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What happens to a 220v 50hz stereo amplifier when connected to a 220v 60hz supply?

Nothing happens. The stereo has a transformer that converts the power to DC, and 50 or 60 Hz input makes no difference.


Do Indian electrical devices work in US?

No India uses 240V at 50Hz the U.S. uses 110V at 60Hz.


How do you tune a hammond h112 organ?

The Hammond H112 is a tonewheel organ and the frequency of each note is governed entirely by the speed of the motor which drives the tonewheel generator. By default these motors are designed to operate from 60Hz AC power (US standard) therefore if you run it from UK 50Hz (even with a voltage converter) the whole thing will run slow and therefore every note will be a lower frequency. You can get converters to change the 50Hz UK standard to 60Hz US which should solve any problems. If the motor is still not running at the proper speed I'm guessing that the whole thing is clogged up or, very likely, hasn't been properly oiled for some time. There is no way to actually `tune' a tonewheel Hammond.


Why is my Guitar Amp Humming?

This is normal on guitar amplifiers because of the very small signal from the guitar pickup one will need a high gain pre amplifier to boost the signal to drive te main amplifier, if you touch the tip of the phone plug you are actually feeding a 50Hz or 60Hz signal that is picket up by your body that act as an antenne for the magnetic fields from the 50 or 60Hz mains, that is then amplified by the preamp to a large enough signal to drive the main amp. Also: In terms of electromagnetic fields, the human body is oddly noisy. The hum you get from most single coils is actually from the player, this is why touching the strings (they are metal and connected to the bridge piece which is grounded) can make the hum go away. This is part of it.


Why would you prefer a flat 100Hz TV over an older version?

A 100Hz TV has a faster refresh rate than e.g. a 60Hz or 50Hz. This means that the picture is updated more frequently and is therefore clearer. "a flat 100Hz": There are 2 types of "flat" TV's. One is the flat panel TV (e.g. an LCD or plasma) and it's only about 4-6" thick. The obvious advantage of that kind of TV is that you don't need a "place" for it, you can just hang it on your wall. The other kind is a normal TV, but with a flat screen. The advantage of a flat screen is that there is less chance of surrounding light interfering with the picture, i.e. the only light that is reflected off the screen is the light positioned directly in front of the TV. Now it's up to you to decide if the advantages are sufficient to invest in a new TV.