[sdiy] Teardowns of the Buchla 261e and 291e

[Lanterman, Aaron D]

I impulse purchased these on Reverb. It took them apart to take a peek at the PCBs and some guesses as to what some of the parts are doing. (In particular, the expensive op amp used in the 291e is very curious. It’s like a $7 chip; I’m not sure why Don Buchla would have needed something so fancy vs. the LF353s used throughout the rest of the unit).

291e: https://youtu.be/-ndWT1LWqJ8

261e: https://youtu.be/YUaM0oqZC5A

Aaron Lanterman, Prof. of ECE, Georgia Tech
My blog on Education and Innovation: https://edupocalypsenow.wordpress.com
My blog on Electronics and Programming: https://lantertronics.blogspot.com
My YouTube channel on Electronics and Programming: https://www.youtube.com/c/lantertronics



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