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Global or Local feedback? Populate within red square accordingly. Minor change to existing board.

Dang, I just double checked both links and they seem to be up now. Let me know if they are still throwing errors for you. Not sure what was going on. -- cheers

Something is wonky on the site. Keep getting 404 errors

The Hu: exists

Couple things.....my LinkedIn transformation is as complete as I think I'll get. Added a pronoun (Red Lectroid) and updated my profile pic. Next up: met three school friends, all Jewish women, one of whom I hadn't seen in 40 years! An awesome time catching up, and spending time with them all. The woman I hadn't seen in 40 years gave me 3 things from her scrapbook: my Bar-Mitzvah invitation, the Party Invitation, and my Thank You note to her. All about 48+ years old! It was incredible! She and her husband live in Southern Maine, not far from my condo up there. So we'll definitely get together! I am fucking LOVING retirement!

^^ That's awesome! Made me think of this song, mixing a tiny bit of Tuvan throat singing with Gaelic Mouth Music (and American? beats). I listened to this album last week, she is amazing!

Happy Birthday!

Done

The style mix I never knew I needed

Happy Birthday!

Happy Birthday!

Happy Birthday!

New headphone protector. Four layers board. Two LM4040 2.5V references. Limits set to ~ +/-20 mA.

bœuf

Thanks. I moved feedback from output to after R10 – red arrow. Not sure if that was what you meant. Anyhow, now SS mode works with the 20 pF capacitor. It was an easy mod – just some Kapton film and short wires. Sometimes you are lucky.

Happy unbirthday, Jeffy! (party favour noise) https://www.youtube.com/watch?v=_bTM8ndwxUk

Cheers Jeffy, Happy past birthdays...

Just a suggestion I haven't tried this but I would also try disconnecting the output buffer and take the feedback from what would have previously been the input to the buffer - then re-run all of these trials. very curious if the results are different

Happy belated birthday, Jeffy. I wish it was a great one.

Happy belated birthday, Jeffy!

Hope it was a good one Jeffy! Cheers!

Happy non-non-AI birthday wish

Some progress. After removing 20 pF capacitor in feedback line switching between ZF and SS bias and offset remain more or less unchanged. It seems that the bias servo doesn’t work well with capacitor in feedback line. My bias servo differs some from what Kevin has suggested in this thread. Only built one SS/ZF board so far. To be continued…

Belated Happy (non AI) Birthday Wishes, Jeffy!

Happy birthday, Jeffy!