Kenwood TS-950S (TS 950 S TS950S) mods reviews software and diagrams

Cause:
Switching noise from the noise-blanker gate enters the AF amplifier via the +15 V line causing the noise.

Parts required:

Qty   Description                          Kenwood Part No.     Circuit description
 1    100 µF, 16 V electrolytic capacitor  CE04KW1C101M         NA
 1    120 ohm resistor                     RD14BB2B121J         NA

Procedure:

1. Cut the pattern of the 15 V line on the IF unit (X48-3060-00) component side, near Q34's emitter and add the 120 ohm resistor as shown in the accompanying diagram.
   
   
2. Add the electrolytic capacitor as shown in the diagram. Quickly solder the negative lead to the metal shield of L28.

Time required for this modification is 15 minutes or less.