[Kenwood] TS950SDX: 50z hum on the audio

[Peter Ravn]

When the volume control on my TS950SDX is turned fully counterclockwise, there is an annoying low level 50 hertz hum in my earphones. When the volume is turned up on receive, the hum disappears into audio noise. If this was the only problem, it was not woth bothering about. The trouble is, however, that the hum is constantly to be heard while monitoring my own signal, using my earphones.

Inspection has proved that the following measure suggested by Jeff King, ZL4AI, on this Kenwood 950SDX page ( http://homepages.ihug.co.nz/~jaking/TS-950sdx.htm#_Toc193948223 ), has alread been done. "Permanently removed 109-2-GND  form SW A  J/10 Connector 109. Soldered a 0.01uF disc ceramic capacitor to wire and another pi connector and pushed this into Connector 109-2-GND. The otther capacitor wire went to the removed  109-2-GND  metal female socket. This was covered with insulation tape."

So what else can be done?

73 de Peter / OZ8CTH