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I happened upon an old Philmore FSM55 meter from the 80's?? Have the unit and box but no manual. Searched online but cannot locate a PDF or anything referring to the manual. Wondering if anyone on here knows about it or location of the documents I'm looking for. The power meter reads exactly correct as does the modulation. I can't figure out how to calibrate and use the SWR function however. Box says 1.5-150 MHZ. I be stumped.:confused1: