Model: IC-12AT Bulletin: B3010 Subject: Improve the stability of the CTCSS tone in transmit Affected S/N's Less Than 4101 1. Remove and replace the following components: Component Old Component New Identifier Value Location Value C383 470 pf PLL Board Remove this part R369 39K PLL Board 22K R370 2.2K PLL Board 2.7K C102 .0027 mf Main Board .0018 mf 50 V y