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
This amp, unusual with its master volume control had become unreliable. Occasional red plating, bit of noise. The cause is heat damaged circuit board. Just look at the pictures below showing the damaged sections – the dark areas indicating heat damage. The problem is that heat damage eventually changes the circuit board material from a … Read more
Post 1990 Fender amps seem to have a variety of input jacks fitted. The great American amp manufacturer seemed to have tried lots of different styles of Jack but they all have in common flakey behaviour and robustness compared with old amps from 50s to the 80s. In older amps you commonly see open jacks … Read more
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
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
Just look at how neatly these amps are made. Neat little wires running north and south like an underground train map connected by thick copper bars. Icon Audio make a great range of valve based hifi.
Wow what a treat. This 1966 AC100 needs a service. Well after all these years yes I agree it’s about time. One owner from new, original cover and used twice weekly in the band. The sort of thing vintage amp enthusiasts dream about. This rarity is one from the erase when pop music was really … Read more