Isolated DMX splitter
Introduction When you need to connect DMX projectors you can use wireless or cable. In my case, I have a fixed setup so I use a wire solution. But the problem with DMX is the low immunity regarding disturbances. When a connexion is lost in the chain all the projectors after the losy connection are
Marantz PM350 : How to repair a vintage amp
Introduction A guy bring to me a MARANTZ PM350 amplifier. He says that to have a little sound the volume button has to be set to the maximum. And, it only works on left channel. The PM350 is a vintage (1980) audio amplifier designed by MARANTZ. I used it several years and the sound is
Reparation d’un Marantz PM350
Need English version? It’s here Introduction L’autre jour quelqu’un m’a apporté un amplificateur Marantz PM350. Le son était tout faible même avec le volume tourné à fond. En plus, seulement la voie de gauche fonctionne. Alors il faut savoir que le PM350 est un ampli qui date des années 80 de type AB. J’en avait
Mic to line amplifier
Introduction So I needed to connect a standard microphone to a conventional speaker amplifier. The signal comming out the mic is really low. It can be lower than 20mV. You need to amplify the signal to the line level. That’s why with the component I have in stock I do this simple microphone pre-amplifier. The