ALPHA DELTA DELTA-4B-N Surge Protected Coax Switch
Best high-frequency coax switch for protecting sensitive radio equipment from surges.
Protect your valuable equipment with the Alpha Delta DELTA-4B-N Coax Switch. This robust 50 Ohm switch is rated up to 1.3 GHz and features four positions, with two on each side of the common connector. It includes an integrated, replaceable Model D-4 surge protector for lightning protection. The switch grounds all antenna circuits in the center position and grounds unused ports when active, while continuously protecting the active circuit. Proper external grounding is essential for optimal performance.
$149.95
Owner Satisfaction
4.5
/ 5
Category Rank
24
/ 54
#24 in Antenna Accessories
Price vs Category Average
-14%
Below average
Switch Positions
Four (two on each side of center)
/ Four (two on each side of center)
Who it's for
- Radio operators protecting expensive equipment from lightning damage
- Amateur radio enthusiasts running high-power transmission setups
- Station managers needing to organize multiple antennas and radios
Who should skip it
- Users with existing cables using standard UHF connectors
- Budget-conscious hobbyists seeking a basic, low-cost switching solution
- Operators preferring a maintenance-free, set-and-forget hardware installation
Performance breakdown
Surge Protection
Integrated gas tube technology provides essential defense against damaging electrical surges.
Signal Integrity
Maintains low VSWR and high isolation for clean, reliable signal transmission.
Build Quality
Rugged construction ensures long-term durability in demanding amateur radio station environments.
Frequency Versatility
Capable performance across a wide spectrum reaching up to 1.3 GHz.
Grounding Reliability
Automatic grounding of unused ports adds a critical layer of safety.
Operational Ease
Intuitive four-position layout makes switching between multiple antennas quick and simple.
Key Specs
Switch Positions
Four (two on each side of center)
Impedance
50 Ohms
Frequency Range
Rated through 1.3 GHz
Surge Protection
Internally mounted Model D-4 gas tube
VSWR at 450MHz
<1.4:1
Isolation at 30MHz
>60dB
Protection Indicators
Protection Indicator Light
Data Line Protection Type
Coaxial Protection
Features
- 4-Position Type-N switch up to 1.3 GHz
- Built-in replaceable surge protector
- Grounds all antennas in center position
- Grounds unused ports during switching
- Continuous protection for active circuit
- Designed for 50 Ohm systems
- Excellent isolation and low VSWR
What customers say
Customers highly value this surge protected coax switch for its exceptional reliability and robust protection. The heavy-duty construction provides significant peace of mind, especially for protecting expensive radio gear. Users consistently report excellent performance, noting low SWR and minimal insertion loss across frequencies, confirming its high quality for demanding setups. While the initial cost is premium, reviewers agree the investment is justified by the superior, long-term equipment safety and unwavering durability. This switch delivers uncompromising quality for serious enthusiasts prioritizing equipment security above all else.
Know before you buy
Yes. While the switch provides internal surge protection, it must be connected to a high-quality earth ground to effectively divert lightning energy away from your equipment.
The DELTA-4B-N is designed to ground all unused ports during operation, which helps reduce interference and provides an extra layer of protection for your equipment.
Yes, it features an integrated Model D-4 gas tube surge protector that can be replaced if it becomes damaged by a significant surge event.
Yes, the switch is rated for operation through 1.3 GHz, making it suitable for a wide range of VHF and UHF radio applications while maintaining low VSWR.
The center position acts as a safety feature that grounds all connected antenna circuits, which is recommended during lightning storms or when the station is not in use.
Yes, it is specifically engineered for 50 Ohm systems and provides excellent isolation between ports to ensure signal integrity.
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Ready to buy?
$150