YashN

Rest In Peace, my friend.

Hi Alex, Great progress on really interesting things here. Noted. Will be cool for future personal experiments too: I have been considering getting a small DC-powered motherboard to be able to do a full Linear Reg PSU for the PC side one day. These avenues and results can come in handy for sure. Doing some great progress on instrument signal paths as well these days. Will keep at it but I also want to get back to the Power Supply Research as well as some new Research I am doing on Clocks. Early days still for the latter, but I think I have a good grasp so far and some cool ideas to build on. All the best to you and Oz.

What's up, barrows? I have a fair number of them from visiting thrift shops. In other words, I look for cheap as chips gear with a chassis and re-use those. The metal you see in my avatar here comes from one of those. I get them for around CAD5 - 10, so less than $10... Sometimes, if I'm lucky, I also get quite a good transformer for Linear PSU builds as a bonus (with other re-usable internal parts). I sometimes also get gear for free: given away or thrown away. Cost to me is zero. Some of the chassis require a paint job, some require drilling, additional metal work, but beats having to buy and ship a new chassis for me so far.

True, true. What's up Alex? There is a lot of cool new work I have been doing on regulation during these periods of lockdown here. Results have been nothing short of astonishing, bringing even more detail and dynamics following the work on the original Linear Regulated PSU with the DAC and the custom USB connector and more. I still have more work to do on that as I'd like to do some comparisons between topologies but it's all super promising. Some other thoughts occupying my mind these days: We have similar issues to solve - PSUs, interconnects, noise/interference, signal path optimisations - at the very source of much of our music. By source here, I mean the actual electronic instruments and the means of production at all stages. I have been doing some very fruitful work on these as well. Anyway, good catching up. What's new around here?

Oh really, huh? Face-saving now instead of focusing on the truth. What would Henry Ott say? What would Armstrong say? What would Brown say? What would Morrison say? What would Whitlock say? What would Giddings say? What would Muncy say? I suppose it's easier to write lists of authors rather than actually understand elementary Physics, huh? It's a good thing the Laws of Physics don't depend on you nor Marce for whom your misplaced sycophantic glee seems never-ending, and who, when given a venue to show all his knowledge here, exited fast tail between legs rather than "contribute" like a few other usual suspects.

I have a hard time here finding the best version of 'Security'. I have a couple of CDs and the sound seems lacking, rolled-off.

Thanks man, What's up? Many new audio experiments? Been enjoying the fruits of my labour. Can you believe much gear on the production side of music is badly designed as well? Crazy, huh?

Really, eh? Well, bet the farm then. "To be totally correct"... You lose. Guess who corrected Speedskater on this very same subject years ago here.

I thought that 'floating SMPS' was actually using John's output-grounding trick on an existing SMPS. Doesn't seem like it is judging by your response? Would it be one where this grounding is already implemented? No idea, I don't care much about SMPSes anymore I may still give the output-grounding a try and listen in my setup, especially at the DAC power side: this is where I have several configurations I can test and listen to. However, it might be a while until I get time and will to do this.

That would be the output-grounding trick by John? Worth a try for sure. Does it totally interrupt leakage currents? AC-side pollution, etc...?

iPhones have been manufactured in Asia too, so there shouldn't be any definite conclusion as to the country of origin, it's more about the nature of the PSU itself. I'll take a Simple Linear over an SMPS any day for audio, a Swenson Linear over any other Linears. Still haven't experimented with Salas-type PSUs though, that would be next on my list of things to do (too many to mention). Hope Sydney's is great as Summer's here.

It's way, way more than that... Build one. Listen (especially if you can compare to a DAC which by default is USB-bus powered in a direct connection to a computer). I did. I did use a 317 myself as this is what I had on hand, but his original reg is much better (and there are probably much better ones nowadays). In my build I did several iterations post-reg until I was happy with the results - problem here is the 317 is not very good so you end up battling non-linearities because of capacitors and their interactions with that Reg.

Got a lot of cheap second-hand CDs this Spring. Last spring was a new one for me while hunting for cheap CDs: as the day was closing, the owner of a shop just told us to take anything we wanted from the discounted area (books and CDs) for free(!). So, last year I got a whole set of Rock & Roll CDs, like Silverchair, etc... that I probably wouldn't have thought of buying for myself in the first place. Really glad to get a new Dead Can Dance compilation album this time: I think I have amassed around 7 albums from them, so I probably have all of these songs except for the two new ones on this compilation. Very, very glad to still be able to discover and appreciate bands I wasn't listening to before. Brendan Perry's voice is quite unique. These songs are filled with spiritual devotion.

What's up? Tell me about it. Been looking for some new cool gear to do multi-track recordings in my studio. Can you believe one manufacturer went from a Linear PSU to an SMPS in a new model of a multi-track interface and thinks they resolved an overheating issue like that? So now, this is quite a common issue I have seen on the production side of things lately: various SMPS used in different pieces of equipment, even some new(ish) synths. Mind-boggling, really.

I did recording captures at the DAC output, using a pure Sine generated by Audacity using the M-Audio Fast Track Pro as capture interface, then did FFT on the results. Maybe you missed those? That's in and for my system. Not ideal for sure (I did mention caveats in my post). For good measurements, go ahead and do the same in your own system. I am fairly sure you have better measuring gear than I do. I disagree with your perception of 'no rational explanation': from what I gather it is the same phenomenon by which grounding works within a system, apart from the intriguing thing that some people mention with Entreq, i.e. it takes some time for the effect to come on. I haven't experienced this in my system: the external 'grounding' effect occurs immediately. So for my own experiments: I see nothing other than the simple contraption allowing dirty currents away from areas where they were previously wreaking sonic havoc. It's nothing more than improving returns IMO, so no exotic or new physics is needed here (apart from that thing above). What's not needed though is the bookish statism and inherent misconclusions ("this shouldn't make a difference, therefore this doesn't work"). @PeterST has done a lot of measurements exactly like that, especially at the computer-side planes IIRC. As for me, I have nowhere near the gear I'd like to do extensive and more precise measurements but you probably do, don't you? So the captures and FFT are what they are. I agree. However, I am not publishing any paper here. Try it for yourself like in a build, listen, and make your own conclusions and measurements. You may not have any better sound, but that's fine too by me: it might be that your system already is properly grounded throughout, so no additional benefit can be obtained.