SB-058 TR-2400 Tone Encoder RFI 12-14-79 In some cases, users may report RF interference, or motor-boating, when using a tone encoder in their TR-2400. A secondary complaint of excessive tone level may also be encountered. 1. For RFI, bypass the B+ terminal to ground with a 100 uf cap. 2. For excessive tone input to the TR-2400, install a 100 K ohm resistor between the encoder and the TR-2400 Tone input terminal. JEB/yn (c) 121479TKC