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+--- Thread: Linear power supply (/showthread.php?tid=2307)
RE: Linear power supply - kriu - 2017-09-11
(2017-09-11, 14:52)pasense Wrote: Any suggestion for low-noise power supplies which are for sale here in Europe (and which are affordable)?
Maybe apply a suitable, simple low pass LC filter?
RE: Linear power supply - allsorts - 2017-09-17
(2017-09-11, 19:31)kriu Wrote:(2017-09-11, 14:52)pasense Wrote: Any suggestion for low-noise power supplies which are for sale here in Europe (and which are affordable)?
Maybe apply a suitable, simple low pass LC filter?
That is all the inline filter above that effectively kills the noise from the supply. Still have the "spare" PCB if anyone would like it. Takes a couple of torids from Amazon/eBay with provision for two capacitors on the in and out side.
RE: Linear power supply - readbueno - 2017-09-18
(2017-09-17, 19:05)allsorts Wrote:(2017-09-11, 19:31)kriu Wrote:(2017-09-11, 14:52)pasense Wrote: Any suggestion for low-noise power supplies which are for sale here in Europe (and which are affordable)?
Maybe apply a suitable, simple low pass LC filter?
That is all the inline filter above that effectively kills the noise from the supply. Still have the "spare" PCB if anyone would like it. Takes a couple of torids from Amazon/eBay with provision for two capacitors on the in and out side.
Could you show us a picture of it and where it fits, i.e. will it fit inside the case for Blue somewhere, or is it a separate "box?" Simple Circuit Diagram?
Or is it on the output of a PSU, Would it fit in the box with a small linear PSU. I am waiting for components to build a small linear PSU hopefully it won't
have too much noise at the frequencies of interest.
Brian.
RE: Linear power supply - kriu - 2017-09-19
Is such a filter like that could help reduce the noise?
Or similar by home made.
RE: Linear power supply - RichoAnd - 2017-09-19
See this thread :-)
https://forum.blitzortung.org/showthread.php?tid=1802&pid=12151#pid12151
/Richo
RE: Linear power supply - allsorts - 2017-09-22
[quote pid='15696' dateline='1505725678']
Could you show us a picture of it and where it fits, i.e. will it fit inside the case for Blue somewhere, or is it a separate "box?" Simple Circuit Diagram?
Or is it on the output of a PSU, Would it fit in the box with a small linear PSU. I am waiting for components to build a small linear PSU hopefully it won't
have too much noise at the frequencies of interest.
[/quote]
A half decent linear supply won't need a filter...
Have a look at this thread:
https://forum.blitzortung.org/showthread.php?tid=1911
There is a picture of my filter to the left of the naked PoE splitter. I think there are some more somewhere showing my installed controller, but I can't kick the forum search into finding that thread....
RE: Linear power supply - pasense - 2017-11-07
Does anybody has information about the noise of the following power supply:
MeanWell RS-15-5 15W Single Output Switching Power Supply
RE: Linear power supply - readbueno - 2017-11-07
Hi Pasense, Here is the Data sheet for this PSU.
http://meanwellusa.com/productPdf.aspx?i=1#1
The operating frequency is listed as 47 to 63 kHz, but there is no mention of how much that appears at the output separate from the overall voltage variation.
I hope this is of some use.
Brian.
RE: Linear power supply - pasense - 2017-11-07
Thanks, but this info was already available at Amazon, I should have been more specific with the question!
Here it is: the data sheet gives the noise with 80 mV pp maximum, but does anybody know how that is in reality? Does anybody have a hands-on experience with this power supply together with system blue?
RE: Linear power supply - allsorts - 2017-11-07
If it really does have 80 mV of 50 kHz (+/-) on the output it might be too noisy for a blue controller. The TL-POE10R I use to power mine had about 100 mV P-P noise and the controller wasn't happy. The simple two toroids and capacitors filter cured that though reducing the noise to 5 mV P-P (if the V_in monitor on the signals page of a controller is to be believed).