SB-036 TS-180S DFC Hum with PS-30 7-10-79 Some TS-180S users may report erratic DFC and audio hum. You will find they have placed the PS-30 to the left of the transceiver. Hum is induced from the PS-30 into the DFC. We are awaiting modification and production changes. Meanwhile, please be aware of this problem. Temporarily moving the PS-30 to the right hand side of the transceiver will cure the problem. Spacing the two units with the SP-180, or just seperating at least two inches will also cure the hum. When full information is available, we will follow up. Please advise you service ans sales personal. JEB/yn (c) 71079TKC