SB-816 TS-120S Band PAss Filter Change 2-7-80 For complaints of out of band interference, especially BCI, the BPF (Bandpass filter) terminating resistors may be changed for an improvement of approximately 10dB. On the RF unit X$$-1260-01 change R3,5,7,9,11 from 1.5K ohm to 470 ohm. No adjustments are required. JEB/yn (c) 2780TKC