Faults
PCB – Printed Circuit Board heat damage
In electronics heat is often The enemy. In valve amplifiers there is a tension between this basic rule and the valves themselves which get mighty hot and also the established design methods for amplifiers. The problem is that heat damage caused by power resistors and valves eventually changes the circuit board material from a good … Read more
Mesa Boogie Dual Rectifier Problems
If you are having trouble with any of the following boogie symptoms then I may be able to help you out as I have spent more than my fair share of time on these metallic monsters. Mesa Boogie amps are reveered by players for their unique sound. But for us Amp techs they can be … Read more
Marshall DSL401
These medium sized combos from Marshall should be very cool. They are packed with features (like multiple voicings, low noise pre-amp, fab speaker) all in a small box. Unfortunately they are not so cool because they run so hot and they suffer from it. Look at the picture left. What you are looking at is … Read more
Pedal power supply failure
When you mix up plus and minus