noise/interference

[catpuke]

I have an spc-10 large diaphragm mic into a tube mp studio preamp into the e-mu 1212 (using cakewalk proaudio8 to record and mix)

almost all of the time there's a very loud hum, much too loud to be able to record

sometimes the hum includes what appears to be people talking on a radio or tv

it's only when the mic is on, when i disconnect the mic, the sound is clear

i've turned off all electrical devices in my house, but with no effect

could it be electrical interference with a neighbor's electronics? (i live in a city)

is there anything that can be done about it?

thanks for any help
Matt

 

[TexRoadkill]

Try using a higher quality mic cable.

 

[catpuke]

I did buy another, both are low noise balanced microphone cables

 

[Farview]

There might be something wrong with the preamp, or the mic. It is a ground problem. Does the tube mp have a wall wart or a normal AC cord. is it plugged into the same outlet as the computer? It really sounds like the shield has been lifted.

 

[catpuke]

the mic and the tube mp preamp are both brand new

the preamp was plugged into the same power strip as the pc--i plugged it into a different outlet, but no effect

 

[Farview]

Just because they are brand new doesn't mean anything. I had an ART tube compressor that I had to get fixed right out of the box.