PLT OF A BEECH BE36 LANDED GEAR UP AFTER ATTEMPTING TO LOWER THE LNDG GEAR VIA THE EMER MANUAL PROC DUE TO AN EARLIER INFLT ELECTRICAL ALTERNATOR SYS LOST.

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ENRTE FROM PTK TO CVX AT 6500 FT MSL; I NOTICED ALTERNATOR LOAD AT '0.' I WAS APPROX 25 NM N OF MBS. ALL ELECTRICAL EQUIP WAS SHUT DOWN EXCEPT #1 COM AND XPONDER. I INFORMED ZMP OF MY PROB AND HEADED TOWARDS HTL. I ATTEMPTED MULTIPLE ALTERNATOR RESETS AS PER EMER CHKLIST WITH NO RESULT. I WAS APPROX 10 MI E OF HTL AND ATTEMPTED TO DROP THE LNDG GEAR. THE GEAR APPEARED TO COME ABOUT HALF WAY DOWN FOLLOWED BY TOTAL ELECTRICAL LOSS. I CIRCLED HTL FOR APPROX 20 MINS WHILE ATTEMPTING TO LOWER GEAR MANUALLY AS PER EMER CHKLIST. I INSTRUCTED MY R SEAT PAX TO CLB INTO BACK SEAT AND OPERATE THE GEAR CRANK. I COULD NOT VERIFY GEAR POS BY SIGHT OR BY LIGHT INDICATORS (DUE TO NO RESIDUAL ELECTRICITY). THE GEAR HANDLE APPEARED TO BE AT THE END OF ITS TRAVEL. AFTER SECURING ALL PAX I ENTERED A NORMAL PATTERN FOR RWY 27 (HTL) AND BEGAN A NO FLAPS APCH LNDG. I LANDED ON THE CTRLINE WITH THE PLANE ON ITS BELLY. THE LNDG WAS SMOOTH AND THE PLANE SKIDDED SLIGHTLY TO THE L OF CTRLINE. SMALL AMOUNT OF SMOKE WAS NOTED FROM UNDER THE FRONT OF FUSELAGE AND THE AIRPLANE WAS EVACED. CONTRIBUTING/CAUSAL FACTORS: ALTERNATOR FAILURE; NOT HAVING PRACTICED GEAR LOWERING PROCS WITH THE GEAR HALF WAY DOWN (ALL MY PRACTICE STARTED WITH THE GEAR IN THE FULL UP POS). TO PREVENT RECURRENCE: HAVE STAND BY/BACK UP GENERATOR/ALTERNATOR. ALWAYS CARRY HAND HELD BACK UP COM RADIO. MECHANICAL GEAR INDICATOR OR WING MOUNTED MIRROR SYS. PRACTICE GEAR EXTENSION PROC FROM GEAR UP AS WELL AS GEAR HALF WAY DOWN POS.