Question about Behringer Eurorack Ub802 - Ultra Low-Noise Design 8-Input 2-Bus Mixer
I have my ub802 hooked to a cb radio on transmiting i am getting white noise .can you help me?.
It can be a number of things.
Bad ground, excess gain, excess number of mixer channels with no inputs, Make sure the mixer inputs you are going to use are the only ones that are up. Power supply noise- flourescent lighting noise, Clamp on ferrites on the power cords of everything can help reduce this. You can sometimes track the offending source with a battery powered AM/MW radio.
It can also be caused by going from a balanced output to an unbalanced input with some impedance differences.
Posted on Feb 07, 2012
The output of the UB802 is what is called active-balanced bridging into 10K. You're running it into some odd impedance unbalanced microphone input. Use a small 600-10k ohm transformer (Jameco Electronics) at the input of the CB, or order an inline XLR transformer from Shure, plus a 30-40dB Pad. Run the output of the UB802 at line level, and attenuate it just before it hits the microphone input through your custom cable. You could also eliminate the mic pre-amp in the transceiver if you were adventurous... mic pre-amps around RF, unless properly grounded, can be troublesome. And yes... invest in a pile of ferrite cores too to keep induced RF out of the mic circuit.
Posted on May 21, 2015
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Posted on Jan 02, 2017
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