notes to self

Tag: vacuum tube

  • The Cicada: a push-pull vacuum tube amplifier build

    Well, 2017 is more than half over now. This means I should probably post something to get at least one post in for this year. I’ve been meaning to do a write up about this project for a while, but time isn’t as freely available as I would like it to be. Go figure. I…

  • Differential Amplifier w/ Cathode Follower

    Differential Amplifier w/ Cathode Follower

    This is a circuit designed for a classroom project whereby the instructions were to “improve” a differential amplifier circuit. The differential amplifier design is essentially an exercise in understanding the inner workings of an opamp, and it effectively works in the same way. The figure below is a schematic for the differential amplifier without the…