DCF77 reception interference due to pulse power supply operation

TechEkspert wrote:

I put additional filters on a few LED fixtures because they were interfering a lot with RTL-DVBT dongle listening

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Out of curiosity, what filters?

I had space in the fixture so I used a separate board, this type https://www.gotronik.pl/filtr-sieciowy-przeciwzakloceniowy-emi-2a-p-12023.html only single stage.

But such a filter probably only eliminates interference that could go into the mains. What goes into the ether directly from such a power supply will go anyway. The only good thing is that the mains power supply as an extensive" transmitting antenna" will radiate less junk.

gulson wrote:

The manufacturer of such power supplies should be punished!
This is unthinkable.
How is a non-technical person supposed to function in this world, how is he supposed to know why a watch goes out of sync and what else.

Administrator! Absolutely right. Maybe report it to the CBA while it still exists?

My DIY DCF has a signal indicator in the form of an LED on the signal line, if it flashes rhythmically around 1 Hz - it is ok. Irregular or continuous light - disturbed signal.
DCF reception is completely prevented by a switched-on CRT TV standing in the other room, about 2 m from the antenna.
On the other hand, a switched-on Lenovo laptop with HP monitor (CCFL) completely prevents PR1 225 kHz reception at my place (but does not interfere with DCF).

ledo99 wrote:

@CosteC this is not possible - the device has to pass approval as a whole - as for the rest - cheap was not...

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Let's look at the instructions first. Then to the standards perhaps?

And seriously, devices in practice are divided into commercial and industrial. For commercial they must comply as supplied ("as a whole"). Industrial not necessarily as far as I know - you can sell an inverter without a filter as long as it is documented and the appropriate filter is available, documented. It also makes sense because there are different standards: EU, Chinese, US and so on.

Why?
E.g. we have 3 inverters side by side in a machine and one filter to prevent interference leakage outside the machine. Cheaper, smaller, better but requires an informed user.

Back to the topic: What is the model of the heat pump? What does the manual say? What does the invoice say?

kris8888 wrote:

But such a filter probably only eliminates interference that could go into the mains. What goes into the ether directly from such a power supply will go anyway. The only good thing is that the mains as an extensive" transmitting antenna" will radiate less junk.

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The filter reduced the shortwave interference heavily, here I used a filter from a broken ATX power supply: Reducing interference from an LED plafond power supply. .

TechEkspert wrote:

kris8888 wrote:

But such a filter probably only eliminates interference that could go into the mains. What goes into the ether directly from such a power supply will go anyway. The only good thing is that the mains as an extensive" transmitting antenna" will radiate less junk.

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The filter reduced the shortwave interference heavily, here I used a filter from a broken ATX power supply: Reducing interference from an LED plafond power supply.

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Nice article, nicely done FFT. Not many people know how to set up the FFT correctly on an oscilloscope .
Interesting, this platoon has good PF - little distortion. But it sows. Well, but how is it not sowing when the filters are poor....
Informative. Thank you.

ledo99 wrote:

@CosteC a very please you: https://www.logicool-ac.com/wp-content/uploads/2014/05/WH-MXC-J3E58-Installation-Manual.pdf - typical 9kW monoblock - I don't see a word about EMI/EMC

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If I look at the service documentation there are plenty of filters. If it's interfering then maybe it's faulty or badly installed?

What we have in civilised countries to combat such banditry are standards and the legal obligation to comply with them. It is the failure to comply with CE marking conditions that causes similar problems.
Our popular auction site is rife with Chinese production that does not comply with any standards. All these items are the same as those on the popular Chinese auction site, the only difference being that there they are available 2-5x cheaper.
The penalties for placing a substandard device on the market (illegally CE-labelled) are very high, only that somehow nobody seems to care. 8 years of practical impunity in this area have taught people that they can get away with anything. Now, on the other hand, there is a war situation and, on top of that, the economy is going downhill. Sometimes, however, the state gradually starts to remind itself of its capabilities and then....

ledo99 wrote:

I do not have access to service documentation

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Google my friend in this case.

ledo99 wrote:

now I'm wondering about an inverter fed three phase and doing one phase 30A

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Efficiency will not drop significantly?

ledo99 wrote:

then I would probably also address the interference problem.

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I would check the PE continuity "already". Although the chances are small the consequences are unpleasant. And this is probably the simplest problem.

I'm starting to hear Christmas tree lights and all the decorations on the bands from 10 metres down from about 3pm, it's slowly going from a background of 3s to 9s, just 3 weeks ago it was quiet at this time.

Probably not everyone yet knows how to turn off the blinking in the lights .