Search found 41 matches

by KMN
Mon Jun 17, 2019 9:35 pm
Forum: Test, Measurement and Repair
Topic: Digilent Analog Discovery 2
Replies: 3
Views: 1066

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: 34077

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: 940

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: 940

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: 940

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...
by KMN
Fri Apr 26, 2019 9:40 am
Forum: Pro Audio Design
Topic: A Low Noise Balanced Input Moving Coil Preamp Using the ZTX851
Replies: 483
Views: 176102

Re: A Low Noise Balanced Input Moving Coil Preamp Using the ZTX851

Wow. That is impressive, especially after learning about the the details of the hum torture chamber you are running it in. That's a lot of gain and a lot of cable with all that stray field around. I think I might need one too.
by KMN
Thu Apr 25, 2019 10:27 am
Forum: Pro Audio Design
Topic: A Low Noise Balanced Input Moving Coil Preamp Using the ZTX851
Replies: 483
Views: 176102

Re: Out-of-band and Flux Loop Tests

I'll leave a 5 mm space on the PCB for a 1 nF film C for problematic RFI situations but its not required for stability. This post is a bit late to the party. Did you ever try with moving magnet inductances? Maybe some of your customers, couldn't imagine who they might be, would want to try running ...
by KMN
Tue Apr 16, 2019 5:17 pm
Forum: Pro Audio Design
Topic: Op amp matching
Replies: 44
Views: 6173

Re: Op amp matching

Indeed. Though, while appreciation of the NE5532 seems fairly ubiquitous, the NJM2068 seems to fly under the radar for many. I have recently been gaining quite a healthy respect for it in some low noise circuits. When it is the winner it often beats out parts I didn't think could be beat. I am still...
by KMN
Mon Apr 15, 2019 10:17 pm
Forum: Pro Audio Design
Topic: A Low Noise Balanced Input Moving Coil Preamp Using the ZTX851
Replies: 483
Views: 176102

Re: A Low Noise Balanced Input Moving Coil Preamp Using the ZTX851

Of course, my eyes are terrible but it is hard for me to see exactly how you dealt with the transistor thermal coupling problem. Are they face to face..bonded somehow? Do you have any close up shots of that? I was thinking maybe if you planned to insert the TO92's 90 degree bent, the flat faces coul...