Description
Digital Antenna 578-SB 4' AIS Antenna | Boat Supply Store
Ensure critical vessel-to-vessel and vessel-to-shore communication with the 4-foot Digital Antenna 578-SB, engineered for the 159-162 MHz AIS frequency range. This antenna delivers a robust 4.5dB gain and maintains a superior 1.5:1.0 SWR ratio across its operating band, guaranteeing optimal signal transmission and reception for AIS transponders. Constructed with durable brass radiators and a 316 stainless steel ferrule, it's built to withstand harsh marine environments, providing essential visibility for commercial and recreational vessels navigating busy waterways or fishing offshore.
Key Features
- 4' Length for optimal AIS reception and transmission.
- 4.5dB Gain provides superior signal strength compared to standard VHF antennas.
- Low 1.5:1.0 SWR ratio ensures efficient power transfer from your AIS unit.
- Gold factory-attached mini-UHF female connector with included PL-259 adapter for versatile installation.
- 25' of low-loss RG-8X marine cable minimizes signal degradation.
- Durable brass radiators and soldered connections ensure long-term reliability.
- High gloss urethane finish and 316 stainless steel ferrule resist corrosion and UV damage.
- Easy installation with a standard 114 threaded base mount.
Specifications
| Product Specifications | |
|---|---|
| Length | 4' |
| Gain | 4.5dB |
| Frequency Range | 159-162 MHz |
| SWR Ratio | 1.5:1.0 |
| Mounting Type | Standard 114 threaded base |
| Connector Type | Gold factory-attached mini-UHF female with PL-259 adapter |
| Cable Length | 25 feet |
| Cable Type | RG-8X marine cable |
| Radiator Material | Brass |
| Ferrule Material | 316 stainless steel |
| Finish | High gloss urethane |
Who This Is For
Commercial vessel operators and recreational boaters requiring a reliable and high-performance AIS antenna to meet USCG requirements and ensure vessel visibility on AIS networks. This antenna is ideal for those seeking precise signal performance and robust construction for critical communication.
How It Compares
| Feature | Digital Antenna 578-SB 4' AIS Antenna | Shakespeare 5205 |
|---|---|---|
| Length | 4' | 4', 4' |
| Gain | 4.5dB | 3dB, 3dB |
| Connector | Gold factory-attached mini-UHF female with mini-UHF male to UHF male (PL259) adapter | PL-259, SO-239 |
| SWR Ratio | 1.5:1.0 from 159-162 MHz | Less than 2:1, Less than 1.5:1 |
| Cable Included | 25' RG-8X marine cable | Varies by kit, often sold separately, Sold separately |
Common Concerns Answered
Can I return the Digital Antenna 578-SB if I have an issue?
Returns are handled directly with the manufacturer for warranty or defect claims, as returns to the original point of purchase are not permitted. This ensures a direct and efficient resolution process with the product specialists.
Is the included cable long enough for my installation?
The Digital Antenna 578-SB comes with 25 feet of RG-8X marine cable, which is suitable for many installations. For longer runs, an extension cable or a different antenna model with a longer standard cable might be considered.
What if I prefer a different connector type?
This antenna features a gold factory-attached mini-UHF female connector, which is widely compatible. A PL-259 (UHF) adapter is included, offering flexibility for connecting to most standard AIS transponders. If a different connector is absolutely required, adapter cables are commercially available.
Frequently Asked Questions
What is the SWR ratio of the Digital Antenna 578-SB?
The Digital Antenna 578-SB boasts a low SWR ratio of 1.5:1.0 specifically across the 159-162 MHz AIS frequency range, ensuring efficient power transfer.
What type of connector does the Digital Antenna 578-SB use?
It utilizes a gold factory-attached mini-UHF female connector and includes a PL-259 (UHF) adapter for broad compatibility with AIS transponder inputs.
What is the gain of the Digital Antenna 578-SB?
The Digital Antenna 578-SB provides a significant 4.5dB gain, which is higher than many standard VHF antennas, enhancing AIS signal reception and transmission.
Is the Digital Antenna 578-SB compatible with all AIS transponders?
Yes, with its standard 114 threaded base and the included PL-259 adapter, it is compatible with the vast majority of AIS transponders on the market that utilize UHF or mini-UHF connectors.
What type of cable is included with the Digital Antenna 578-SB?
The antenna includes 25 feet of low-loss, tinned braid, foil-shielded, UV-stable RG-8X marine cable, designed to minimize signal attenuation over its length.
