assembling the main boom structure of the antenna using specified components and hardware.
Instructions for assembling the antenna elements, including trap placement and dimension setting based on band charts.
Guidance on attaching elements to the boom, leveling them, and ensuring correct trap orientation for optimal performance.
Instructions for creating and attaching an RF choke to the driven element to prevent feedline interaction.
Steps for securely attaching the assembled antenna boom to the supporting mast using the mounting plate and U-bolts.
Detailed technical specifications for the A4S antenna, including frequency ranges, gain, bandwidth, and dimensions.
Details the Cushcraft Corporation's one-year limited warranty, coverage, exclusions, and purchaser rights.
Frequency and Gain| frequency ranges | 28, 21, 14 |
|---|---|
| forward gain | 8.9 dBd |
| front to back ratio | 25 dB |
Power and Bandwidth| 2:1 bandwidth | >500 KHz |
|---|---|
| power rating | 2000 Watts PEP |
| 3 dB beam width | 58 Deg. E Plane |
Dimensions and Weight| boom length | 18 ft (5.48 m) |
|---|---|
| boom diameter | 2 in (5.10 cm) |
| longest element | 32 ft (9.75 m) |
| element center diameter | 1.25 in (3.18 cm) |
| turning radius | 18.4 ft (5.49 m) |
| mast size range | 1.25-2 in (3.18-5.08 cm) |
| wind load | 5.50 ft² (0.51 m²) |
| weight | 37 lb (16.8 kg) |
To Next Page