I recently built a dual-mono LM3886 chip-amp / gainclone amplifier from a kit sold by Brian Bell, at chipamp.com. In this article, I discuss the history of the gainclone and how I built my first chip-amp!
The LM3886 is one of National Semiconductor’s single-chip monolithic amplifier integrated circuits. It’s almost an entire amplifier-on-a-chip, with only a few extra parts required to build a fully functional, high-performance amplifier.… Read more
I recently modified a Musical Fidelity X-CAN V3 headphone amplifier. My goal was to see what sort of improvements I could make without spending too much cash.
The X-CAN V3 uses bipolar output devices, with a tube driver stage. The tube driver stage is a JAN (Joint Army/Navy) 6922 mil-spec dual-triode tube, per channel. These tubes run in class-A and give the voltage gain necessary to drive a pair of BD139/BD140 bipolar transistors.… Read more
I’ve just finished building a Ten-Tec 1253 Regenerative Shortwave Receiver kit and wanted to share some of the build process with you.
The Ten-Tec 1253 is a gorgeous little regenerative shortwave receiver, that is sensitive and fun to build and use. Building the Ten-Tec 1253 was fairly straightforward, there are a couple of little things to watch out for, but it was otherwise a relatively easy build for an experienced constructor.… Read more
I recently designed and build a set of speaker stands, for my own pair of Yamaha NS-1000M studio monitors. I recommend this project to anyone looking to put their own Yamaha NS-1000M speakers on stands and will describe the basic construction here.
First, get the wood. I used square-section pine for the legs and had 8 x 300mm lengths cut at my local hardware store.… Read more