Tube Amp Archive

........ Um... maybe? How should the transformer primary be switched and fused differently from what's in the schematic? Death cap should be eliminated, as well as the ground switch. The ground wire from the AC line-in should be securely bolted to the chassis near the entry point .... and nothing e...

My attorney would most likely say given the lack of background information, there's too much liabilty involved and not to answer any of your questions. From an instructor's perspective I say if you have to seek advice from random strangers on an internet forum to determine what not to touch inside ...

My attorney would most likely say given the lack of background information, there's too much liabilty involved and not to answer any of your questions. From an instructor's perspective I say if you have to seek advice from random strangers on an internet forum to determine what not to touch inside ...

Also, you bring up a great point about safety. Are you legally liable? Because I would get you both some real safety training before even starting. Because death is an actual possibility... ...IMPORTANT! Learn about the power filtering capacitors (the big ones)! They can hold onto 500+ volts even a...

First off, thank you for your answers... re: #2 The power supply circuitry is at the bottom of the schematic. There are five nodes supplying different voltages to different circuits. Those node voltages are not listed on the schematic at those junctures, but that information should be obtained. To s...

First off, I apologize to anyone in advance for wasting your time if I am doing so. A short background... I'm a high-school teacher running a Tech Project class where students take on a difficult and time-consuming task and build something complicated. One of my students has taken on the task of bui...