Well, this message indicates that IBM may still be on the “bleeding edge” of R&D.
All those clever guys in Germany desperately need IBM.
Hans
All those clever guys in Germany desperately need IBM.
Hans
Need some feed back. This is a layout of an unregulated PSU, one for each channel. each one carries 0 +/- 6 VDC and a 310 VDC supply. On the board is small transformer for the 6V and the larger one off board is for the 310V.
Does this layout look OK?
Should the transformers be laid out differently?
Should I take the small transformer off the PCB?
Thanks in advance for any feedback!
Does this layout look OK?
Should the transformers be laid out differently?
Should I take the small transformer off the PCB?
Thanks in advance for any feedback!
Attachments
All I see are component placements The connections are critical.
This article is actually a good set of directions for any layout: https://www.edn.com/satellite-avion...imesDaily-20210621&oly_enc_id=7354C0960023D2R even if not part of a spacecraft. I use similar tricks to keep the "windows" around power supply components minimized. The key is to follow the flow of each current path.
This article is actually a good set of directions for any layout: https://www.edn.com/satellite-avion...imesDaily-20210621&oly_enc_id=7354C0960023D2R even if not part of a spacecraft. I use similar tricks to keep the "windows" around power supply components minimized. The key is to follow the flow of each current path.
Thank you Demian!
I worked for JPL. We made satellites there, but our group did deep space optical communications, and I did opto-mechanical. I will pour over this paper.
I worked for JPL. We made satellites there, but our group did deep space optical communications, and I did opto-mechanical. I will pour over this paper.
Well it appears that hi end audio design is dead on diy audio. To be sure, it still exists, just not here.
There are a few people in the forum doing that sort of thing, but not much discussion by the folks in this thread. Maybe we need a John Curl Vendetta Preamp thread? 🙂
All the really original thinkers and good guys either leave or get boo-ed off the stage.
Especially, if you say you can hear differences. But, actually JC is correct about diy audio. Dying out fast as his generation dies off. I just turned 76. Maybe got one more interesting thing to say which will Move the Needle of audio/sound repro.
Enjoy...
Especially, if you say you can hear differences. But, actually JC is correct about diy audio. Dying out fast as his generation dies off. I just turned 76. Maybe got one more interesting thing to say which will Move the Needle of audio/sound repro.
Enjoy...
You left out evidence. It should've been, "if you say you can hear differences without accompanying it with supporting evidence".
Good to see you around here r, and hope your health is doing well over there.
edit: with regards to audio big tech is already, in cohort with mockingbird media, pushing wearable technology, the younger generation are happy with their mobile phone and wireless earbuds..
edit: with regards to audio big tech is already, in cohort with mockingbird media, pushing wearable technology, the younger generation are happy with their mobile phone and wireless earbuds..
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By observing the DIY audio scene for almost 2 decades, what is currently happening is, in my opinion, a total change in DIY audio focus. 20 years ago the focus was on designing what appeared to be innovative audio electronic reproduction solutions, including new circuit topologies, applying old but general electronics principles to audio electronics, etc... essentially what Mr. Curl partly enjoyed (when not going on tangents). After quite some time everybody realized (more or less explicitly) that ultimately these improvements do not matter, our hearing cannot tell much of these improvements, anyway, and the interest in such decreased constantly. Good engineering resources migrated away from DIY audio, the usual subjective noise, and the disregard for the First Principles, did not help too. Migrating good components either to /dev/null or to DIY unfriendly SMD was, and still is, a factor too. Sadly, the appetite for knowledge, in particular in the STEM domain also, independently, decreased significantly.
Since people soldering and testing PCBs, the focus moved to assembling pre-build components (coming usually as boards) and subjectively evaluating the results. This includes as a big part the components manufacturers claims regarding performance, which are many times as full of **** and sales driven as they used to be 20 years ago.
So there's very little practical DIY today, no PCB design, very little, if at all, soldering, very little if at all test gear. There are a bunch of DIY audio aficionados today that don't even have a decent scope or multimeter, in despite of the amazing drop in pricing! This has as little to do with good engineering as it could, so no wonder good engineers were driven away even further.
Short of this new approach, what's left is repairing old audio equipment and speaker design and construction (which is a VERY good thing for audio development in general). And of course, a handful of hardcore DIY audio people, many of them, as you say, on their way out.
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Do you think the rise of DIY robotics and ‘maker’ communities along with cheap, highly capable microcontroller boards has sucked a good part of the audio DIY community away?
People are still doing good stuff, but there’s definitely less of it going on. As for audio in general, I think it’s the DIY community that’s pushed the envelope wrt amplifier performance and there are some seriously good speaker guys out there as well.
People are still doing good stuff, but there’s definitely less of it going on. As for audio in general, I think it’s the DIY community that’s pushed the envelope wrt amplifier performance and there are some seriously good speaker guys out there as well.
No, I don't think this hobby sucked away anything out of the DIY audio community.
Maybe, I don't know on the first part, for the second I fully agree. In fact, if I could restart the diyaudio hobby today I would very likely start with speakers. Now, if only speaker building would not be such a messy piece of art, I could probably go for it, anyway.
For the right money, anybody could order custom made cabinets or finished cabinet parts (I know I have the resources and places I could go for). But then somehow I suspect it would be like gluing a Stradivari out of a kit... not much fun in screwing and wiring drivers on a baffle.
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You guys don't get it. It's the music!!!
You don't need high end audio to enjoy rap/hardcore/electro/techno "music"; they actually sound better with highly tuned gear once calle "boombox". The whole market/industry started screaming "No future, No future" (Sex Pistol) as far back as the punk era.
You don't need high end audio to enjoy rap/hardcore/electro/techno "music"; they actually sound better with highly tuned gear once calle "boombox". The whole market/industry started screaming "No future, No future" (Sex Pistol) as far back as the punk era.
Could it be "as his generation dies off", so with it goes the understanding of what "high end" even means - and sounds like?
Perhaps like a language, you have to have grown up in it, with it, to get and then refine the subtleties.
There is dilution - so many higher level things going on. As I recall, it was difficult to find / hire a good analog engineer. Most are versed in code, microcontrollers, two wire bus protocols and peripheral chips. Hook it up and it works, if it doesnt, fix it in software. (if that doesnt work, call over to the power supply group, with their oscilloscopes and diff probes, to come look at something called "ground bounce" - whatever that is...)
Perhaps like a language, you have to have grown up in it, with it, to get and then refine the subtleties.
There is dilution - so many higher level things going on. As I recall, it was difficult to find / hire a good analog engineer. Most are versed in code, microcontrollers, two wire bus protocols and peripheral chips. Hook it up and it works, if it doesnt, fix it in software. (if that doesnt work, call over to the power supply group, with their oscilloscopes and diff probes, to come look at something called "ground bounce" - whatever that is...)