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
After successfully building my LM3886-based gainclone project amplifier, I’ve decided to build a version that is better suited to driving low impedance loads.
This lead me to the LM4780 chip from TI, which is just two LM3886 dies in the one package. It can be used as a stereo amp, or a bridged or paralleled mono amplifier.… Read more
This video documents my comprehensive overhaul and restoration of a gorgeous Krell KSA-150 class-A power amplifier.
This wonderful KSA-150 developed a serious fault at some point in the past. This had been quickly fixed and was sold to me in very poorly repaired condition. Because of this, I decided to completely overhaul the amplifier and restore it back to factory condition, using original spec or better parts.… 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