Noise Filters. The interference or electronic noise generated by alternators ignition systems motors etc. can render a vehicle or vessels radio or other electronic equipment virtually useless. This interference takes the form of popping or static on radios or audio gear and garbled images or hash on video displays. These specialized filters can be used singly or in combination to attenuate conducted line noise either at the affected equipment or at the noise source. Filtered Frequencies . Model 150A: 70 kHz - 100 MHz . Models PC-10 and PC-25: Audio - 200 MHz Filter Features: . Heavy duty aluminum construction . Operate on 6-48 VDC systems . Integral mounting flanges for secure installation . Brass stud connectors on alternator filters accommodate high current cables and terminals . Color coded wire leads on all other models make in-line installation easy Model Rating Installation. Location Size Weight H W D 150-A 150 Amp In the alternator output lead 3.25 5.75 3.25 3 lbs. (8.2 14.6 8.2cm 1.4Kg.) PC-10 10 Amp In the + and - power leads close to affected equipment 1.25 4.25 3 1 lb. (3.2 10.8 8.2cm .5Kg.) PC-25 25 Amp Same as PC-10 2 4.25 3.25 2 lbs. (5.1 10.8 8.2cm .9 Kg.)