Labels:lodestone | reckoner | sky OCR: KENWOOD ASB-1021 Service Bulletin Amateur Radio Divislon Subiect TS 950 Smoke from Antenna Tuner Unit Date: May 14 1993 Sympi tom: When tuning into an antenna with high SWR the SWR meter reading becomes unstable and small amount of smoke is seen coming from the antenna tuner Cause: One of the 3x4 self tapping screws that is used to secure the AT Unit hinge can occasionally damage the insulation on the lead wire When the tuner is then loaded into high SWR the high reflected voltage causes the lead to heat up which further damages the insulation Eventually the insulation breaks down completely and the wire shorts to the screw causing the lead to overheat and smoke to emanate from the area Corrective Action: Cut 12 cm tong piece of the fiberglass insulating sleeve and install it over the brow ...
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