Audio design

[guclusat]

• Active CW Filter and Audio Amplifier​
• Dynamic Noise Filter​
• Microphone Preamplifier Electret​
• Microphone Speech Processor​
• Microphone Amplifier Low/High Impedance​
• Class-A Headphone Amplifier​
• Class-A Audio Amplifier​
• Speech Processor - TL081​
• Variable CW Bandpass Filter​
• Variable CW Filter and Amplifier​
• Audio Automatic Gain Control​
• Baxandall Audio Filter​
• Microphone Amplifier with ALC​
• Audio Amplifier with mute control​
• Noise Canceling Electret Microphones - WB9YBM​
• Dynamic Microphone Preamplifier​
• Speech Processor - All BJT​
• Audio Preamplifier with Dynamic Noise Reduction​
• Class-A HIFI Headphone Amplifier​
• Super Class-A Low Distortion 3W Amplifier​
• CW Audio Filter with Digital Selection - PY2MG​
• Microphone Preamplifier with Tone Control - PY2MG​
• Boosting Gain and Limiter of LM386 - VK3AWC​
• Variable Audio LPF with MAX293​
• 300 Hz - 3 kHz Microphone Filter​
• VOX Circuit​
• Voice Level Meter​
• Microphone Dynamic Compressor​
• 1kHz Sine Wave Oscillator​
• High-Pass Low-Pass Microphone Preamplifier - N2MNN​
• Passive Audio SSB-CW Filters - W3TS​
• LC CW Band Pass Filters - DC8NR​
• Audio Intelligibility Enhancer - N4GG​
• Dual-Tone Audio Generator - VE3FIT​
• RF Speech Clipper - DF4ZS​
• 1W Audio Amplifier with Compressor​
• Booster for Elektret Microphone​