Microphone compressor using LM1458

Microphone compressor using LM1458: The LM1458 is a dual op-amp used in audio amplification circuits. Here how you can create a simple microphone compressor using the LM1458.

Building an FT8 Digital Interface – Dive into Digital Modes

Building an FT8 Digital Interface – Dive into Digital Modes: This blog post examines a well-designed FT8 digital interface circuit that provides both audio coupling and PTT (Push-to-Talk) control.