The Dynacord “Eminent” is a nice old German made valve amp that I was asked to restore. It was originally designed as a small mono PA. It has two instrument and two mic inputs, simple bass and treble tone controls, and 4, 8 and 16 ohm output taps. The owner wanted to repurpose this lovely amp for recording guitar. This is an account of the work involved.Read more
This is a very simple project that takes only a few hours to make. It is a pair of 8 ohm resistive loads which can be used to test a mono or stereo power amplifier.
If you are working on an audio amp, you often need to see how it will behave when it is delivering power to a load. Using real loudspeakers is not practical, especially if you want to test at high levels and with sine waves. The noise would be unbearable, also you might damage a speaker. So you need a load to use instead of a loudspeaker.Read more