DIY Antennas, QRP, SDR & Ham Radio Projects from VU3DXR
Explore LM386 audio amplifier projects on VU3DXR. Discover DIY circuit diagrams, pinout guides, and low-voltage amplifier builds for ham radio receivers. Learn how to optimize gain, reduce noise, and integrate this versatile IC into your homebrew electronics and portable radio communication gear.
This simple sine wave oscillator uses a transistor-based phase-shift network to generate a clean periodic signal, then amplifies it with an LM386 for usable output. It runs on a 9V supply and suits audio testing, tone generation, and learning oscillator fundamentals
The uBITX V6.1 is a popular amateur radio transceiver kit. It’s designed for ham radio operators who enjoy building their own equipment. Moreover, it offers great value for money and covers multiple frequency bands. However, like many DIY kits, it sometimes needs tweaking to perform at its best. uBITX V6.1 – My Audio Problem Story […]
LM386 Audio oscillator This one is excellent application of widely used audio amplifier IC LM386.Its output is square wave at no load condition. Its frequency is governed by supply voltage. It can be used as code practice oscillator, even as side tone for your qrp radio. The LM386 is an widely abused integrated circuit containing […]