Specifications:
Length: 97.384mmWidth: 20mmPCB Layers: 4 layers (Includes independent power supply and ground layer)Frequency Range: 500kHz to 4.5MHz (Integrated four-stage filter)Attenuator: PE4312 adjustable via Malachite ATT optionColor: Random color

Features:
1. Enhanced Signal Sensitivity: Optimizes signal matching for better reception, improving short-wave and medium-wave performance.2. Adjustable Attenuator: Integrated PE4312 attenuator expands receiving dynamic range.3. Image Interference Reduction: Four-stage filter minimizes frequency distortions between 500kHz and 4.5MHz.4. Dual Antenna Support: Compatible with 50-ohm systems and Hi-Z high impedance input systems for versatile antenna options.5. Plug-and-Play Integration: Seamlessly supports SDR-MAX and SDR-PRO without external technical support required.

What is an expansion board?
In the menu HARD-SW antenna, switch the external antenna typechoose 50 ohm system and high impedance Hi-z antenna input system.Optimum matching of the signals can significantly improve the receiving sensitivity.For the low frequency receiving image problem, this expansion board adds a four-stage filter between 500KHz-4.5MMHz, which can improve the image problem well.In addition. the expansion board adds a PE4312 attenuator, which can be adjusted through the malachite ATT option value, which greatly improves the receiving dynamic range of the malachite receiver.

Why choose the expansion board?
The expansion board can improve the sensitivity of the rod antenna,add attenuators, and reduce image interference.After installation, when the short-wave medium-wave mode is turned on,there will be a click of the relay action, and the signal will be significantly enhanced.You can choose according to your personal needs.
Note:This expansion board only supports sdr-max and sdr-pro in our store.


Package Included:
1 x Expansion Board