.....when I plug in the charger I start here[sic] a hum, the hum goes up and down in volym[sic] in sync with me turning the TV sound up or down, I directly thought that its a ground loop.
Not that the following changed my mind but even when I hold the charger in one hand and the phone in the other hand I get that annoying hum.
Might it be noise from the switcher in the charger perhaps?
Hee, hee. There is no such thing as a "perfect" filter. Simply unplug the charger when you are on the phone.If it helps then audioguru can advise you how to make the perfect filter.
Thanks audioguru, we needed the approval of the top authority in audio.Hee, hee. There is no such thing as a "perfect" filter. Simply unplug the charger when you are on the phone.
How come that even without the filters we sound like chipmunks.If you make a second-order Butterworth Sallen-Key highpass filter circuit with its -3dB at 300Hz so adult males sound like chipmunks,
I get a phone call every day from an adult guy in Pakistan (they showed the huge call center on TV) who has a soprano voice that sounds like a chipmunk. He is selling "Duck Cleaning". I tell him to stop bothering me because my Ducks (QUACK QUACK) are clean enough. I bet he has never seen a air duct. 10 local duct cleaning companies have been fined for soliciting business on the phone. The companies thought they would not be fined because they did not make the phone calls that were from the other side of the world.How come that even without the filters we sound like chipmunks.
I've made for myself a bell for the phone that ignores the first 7 rings and then rings. I learnt that those people that want to sell something ring 5 or 6 rings.10 local duct cleaning companies have been fined for soliciting business on the phone. The companies thought they would not be fined because they did not make the phone calls that were from the other side of the world.
The other way is to ask the salesman for his home phone and when he answer that he doesn't like people calling him at home, you tell him: "now you understand how I feel!"T
Next time a seller calls you, interrupt him/her as much as you can while trying to sell them your own product (of imagination). They usually hang up quite quickly when they realize what your saying and after a couple of calls they stop bother with that nut job or whatever they might be thinking about you, why not sell them the same product only "better"
But seriously, its a good way of making them stop calling you.
I guess you want to correct this one.A series resistor and a capacitor to ground pass high frequencies and reduce low frequencies.
Maybe you get the same person using different high-pass filter.The problem with the sellers that phone me from the other side of the world is that there are thousands of them in each call center and there are many call centers. I never get the same person again.
I guess you want to correct this one.
My statement: "A series resistor and a capacitor to ground pass high frequencies and reduce low frequencies."
OOps, I got it backwards. A highpass filter uses a series capacitor feeding a resistor to ground.
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