Home |
Search |
Today's Posts |
#1
|
|||
|
|||
Can you explain this 50Hz hum??
This is so annoying. The only thing I have on are the computer and mixer
(and hence the power transformer I use here in Germany for my US gear). The mixer's first two channel inserts are connected to delta1010 ins1/2. There are two mics coming into those channels, but even with the mic cables unplugged and trim all the way down, the delta monitor shows the following: www.guitar-dreams.com/misc/delta1010problem1.jpg If I unplug the inserts it goes away. The recorded audio is http://www.guitar-dreams.com/misc/de...0waveform1.mp3 The spectrum analysis shows http://www.guitar-dreams.com/misc/de...0waveform1.jpg So, if I take the unplugged insert and touch it against any jack on the mixer, the input level on the delta then rises back to the level shown in the picture above (first one). I then touched it against one of the screws that is holding the delta on my rack and suddenly both delta ins 1/2 input levels dropped down. Not completely though. There is still a waveform there http://www.guitar-dreams.com/misc/de...0waveform2.mp3 with a similar specal analysis http://www.guitar-dreams.com/misc/de...0waveform2.jpg Any idea what is going on here? In both cases, the spectral peaks are at 50Hz which of course is no coincidence. I would be tempted to think it has something to do with the step down transformer I am using on my US gear. But in this apartment, if I turn on a stereo, I hear 50Hz coming through the speakers regardless of the transformer. I feel like I am just doomed in this apartment. I hear 50Hz everywhere. The fridge, etc,etc. |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Explain me this | Audio Opinions | |||
TS/TRS balanced/unbalanced can someone explain | General | |||
60 hz cassette deck on 50hz power? | General | |||
60 hz cassette deck on 50hz power? | General | |||
Reverb & EQ and "damping" etc .. please explain .. | Pro Audio |