Thanks for the schooling, as a electronics hobbyist it's very much appreciatied! (that said i do handle MagnaPower 6000 amp switchers at work now and then) :D
Great stuff Eddie, I have been putting small value caps across the 4 diodes on my bridge rectifiers when I build simple linear ( low freq. switchers?) power supplies for power amps. Thought was to reduce noise as the diodes switch the 60 Hz AC to the pulse DC , is this necessary and does it really do anything at all ?
Thanks for your feedback! Yes, it does help to place (physically close to the switching diodes) a capacitor at the input and output of the bridge. Use a ceramic or Film cap at around 1 uF. An inductor before the rectifier and after (with caps on both sides) will help too.
Could you a do third one in this comparison showing fast Fourier transformation view.. Also, I’m confused that the switching mode power supply is noisier than the linear, when some of our other videos seem to show that switching mode power supplies can be cleaner/less noise… so this seems to be an issue of maybe “less than optimal care and attention to detail” on the switching mode power supply re filtering of its outputs.. Maybe a different switchin mode power supply has a cleaner output? Do you have one that is cleaner?
Thanks for the great feedback! I'm not sure what videos or examples that you are referring to, but let's say it was an Audio Amp output; the THD with the switcher might look better as the HF is easier to filter, and an amplifier with a low frequency switcher (what some call a linear) would have THD at the lower frequencies (60 or 50 Hz multiples) due to the rectifier switching.
The high frequency noise is actually not that hard to filter as it takes smaller parts to do it. It also looks so much worse than low frequency noise which is very hard to get rid of. Audio folks and 60 Hz noise for instance;)
I am back on it - I'll be doing a video soon. I got caught up trying to get some reviews done to send the equipment back. I love vendors supporting the channel - and I need to get the video out which I hope helps those that can't see this stuff on their own. But I am going to go in a design phase soon;)
Oh no science interfering with the magic of earth ground boxes. This discounts the grand placebo effect. Discounting out of band noise can be seen as disingenuous for those who live way down in the weeds. Given your day job requires results chasing some small noise may not be productive. I do understand your view point.
Thanks for your feedback. I have the kind of job that I can spend weeks trying to find some noise issue. I can tell you that 'ground' has nothing to do with noise - and CAN NOT get rid of it. Anyone saying different is disingenuous. I am not selling anything - and I have far higher engineering experience than any of these people - i can guarantee you. I'd love to have a debate with these folks. I am only trying to spread the word of real engineering and to keep people from falling for snake oil.
@@KissAnalog Terminology used for the last century caused the problem IMHO . Safety ground and the zero voltage point in a circuit being a bit different from each other . By not being clear and using the same term ground as the return in a single ended circuit and the safety return for the power grid cause people to think their the same thing When they are referenced to the same point but are two systems that are tied to each other. The snake oil sound is refined placebo thus it source of value to the buyer.
Lol some people 🤣 just dont get it smps noise like you showed will never reach your ear 😂 well unless you are an alien with telepathic abilities 😮. No but some of us know that the jobs you do are classified. Thats all i have to say on that. The audiophiles are upset because they spend thousands on a fancier piece of covered wire and thinks it sounds better . Unfortunately like flat earthly people , you will never change there mind. Well atleast flat earthly people you can just take up to space and prove it . And there is youtube videos of that, well atleast high enough to see thats its round, pretty close to it 😂.. so my question is isn't that why there is multiple grounds in a supply?? Like analog, digital . But isn't it just a basic reference point . Example like 4v is lower than 5 so more negative but also could be used a a reference?
No sense in making videos now. I WANTED Tests done on rca cables hooked to an old school 70s receiver and you wouldn't go out and get an old receiver. Instead of this class d bulllllll SO no more support here. I'm the guy that the world watches with
@joeyjustin6895 I'm sorry that you haven't watched my videos or understand what I am doing has answered your desire....watch this and see if it helps...ruclips.net/video/CixXCmkX_5E/видео.html
Thanks - I am super busy these days. My job has me on a big project and then I try to squeeze in videos between family events. RUclips is like a part time job - with low pay;)
Thanks for the schooling, as a electronics hobbyist it's very much appreciatied! (that said i do handle MagnaPower 6000 amp switchers at work now and then) :D
OK - that's scary power!!!
Thank you Eddie, great tutoring, and also an amazing video. Thank you so much.
Glad you liked it!
Thanks!
Thanks so much for your generosity!!!
Great stuff Eddie, I have been putting small value caps across the 4 diodes on my bridge rectifiers when I build simple linear ( low freq. switchers?) power supplies for power amps. Thought was to reduce noise as the diodes switch the 60 Hz AC to the pulse DC , is this necessary and does it really do anything at all ?
