If you are under a certain age, you might not know the initialism VTVM. It stands for vacuum tube voltmeter. At first glance, you might just think that was shorthand for “old voltmeter” but, in fact, ...

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 ...

Towards the end of 2009, my roommate and I purchased a stereo audio amplifier that was originally built in the 1970’s. Several months after the purchase, however, the amplifier stopped working. Using ...