The Selfsat LDU4 is a Quad LNB designed for the Selfsat H21D and H21D2 flat satellite antennas. It provides a practical solution when the antenna’s existing LNB needs to be replaced or when the installation needs to be upgraded for multiple receivers.
The LNB has four separate outputs, allowing up to four satellite receivers or tuners to be connected directly to the antenna. Each output operates independently, enabling the connected users to select different satellite channels simultaneously.
The LDU4 can also be used with receivers equipped with twin tuners. Each tuner must then be connected to a separate LNB output using its own coaxial cable.
Its construction is specifically designed for the Selfsat H21 series and provides a compact, integrated installation without a conventional external LNB with a 40 mm mounting neck.
✅ Product Benefits
- Designed for the Selfsat H21 antenna series
- Suitable for Selfsat H21D and H21D2
- Four separate and independently controlled outputs
- Connects up to four receivers or tuners
- Suitable for receivers equipped with twin tuners
- Suitable as a replacement or upgrade LNB
- Gain of up to 60 dB
- Low specified noise figure
- Designed for digital satellite reception
- Compact, model-specific construction
- Enables independent channel selection for multiple users
- Straightforward connection to a compatible Selfsat antenna
🎯 Ideal For
- Selfsat H21D
- Selfsat H21D2
- Installations with up to four satellite receivers
- Multiple televisions with integrated satellite tuners
- Receivers equipped with twin tuners
- Upgrading from a Selfsat Single or Twin LNB
- Replacing a damaged or defective LNB
- Homes and holiday properties
- Motorhomes, caravans and camping
- Balcony- and wall-mounted Selfsat antennas
- Discreet multi-user satellite installations
🔧 Use and Connection
The LDU4 is installed on a compatible Selfsat H21 antenna. Its four outputs are connected using separate coaxial cables to up to four satellite receivers or tuners.
Each receiver or tuner requires its own direct cable from the LNB to select satellite channels, frequency bands and polarisation independently of the other connections.
A receiver equipped with two tuners will normally use two LNB outputs when both tuners need to operate simultaneously, for example when recording one channel while watching another.
This is a model-specific Selfsat LNB and not a conventional Universal LNB with a standard 40 mm mounting neck.
⚙️ Technical Specifications
Product type: Quad LNB for flat satellite antenna
Model: Selfsat LDU4
Compatibility: Selfsat H21D and H21D2
Number of outputs: 4 separate outputs
Directly connected receivers/tuners: Up to 4
Input frequency: 10.70–12.75 GHz
Specified IF output frequency: 950–1950 MHz
Specified local oscillator frequency: 9.75 GHz
Gain: Up to 60 dB
Noise figure: Approximately 0.2 dB
Signal type: Digital satellite television
Mounting system: Model-specific for the Selfsat H21 series
Product number: 11588
EAN: 3700433800174
📦 Package Contents
- 1 × Selfsat LDU4 Quad LNB for H21D and H21D2