Thanks for your feedback! Yes, it does help to place (physically close to the switching diodes) a capacitor at the input and output of the bridge. Use a ceramic or Film cap at around 1 uF. An inductor before the rectifier and after (with caps on both sides) will help too.
I want to do more testing, but so far with a linear ps, the noise picked up by the scope leads, far exceeds noise generated by the ps.
Thanks for your feedback. I think I have a video that might make sense of this. I'll see if I can post it very soon;)
Could you a do third one in this comparison showing fast Fourier transformation view.. Also, I’m confused that the switching mode power supply is noisier than the linear, when some of our other videos seem to show that switching mode power supplies can be cleaner/less noise… so this seems to be an issue of maybe “less than optimal care and attention to detail” on the switching mode power supply re filtering of its outputs.. Maybe a different switchin mode power supply has a cleaner output? Do you have one that is cleaner?
Thanks for the great feedback! I'm not sure what videos or examples that you are referring to, but let's say it was an Audio Amp output; the THD with the switcher might look better as the HF is easier to filter, and an amplifier with a low frequency switcher (what some call a linear) would have THD at the lower frequencies (60 or 50 Hz multiples) due to the rectifier switching.
What objectives in terms of noise etc. do high frequency devices require? Oscilloscopes, freq analyzers
The high frequency noise is actually not that hard to filter as it takes smaller parts to do it. It also looks so much worse than low frequency noise which is very hard to get rid of. Audio folks and 60 Hz noise for instance;)
how is the APFC series progressing?
good question
I am back on it - I'll be doing a video soon. I got caught up trying to get some reviews done to send the equipment back. I love vendors supporting the channel - and I need to get the video out which I hope helps those that can't see this stuff on their own. But I am going to go in a design phase soon;)
@@KissAnalog great
Oh no science interfering with the magic of earth ground boxes. This discounts the grand placebo effect. Discounting out of band noise can be seen as disingenuous for those who live way down in the weeds. Given your day job requires results chasing some small noise may not be productive. I do understand your view point.
Thanks for your feedback. I have the kind of job that I can spend weeks trying to find some noise issue.
I can tell you that 'ground' has nothing to do with noise - and CAN NOT get rid of it. Anyone saying different is disingenuous.
I am not selling anything - and I have far higher engineering experience than any of these people - i can guarantee you. I'd love to have a debate with these folks.
I am only trying to spread the word of real engineering and to keep people from falling for snake oil.
@@KissAnalog Terminology used for the last century caused the problem IMHO . Safety ground and the zero voltage point in a circuit being a bit different from each other . By not being clear and using the same term ground as the return in a single ended circuit and the safety return for the power grid cause people to think their the same thing When they are referenced to the same point but are two systems that are tied to each other. The snake oil sound is refined placebo thus it source of value to the buyer.
Lol some people 🤣 just dont get it smps noise like you showed will never reach your ear 😂 well unless you are an alien with telepathic abilities 😮. No but some of us know that the jobs you do are classified. Thats all i have to say on that. The audiophiles are upset because they spend thousands on a fancier piece of covered wire and thinks it sounds better . Unfortunately like flat earthly people , you will never change there mind. Well atleast flat earthly people you can just take up to space and prove it . And there is youtube videos of that, well atleast high enough to see thats its round, pretty close to it 😂.. so my question is isn't that why there is multiple grounds in a supply?? Like analog, digital . But isn't it just a basic reference point . Example like 4v is lower than 5 so more negative but also could be used a a reference?
Thanks so much!! I appreciate you and your feedback!
No sense in making videos now. I WANTED Tests done on rca cables hooked to an old school 70s receiver and you wouldn't go out and get an old receiver. Instead of this class d bulllllll SO no more support here. I'm the guy that the world watches with
Why would you want that done? There are hundreds 💯 out there rca on a 1970's receiver 😂
Are you having a temper tantrum because he hasn't done what YOU want?
@joeyjustin6895 I'm sorry that you haven't watched my videos or understand what I am doing has answered your desire....watch this and see if it helps...ruclips.net/video/CixXCmkX_5E/видео.html
I don't have a problem with class D
@joeyjustin6895 I'll tell you what - if you want to send me an old school receiver - I will do this test and give you a shout out;)
Hi there eddie... Nice videos. Btw, i hope you can check your email if you have the time. I know how busy you are, keep it up, God bless.
Thanks - I am super busy these days. My job has me on a big project and then I try to squeeze in videos between family events. RUclips is like a part time job - with low pay;)