c. Twist the positive and negative wires from the output of the power supply to
the radio
d. The DC side positive and negative outputs of these power supplies are iso-
lated from the chassis. As explained at paragraph 5 above, the noise currents
are filtered to the chassis ground and the chassis ground is connected to the
earth ground through the earth ground pin of the AC power outlet receptacle.
Avoid connecting (referencing) the DC negative output terminal of the power
supply to the earth ground.
e. Connect a 1/4” wave length of wire on the negative terminal of the power sup-
ply. Connect one end of the wire to the negative terminal and leave the other
end free. The wave length corresponds to the wave length of the interfering
frequency. (May not be practical for long wave lengths)
[ Formula: Wave length (Meters) = 300 / frequency in MHz
15.
