Why do transformers hum? (Especially sub-station transformers...)?
137848
Transformer cores are made of several laminations of magnetic steel.These laminations are stacked together and bound tightly on a frame.Transformers work on the principle of electromagnetic induction.The magnetic flux passing through the transformer core acts on the laminations and cause them to vibrate.This results in a humming sound.\nUnusually high humming sound could be due to looseness of the binding of these laminations.
394866
Transformers are a cartoon show and movie!!! they arn't real, same deal with Mechs ; ;\n\n\naww i can't answer the same thing twice... but yeah\n\na 'real transformer' tho? as opposed to those virtual/imignary ones?\n\nbut i'm goign to assume electrical transformers your talking about...\n\nfirst, resistance in the wires, converts some of the energy to heat, and the magnetic feild aroudn the wires, which is what is used to transform the voltage/amperage radiate elsewhere some in the design.\n\nTesla made some kick-ass transformers
637835
you need an x-14 reynolds conductor. If you can't find one, cover your head with aluminum foil and put headphones on, listen to John philips Sousa march music..this will keep the voices at bay
1164919
you need to describe what you mean by "small" better.\nis it too small vertically, horizontally, or both?\nAlso, how good is your electronics background?\nDo you know how to discharge the CRT and large capacitors so you don't get zapped with 330 to 10,000 volts while attempting to repair it?\nYou also need to define "wavy" better.\nWith the tin amount of information you have given though, it sounds like the power supply is failing, but in which part is impossible to say.
391194
I'm assuming you talking about CAT5 or twisted pair cabling. When current runs down a wire a magnetic field is formed introducing noise into the line. By twisting the pairs the magnetic field is interupted and therefore canceling the noise.
507439
a sub has a crossover that only lets lows go to the sub(bass only)   ,while your mids and highs go to the other speaker.for a much clearer crisp sound.  .....and that sue nami guy dont now what hes talkin about!
278005
The frequency is limited to the rotational speed of the generator.  A 2-pole 60Hz generator spins at 3600rpm, 4-pole at 1800rpm etc. 2-pole 50Hz at 3000rpm.\n\nIf the frequency is too low it won't drive the downstream transformers, too high and the impedance losses become unacceptably high.
745702
its called "feedback", distance your microphone fom your speakers.\n"should solve the problem".
532156
ur ques is incomplete. in a microphone it gets converted to electrical energy
505679
Not a real problem if you don't dig too deep. Quiet often, back in the days when I repaired speakers, the connection from the voice coil to the speaker contact wires would break from vibration. Un-winding just enough of the wire (coil) to re-do the connection saved many an expensive speaker.
523814
Visually check the bearings. commutator, and brushes. All of these could be sources of noise and poor performance. Also, all poles of the commutator should read relatively low ohms (the larger the genereator, the lower the reading) from the + to - poles, and should read infinite (open) to the case of the genertator (ground) unless, of course, one pole is grounded.
222925
Dig here:\nhttp://www.scientifics.com/transformers.htm
298046
I plugged my computer into an old stereo system and now the walls vibrate. I have to lock the door to keep my wife from killing me when I crank up Ozzie and Crazy Train. It's not your sound card, I have a standard card in my puter. You need an amplifier and better speakers, both are costly. Best Buy will have a system for around two hundred dollars. A word of advice; get it anyway you can, it is just so much more fun!!!
1013797
This happens to me. It is a radio frequency issue. Ususally if you have some kind of wireless device near your computer, the radio frequency interferes. For me, it is my cell phone near my speakers. I always know when my cell phone is going to ring, because my computer speakers make that same strange buzzing noise before hand. I think this problem is primarily systematic with cheap $20 COMPUSA speakers.
697947
when it makes that noise your putting too much voltage thru a capasitor if you do it long enough it will explode you probably have bulged caps
643634
Replace the jacks.  These things are not all that expensive.\n\nThe real question is why are the jacks there in the first place.
222766
It is magnetic coupling between two circuits