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rock95seven

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@rock95seven

Active 8 months, 1 week ago
Just dropping by to say Hello and that I am getting back into the part 15 arena to take another shot at broadcasting after a long 2 1/2 year break. Hope all is well with everyone. Happy Broadcasting View
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Why do Humming Birds hum?

Posted on December 13, 2011

Because they don’t know the words…..

Yeah that was a terrible joke I know, you know what else is terrible?? Hum on an otherwise clean sounding AM CC signal. I am trying to find the cause.

Because they don’t know the words…..

Yeah that was a terrible joke I know, you know what else is terrible?? Hum on an otherwise clean sounding AM CC signal. I am trying to find the cause.

What i have tried so far: replaced the jumper behind the L + R audio inputs that bypasses grounding through the power supply, tried a different audio cord and different inductor settings.

I was able to reduce the hum but not eliminate it.
The next thing to try i guess is the double extension cords RFB mentioned.
We do not have an extra 220 v outlet here otherwise i would try what Radio8z mentioned. The only 220v lines here are the water heater,stove and clothes dryer.

And i just thought about this, perhaps i should try a different music source as well, since the computer i use for automation is on the same line as the extension cord but on separate outlets.

Signal strength?? Sounds strong here in the house but i have not had a chance to try it outside away from the house. Maybe tomorrow.

Continued from http://www.part15.us/node/3186

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