Modification

Reducing RF interference when too close to a radio station tower, or other source emitting RF noise.

Difficulty Level

4 – Moderate/Hard – internal connection or component addition.

Components Required

1. Choke coil: 180 µH inductance.
2. Capacitors:
   • 0.01 µfd, 25V
   • 0.02 µfd, 25V
3. AC plug adaptor: 3-prong to 2-prong type.

Instructions

1. Install the 3-prong to 2-prong adaptor on PS-12C power supply.
2. Install choke coil and capacitors as shown on schematic diagram.
3. Cut the circuit as illustrated on the schematic diagram.
4. If the RF interference is not reduced to an acceptable level, shielded cable will need to be installed to further reduce the interference. Depending on the severity of the interference, the above suggestions may or may not eliminate the interference.

LEF-3

LEF-5/10/10S