For a moment there, i thought you'd somehow managed to bypass the interlocks and microwave your hand
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WiiM Ultra Streamer Preamp Review
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Miguelón
Major Contributor
Another possible explanation, but in fact I was happily watching my soup wandering while thinking how safe I was protected by the Faraday cage that surrounds the oven… seconds later when I hold the cup, I open involuntary the hand because overheated recipient and throwing the content over the other hand.For a moment there, i thought you'd somehow managed to bypass the interlocks and microwave your hand
Curiously in my job (physiotherapist) we have a microwave machine to heat patient’s muscles and other parts of their bodies. Is rarely used this days, replaced by capacitive and resistive electric transfer (CRET therapy).
That cage leaks like a sieve. As evidenced by the fact that the audio streaming over wifi to my airplay speaker shuts down when the microwave is running. Hence my comment above.
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Miguelón
Major Contributor
I didn’t know that this could happen, but when the microwave machine is working the ancient cathodic rays computer monitors had a lot of strange diagonal lines and moving patterns on the screen…That cage leaks like a sieve. As evidenced by the fact that the audio streaming over wifi to my airplay speaker shuts down when the microwave is running. Hence my comment above.
I’m curious, Airplay works receiving and emitting from the iphone/ipad or is the router that emits to the device?
somebodyelse
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That's not normal. It might be wise to get your microwave checked out.That cage leaks like a sieve. As evidenced by the fact that the audio streaming over wifi to my airplay speaker shuts down when the microwave is running. Hence my comment above.
Miguelón
Major Contributor
My WiiM gives me an electric static mini-shock each time I touch it… it also gives me some vibration when I pass the finger over the box.
Someone suggested me that my electric network is not properly grounded, but my monitors have 3 pin mains cable and don’t do that.
Sokel
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Are you in a country that you can plug mains both ways?If yes try the opposite.
You can measure the voltage on the case l with a DMM too if you have one,let me know if you do to tell you how.
Edit:I just saw it uses a two-prong,scrap the above.
You shouldn't have that.
morillon
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there were serious problems of this type with the very first amp ( with machine reboots in case of discharge) (and strange ones with the pre-series of the ultra power supply) while class2... not normal...
seems to have been rather resolved afterwards... is your wiim from the very beginning of marketing?
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It's absolutely normal. All microwave ovens leak. It is massively attenuated from what is inside, but comparable in level to the wifi, and at the same frequency (2.4GHz). Bear in mind it is not a full faraday cave. There is a slot - at least all around the door.
Over the wifi, so to the wifi access point/router and then back out again.
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Again - that can be quite normal. If you have class II (non grounded equipment), then any leakage (normally capacitive) of noise (including noise from the mains supply) goes to the chassis and has no-where to drain to. It can be quite a significant ac voltage, but very high impedance, so all it can do is tingle. There is no current capability behind. it.
Though it can be particularly strong when you have a bunch of class II devices connected together, and you get the combined leakage current of them together. My AV System with TV, AVR, Settop box, DVD player - all connected together, would be quite uncomfortable when I unplugged the antenna cable with a metal plug. In the day's when I had an antenna cable. You only need one class I (grounded) device in the mix, and you never see it. Everything drains to earth through that.
EG:
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Sokel
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I know it is,it doesn't even register in an amperemeter.
It can screw measurements big time though,both class I and II devices.
You see mains noise which is normally buried in the FFT's 130-140dB depths rising to even -80dB.
Inaudible of course but not good for the optics if you have REW's RTA almost always on
Sorry - I meant to reply to @Miguelón s post
If you want to check your outlets, hardware stores (and Amazon) have wall outlet checkers for around $10 which will quickly tell you if the outlet is properly wired and grounded. Very easy to use -- just plug in and see the results.
Miguelón
Major Contributor
Thanks, I guessed that was because of the 2 pin plug (class II) but was not sure.
I don’t know if is due to leaking or something else, but my WiiM doesn’t sound good even connected by proper RCA to XLR cable, so I use my audio interface.
It has the advantage of reducing signal with its attenuator (analogue), so the volume of the WiiM remote can be nicely smoothed (normally goes on 32-33 steps from 0 to 100 but 8030C are so sensitive that was confined between 20 and 40 on many tracks).
Miguelón
Major Contributor
Was purchased a month after releasing, but don’t find any issue apart from some minor quality sound with respect to my audio interface, but maybe due to interference or leakage, better match of signal voltage…
In my house there are a lot of static charge, I don’t know why. At work I didn’t feel electric little discharges, only at home but are just surprising and not at all alarming.
My question was made just by curiosity, I thought was due to some class I electric components because almost all electronic stuff in my clinic are grounded.
Yes, indeed, definitely no microwave. Mobile phone only with a wired earpiece or over the speaker and using a stylus, not my fingers, and keeping it as far from my body as possible. This may sound like a joke but after using a good radiation meter I think differently now ...Hope you've also banned microwave ovens from your home - also mobile (cell) phones.
You understand the difference between ionising and non ionising radiation?
You realise you are bathed with EM radiation all the time. Whether that is TV or Radio signals, WIFI or bluetooth, a load of stuff from the sun. Every light source on the planet. Fields from all the power wiring in. your house, Stray electromagnetic emissions from the computer and monitor you're using to chat here.
And radio signals from your phone are just as strong as from your wifi router. If it is safe a few inches from your body, then so is your wifi router at the other end of the room.
Miguelón
Major Contributor
Even ionizing radiation are all around: natural (radon from air, cosmic rays from space and Earth’s radionuclides) and human made (medical, commercial, industrial…).
I think there are so called "radiation meters" on sale to fool people ,sadly .
EM radiation is only realy dangerous as X-rays or gamma ie ionising and UV for the skin .
If you micro are unshielded you may cook yourself
then its dangerous .I should be dead otherwise I've been in EM fields of such magnitudes that you cant use crt monitors ( the picture collapses ) and in magnetic fields such as you can feel in your hand tools , the screwdriver want to orientate in a certain direction
( 50 to 120kA of DC does that. )There is subset of the population that think they have "Electrical allergy" or what you may call it in English . Proper lab tests have shown that these people are only affected when they know that there is electricity around "sighted testing" as we call it on ASR . Otherwise they can be submitted to any kind of field without symptoms .
