Resistors in Your Amp This is a longer than usual article talking about the different type of resistors in your amp. Resistor technology has changed over the decades . What is common is that many types change their values over time.  They usually go high in value and with certain types heat makes the problem worse. Some  create noise.  The overall result is that the values can change so much that the amp stops dead […]
What makes a valve fail in your amp Let’s have a light look at valves. Ever wondered why if you buy a nice new valve ( tube) amp that the amp has 2 years warranty and if you check the small print on the warranty carefully, you will see the valve warranty is a lot shorter – perhaps only 90 days! Valves are very old electronics technology. They were invented in 1910 and have been
Vox Amp Schematics Valve and Solid State -Updated 13th Nov 2023 This post used to link to Korg who had kindly gathered together the schmatics of a whole pile of Vox Amp schematics from about 1960 onwards. I posted this in 2019. Korg has now removed this page from their site.  A good alternative reference is on the Vox Showrrom page  Click here for the link Moat of  the Vox AC XX models are there
Never Believe an amp is Beyond Repair A number of years ago, I was once GIVEN a 1960’s top boost Vox AC30. A pint of beer had been sitting on the amp at a gig ( a No-no!). the guitarist knocked it over when he turned to adjust the amp settings. Whoosh! the beer was knocked over and poured into the amp air vents. There was  bang and the amp died. he took it to