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OCR: KENWOOD ASB- -1036 Service Bulletin Amateur Radio Division Subject: TS-450S Parts Change Date: December 8 1993 The 2SC2509 driver transistors are no longer available They have been discontinued by the manufacturer substitute transistor 2SC3 133is available but requires some minor circuit changes These changes are detailed below Parts Required: Qty Description Kenwood Part No Circult Description Driver Transistor 2SC3133 330 1W Carbon resistors RC05GF2H331J R8 R9 .047 U Ceramio capacitor C91 -0119-05 220 OF Ceramic capacitor CC45SL2H221J C64 C65 560 DF Ceramic capacitor CC45SL 2H561J C63 Note C64 and C65 should be soldered directly to the collector and emitter pins of the final transistors Q4 and Q5 Change Chanpe 0.047 2200 HF Final Unit (X45 -3400 -XX) Time required for this modification 6 ...