Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Half a century ago, vacuum tubes were very common in audio ...

There’s a mystique among both audiophiles and musicians about vacuum technology, thus having a tube amp still carries a bit of a cachet. New ones can be bought for eye-watering prices and old ones can ...

You can use three discrete transistors to build an operational amplifier with an open-loop gain greater than 1 million (Figure 1). You bias the output at approximately one-half the supply voltage ...

The Cayin A-50T vacuum tube amplifier, at least for you guys out there, sounds so good it's like Viagra for your ears! Ex-movie theater projectionist Steve Guttenberg has also worked as a high-end ...

I got to thinking about this after seeing the Aopen tube MB. After that I started looking at building tube amp threads there was 1 or 2. What I gathered was that tube amps put out good sound. I still ...

What Is a Tube Amplifier? Tube amps are made using vacuum tubes, which were invented in 1925. Using a glass bulb akin to a light bulb, tube amps take a weak signal and amplify it several times through ...