The conclusion is:
It has electrical currents, 90 per cent of which are not electrically damaged or transformer garbage。
The culprit is the radiator。
The solution is simple to the eccentricity of finding a guidance line, a heat sheet, and a surface line to the main filter。
Ten minutes, zero cost, from the sound of the current to the sound of the ear, “six metres away” to the sound of the ear。
I. Where does the current sound come from
The large power tubes of the operation shall be installed to disperse the heat on the radiators. There is a thin insulation tablet between the back of the tube and the radiator. The thin layer actually creates a parasitic form — it can't flow through, but 50 hz exchanges “through”。
Even more problematic is the fact that dispersants themselves are often suspended (without site). The internal transformers, power lines and current bridges are exposed to external radiomagnetic interference, and this large metal-dispersioned piece is like an efficient receiving antenna that collects all the noise。
The noise collected was then injected directly into the audio circuit through the parasitic capacity and amplified from the horn — that's the annoying current。
Solutions: giving the noise a “road home”
We're going to force the radiator to the ground level。
Noise is cut directly to the ground and no longer colludes。
That's it。
Three steps down, do it。
First step: find the "ground line" of the capacitor
Most household appliances are powered by double power: two large filter caps are linked, with the middle link being the surface. Usually, this point leads to a black line (red = positive power, blue = negative power, black = ground)。
This black line is what you're looking for。
The problem is that it seems difficult to unload the plate and weld the connection at the connection point, or weld the wire。
Step 2: find a good welded "wire" points
The lines of the circuit are connected and, in order to prevent a faulty connection to the other black lines, a red, blue and black line is sought directly. This black line is connected to the electric line. You can take a little skin off your head online and weld the wire. It's simple and safe。
An operational ground position
Step three: connect to the radiator
At the other end of the short-wire line, the screws are reliably fixed to the metal part of the dispersed plate (preferably with a weld or gasket)。
How powerful is it
After remodeling, i completely lost the current sound. It was clear that the sound of “humming” was heard six metres away, and now the ears are attached to the soundbox, and the currents are almost negligible. And the sound is purer and permeable -- the background is clean and the details come out。
Iv. Important reminders (must see)
This “place” is not the “land”: it is followed by the filtering of the electrical cap (power reference) rather than the “ground” of the municipal electrical plug. The power discharge source is typically a two-legged plug without a terrestrial line. It is important not to put the radiators directly into the family line (the floor of the wall plug), which is likely to introduce new noise and even electrocution risks。
