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Middle Eastern wars just sounded ... better in the 80s.

da7d922377ae419daf8fbcdf319722ac_d3cdd07b32.mp4 Pioneer stack and 🍑

One board, channel, completed. ZF setup was successfully. SS setup didn’t fall out well. It turned out that I’ve connected the feedback wrong with terrible current draw an 8.4V offset at output. After correction, easily done, offset came down to fluctuating 30-40 mV and BIAS acted all right, but not good enough to be used as an amplifier. Now, I feel I’m done with this project and end it with, IMO, a satisfactory Zero Feedback dynamic amplifier. Perhaps I’ll try to get the SS mode working in some future. Main problem is my eyes and enough steady hands to solder SMD and… lack of competence. I just copy others designs. Thank you Kevin. I have some PCB to much for own use. If interested to try this – ping me. Boards are right and left channels, one version is ZF two layers and the other FF/SS version (SS probably nor working) is four layers. Both versions have issues so they will be for free. A nice contribution to Doctors Without Borders will be appreciated.

A reminder that I need to listen to that album again. Early 1980's vibes are always appreciated.

After another week of testing I like the outcome of the latest CFA3smd something with the dual opamp bias servos. Thanks a lot Kevin. My version is a Zero Feedback version of CFA3. I’ve heard, read, that some people favor the Super Symmetrical version. So, here is a drawing drafting of a ZF/SS version of CFA3smd something with… … six small Omron latching relays. Five for ZF/SS switching and the sixth for LED identification of mode in progress. Two JST XH3 connectors for a momentary toggle switch and LEDs to control the ZF/SS modes.

RIP Sid Krofft thank you for my acid trip childhood shows.