Search found 45 matches

by KMN
Fri Oct 25, 2019 3:37 pm
Forum: Build
Topic: Flat Balanced Input Moving Coil Phono Preamp Construction Information
Replies: 39
Views: 2069

Re: Flat Balanced Input Moving Coil Phono Preamp Construction Information

Sorry if I missed it. Is there a BOM or a cart or a set up for this?
by KMN
Fri Oct 25, 2019 3:31 pm
Forum: The Peabody Lounge
Topic: Engineering malpractice
Replies: 4
Views: 564

Re: Engineering malpractice

https://www.harborfreight.com/hand-tool ... 63644.html

Maybe one of these? I love mine. I use it for trailer hitches, bridge girders, etc.
by KMN
Wed Jul 24, 2019 3:02 pm
Forum: Pro Audio Design
Topic: ~QUESTIONS ABOUT "LOCAL"-NEGATIVE-FEEDBACK OUTPUT SECTIONS THAT ARE BASED ON A TERTIARY-WINDING OUTPUT TRANSFORMER~
Replies: 8
Views: 1509

Re: ~QUESTIONS ABOUT "LOCAL"-NEGATIVE-FEEDBACK OUTPUT SECTIONS THAT ARE BASED ON A TERTIARY-WINDING OUTPUT TRANSFORMER~

I found this. I beg your pardon, Wayne, if linking it turns out to be some copyright violation. Some of the schematics use an extra transformer winding for feedback.http://lcweb2.loc.gov/master/mbrs/recor ... Misc.).pdf
by KMN
Tue Jul 23, 2019 11:58 pm
Forum: Pro Audio Design
Topic: ~QUESTIONS ABOUT "LOCAL"-NEGATIVE-FEEDBACK OUTPUT SECTIONS THAT ARE BASED ON A TERTIARY-WINDING OUTPUT TRANSFORMER~
Replies: 8
Views: 1509

Re: ~QUESTIONS ABOUT "LOCAL"-NEGATIVE-FEEDBACK OUTPUT SECTIONS THAT ARE BASED ON A TERTIARY-WINDING OUTPUT TRANSFORMER~

Did you measure the signal coming off the tertiary when you energized the primary? The 9 ohms could mean there is a step up there too but might also just mean smaller wire diameter. Curious if the term you've used "tertiary winding" is that yours or is it in the spec sheet? The reason I ask is that ...
by KMN
Mon Jun 17, 2019 9:35 pm
Forum: Test, Measurement and Repair
Topic: Digilent Analog Discovery 2
Replies: 4
Views: 2563

Re: Digilent Analog Discovery 2

Have you guys seen these Pico scopes? All these choices. We are living in the future! https://www.picotech.com/products/oscilloscope
by KMN
Tue Jun 04, 2019 11:20 pm
Forum: Document
Topic: Bootstrapped Op Amp Articles
Replies: 33
Views: 37363

Re: Bootstrapped Op Amp Articles

I think I may have an excuse for trying a bootstrapped opamp circuit. In my case to minimize distortion. I was looking for an audio grade op amp for doing filters at +/-36V rails, where the non inverting configured inputs may see up to full rail voltage. Power output is very low but precision at lar...
by KMN
Mon May 27, 2019 5:52 pm
Forum: The Peabody Lounge
Topic: Pro Audio Design Forum taught me all I know, can I build anything without getting sued?
Replies: 8
Views: 1781

Re: Pro Audio Design Forum taught me all I know, can I build anything without getting sued?

By the way. That voice forwarding technology "scandal"/ tale, I don't mean to make light of it, but that is some really great reading. Kind of x-files like. I am sure it must have been a quite a hassle indeed! I don't think I would not have enjoyed it at all. Whenever you are ready to stage the ham/...
by KMN
Mon May 27, 2019 4:23 pm
Forum: The Peabody Lounge
Topic: Pro Audio Design Forum taught me all I know, can I build anything without getting sued?
Replies: 8
Views: 1781

Re: Pro Audio Design Forum taught me all I know, can I build anything without getting sued?

Maybe something like having~ 3-5 boards fab'd, build up one or two, let er rip and see how it sounds? I mostly just want one. I was thinking I maybe I could make the one bitchen vinyl ripping rig to eclipse all others. Wayne you've been very gracious with your wealth of knowledge and hosting the web...
by KMN
Sun May 26, 2019 4:41 pm
Forum: The Peabody Lounge
Topic: Pro Audio Design Forum taught me all I know, can I build anything without getting sued?
Replies: 8
Views: 1781

Pro Audio Design Forum taught me all I know, can I build anything without getting sued?

Kind of like divine archive of knowledge this website is completely caked with amazingly instructive circuit descriptions and discussions of all manner of wonderful audio circuit topology, and these really unique schematics in the always recognizable hand drawn but easily readable style of this site...