TH215.5 Here is another one you might need for the database Ross. 73's Jim KD3O @ KD3O.MD.USA.NOAM PERMISSION GRANTED FOR RELAY AS INDICATED IN THE READ.ME FILE ON THE KENWOOD BBS. SB-920 TH-205/215 Protection Fuse Replacement 7-22-87 When a plug other than the PG-2V or PG-3C is inserted into the DC IN jack, the ground side of the jack may not disconnect. This may cause the external DC power to be supplied directly to the internal battery which results in overheating the battery and blowing the fuse. To protect the battery, replace the fuse with a protection diode, part number ERB83-004. Note models with serial numbers greater than 801XXXX allready incorporate this diode as D16. This modification may be performed under warranty. Time required for this change is 1/2 hour or less. (c) 121589TKC