Building the Largest 741 OpAmp in the World with Vacuum Tubes (Plus 555 Timer Update)

Published at : 23 Dec 2025

The 555 timer is one of the most popular chips in the World, but hot on its heels is the 741 Operational Amplifier. In this episode we take a look at the state of the 555 timer kit and, since we’re waiting on parts, take a stab at building a 741 Operational Amplifier!

Check out this episode about our first foray into OpAmp building:
https://youtu.be/UvN7tck61DI

And check out this episode for more information on the HP Oscillator:
https://youtu.be/EAkiPeC1Xqw

Artist: C7, Jamphibious
Title: Mega Man 3 "Shadow's Lounge"
https://ocremix.org/remix/OCR02710

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