Model: IC-761 Bulletin: B2503 Subject: Speed up rise time of CW transmit waveform when the radio is in the full-break-in mode 1. Remove the bottom cover from the radio. 2. Remove the main board from the radio. 3. Replace R32 (currently 180K) with a 82K 1/8 watt resistor (ICOM P/N 915-01123).