Name: Koden, GA-08 Marine Active GPS Antenna - marinocart
SKU: 835145
Price: 189.00 USD
Availability: InStock

The Koden GA-08 is a marine-grade active GPS receiving antenna manufactured by Koden Electronics Co., Ltd. in Japan. Designed as the primary satellite signal reception unit for Koden GPS navigators (including the KGP-913, KGP-913Mk2, and KGP-913Mk2D series), the GA-08 receives L1-band GPS signals (1575.42 MHz) to provide reliable positioning data for vessel navigation displays.

Housed in a high-impact, UV-stabilized weatherproof dome, the antenna features an integrated low-noise amplifier (LNA) that compensates for coaxial cable loss and ensures stable signal reception during heavy weather or high sea conditions. It is built for long-term deck and masthead exposure, featuring an IPX6/IPX7 waterproof rating and standard marine pole-mounting threads.

Key Features:
• Active Low-Noise Amplifier (LNA): Filters out RF interference and amplifies weak GPS satellite signals for precise position fixes.
• Weatherproof Dome Housing: Durable, UV-resistant white polymer casing engineered to withstand salt spray, rain, and continuous sun exposure.
• Direct Koden Display Integration: Connects directly to Koden KGP series GPS navigator main units via coaxial cable terminated with a BNC connector.
• Standard Marine Threading: Standard 1-inch 14-thread mount fitting enables easy installation on cabin roofs, radar arches, or antenna poles.

Technical Specification

GPS Reception Characteristics:

Receiving Frequency: 1575.42 MHz (L1 band, standard GPS frequency)
Receiving Channels: 18 channels parallel (allows for quick acquisition and tracking of multiple satellites simultaneously).
Receiving Code: C/A code
Sensitivity: Better than -130 dBm (at an elevation angle of 5° or over), indicating high sensitivity for weak signal acquisition.

Physical & Environmental:

Antenna Type: Passive GPS antenna (meaning it draws power from the connected GPS receiver/navigator).
Cable Length (Standard GA-08): 10 meters (approximately 33 feet)
- Variations exist:
  - GA-08L: 15 meters (approx. 49 feet) cable.
  - GA-08S: 0.5 meters (approx. 1.6 feet) cable (designed for use with an extension cable).
Connector Type: BNC connector (on the GA-08 and GA-08L), N-P connector (on the GA-08S).
Weight (without cable): 0.19 kg (0.42 lb)
Weight (GA-08 including 10m cable): 0.62 kg (1.4 lb)
Dimensions: While precise dimensions are not always listed independently, based on typical diagrams for Koden antennas, it’s a compact, dome-shaped antenna. Approximate diameter of the base is around 90-100mm.
Mounting: Typically designed for pole mount or surface mount.
Waterproofing: IPX6 (Protected against powerful jets of water), making it highly suitable for exposed marine environments.
Operating Temperature: -25°C to +55°C (-13°F to +131°F).