The true experimental tweak thread

[marce]

I agree with One and a half and Cornan, mains can be deadly, I therefore don't give any advice on messing about with it. Looking at the photo of the transformer it looks like X11 is hard wired to X10 with a jumper and is possibly the electrostatic screen connection, but I am not sure and data on the web is limited.

This is one area where safety is paramount, my self I would get a qualified sparky to have a look and test the installation for safety, as the blown tant shows a lot of energy can be released and its not just electric shock hazzards its also fire hazzards.

Keep safe, please.

[marce]

I would join this site and staart reading the information available on the site.

 

http://www.compliance-club.com/free_registration.aspx

http://www.cherryclough.com/electronic-design-techniques-for-emc

 

[marce]

Rather busy at the moment, Mums not well so I'm having to sort her affairs!

Been looking for this, an easy read and relevant to what Cornan is doing. If you can find the same guys EMC Rants on line they are worth a read. I have PDF's but I am not sure of the copyright so don't want to post them.

http://www.audioemc.co.uk/wp-content/uploads/2014/04/Pages-from-HFC_issue33-4-Waldron-EMC-short.pdf

[marce]

I have used thes in the past, probably overkill current wise, but worth a look, also used them with their related Vicor isolated power modules...

http://www.vicorpower.com/documents/family_overviews/picor/fo_QPI-input-filters.pdf

 

 

[marce]

I'll have a look at the data sheet later.

The Picor/Vicor stuff I use on military and aerospace layouts, where low noise and isolation of SMPS's is paramount. Used them quite a lot on some of the ANVIC-5 stuff and a couple of other projects. There are lower voltage versions of the picor stuff.

[marce]

3 hours ago, BigGuy said:

I believe Cornan was the one who posted the article by Tony Waldron which was interesting.  In the References an earlier 2-part article is also mentioned which may be even more valuable tho' I have not read them as yet...

 

https://translate.google.com/translate?hl=en&sl=ja&u=http://t-sato.in.coocan.jp/emcj/0209-101-j.html&prev=search

 

https://translate.google.com/translate?hl=en&sl=ja&u=http://t-sato.in.coocan.jp/emcj/0209-101-j.html&prev=search

I did.

Those were the links I mentioned I couldn,t find. Cheers.

[marce]

Bloody engineers, don't know nowt...

[marce]

24 minutes ago, Cornan said:

Reading this...

 

 

...makes me wonder why I should´nt try a DC2.1/5.5mm female socket>short wires between positive and negative terminals>ELNA silmic II 1000uF>DC2.1/5.5 male plug pre my Aqvox switch, ISO Regen and Aries Mini? In other words just letting the Gophert supply the regulated voltage and the capacitors to take care of the leakage. Would that actually work and block DC leakage into the device?

 

I hope you all realize that I am thinking out loud here, since my knowledge of capacitors is very limited!

 

What do you mean DC leakage... Caps block DC and pass AC

[marce]

Happy Christmas, Cornan and everybody else.

[marce]

21 hours ago, Monge said:

Good Luck with your new appartment and your new life 

 

I was Reading about the new IFI AC Purifier

https://ifi-audio.com/portfolio-view/accessory-ac-ipurifier/

I really don’t understand how this unit possible could reduce AC noise. As I see it is a kind of filter, but active?

Regards Monge

The signal or power being filtered has to pass through the filter, you cannot t a filter off a line and expect it to filter. The problem is the noise does not know it has to turn a corner and go down the track to the filter, instead it goes straight past to the load.

[marce]

2 hours ago, Cornan said:

I’ll guess these are the sorts of challenges an EE would face on a daily basis. I’ll bet they’ll laugh their heads off reading this challenge! ?

 

@Speedskater & @marce where are you? I could use a little support here! ?

All mains fluctuates in voltage, depending on where you live, nearby loads... the list is endless, add powerline communication, internal loads, nearby loads, etc. Filtering and over-voltage protection can help with the incoming mains, brown outs (Dips in voltage, in the UK there are dips after soap operas as everyone puts the kettle on, less now there is catch up TV.) are down to the relevant PSU and how it holds up. To determine how bad your mains is you have to monitor it for quite a while, not easy without the right kit, and that's not cheep to even hire. Then you have to realise most components are made to cover a large market, the demand for lower cost products and the requirements for lower power consumption (regulations on PSU efficiency, not the best idea as running a SMPS at peak efficiency and low noise requires the optimum components, this cost money... compromises are made and efficiency requirements are met, the net loss is a slight increase in overall noise, add the numerous cheep phone chargers etc. plugged almost constantly and you don't laugh.