There’s apparently people even stupider than gullible audiophiles out there. I am astonished.read more
As I fired up the prototype, a red glow suffused the room, a gaudy, cheerfully sleazy illumination. Well, not surprising, considering the near-hundred red LEDs adorning the chassis.read more
This is a circuit I came up with some years ago, based on the cross-coupled inverter; although at first glance, many people thing "cascode," it isn't. Note that the FETs are p-channel and configured as source followers. Each FET drives the cathode of one side and the...read more
My phono preamp for MC cartridges, His Master’s Noise, was published as a feature article on diyAudio.com.read more
Download courtesy of AudioXpress.read more
This is the story of a project that mutated.read more
A common engineering challenge in home audio is the addition of an active subwoofer system to speakers that have limited bass extension.read more
UPDATE February 2011: A better way to do this has been added at the end. A PLEASANT SURPRISE An email came. I could get a set of one of my all-time favorite commercial speakers at “a ridiculously low price.” Would I be interested? I did not hesitate. Rewind. If you...read more
Disclaimer & Warning
Tube circuits run on high voltages. High voltages are used to execute prisoners. Get it? If you don’t know exactly what you’re doing at some point, DON’T DO IT! Always try to have someone keeping an eye on you in case of an accident. Read the High Voltage Safety thread at diyAudio.com. If you off yourself, at least have the decency to leave a note to your widow and kids saying that I warned you!
As a consequence of their specialized nature, components used in tube circuits are either expensive, rare, or (unfortunately too often) both. So you want to minimize the number of components reduced to a charred mass. When the inevitable happens, don’t come looking for me to pay for it.