{"product_id":"universal-tympanium-12volt-ac-inline-regulator-made-in-usa","title":"**UNIVERSAL** 12 VOLT AC INLINE REGULATOR  (BULB SAVER, Clipper diode, or Zenner Diode)","description":"\u003cp\u003e\u003cstrong\u003e**UNIVERSAL** 12 VOLT AC IN-LINE REGULATOR (Bulb Saver)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e12V AC Inline Shunt Regulator. This is just a simple AC shunt regulator for a NO battery 12 volt system.  This handy in-line 12V AC Shunt Voltage Regulator (Clipper diode or Zenner Diode) will keep the voltage to a consistent 12 volts AC. This will keep bulbs from burning out, saving you thousands of dollars.  It can also be used to replace the original 3-terminal regulator #161639 found on European Vespa PX that does not have electric start, many far-east restoration and used with non-battery Vespa conversions with single output AC stator and WIREKIT-1 simplified wiring.  We also offer a larger version of this 12 volt AC shunt regulator, see part #161639-AM\u003c\/p\u003e\n\u003cp\u003eFunctions of the terminals on this voltage regulator are:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBoth 1 and 2 terminals are the AC shunt regulation for lighting.  They are internally connected, 1 can go to your lighting coil and 2 can be your output to your bulbs.  They function the same as the original Vespa regulator “G” terminal.\u003c\/li\u003e\n\u003cli\u003eTerminal 3 is Ground terminal that typically ties to a black wire and will have continuity to the mounting tab of this regulator, scooter frame and engine cases.  This must have a good and clean ground in order to function correctly and clip or shunt the AC input power to no more than 14 volts AC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eConnectors or instructions are NOT included. Electric items have no warranty and are NOT returnable. \u003c\/strong\u003e\u003c\/p\u003e","brand":"Scooterwest","offers":[{"title":"Default Title","offer_id":52436000309537,"sku":"REG12VAC","price":29.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0950\/4817\/1809\/files\/reg12vac-regulator-12-volt-bulb-saver-3.jpg?v=1781817248","url":"https:\/\/scooterwest.com\/products\/universal-tympanium-12volt-ac-inline-regulator-made-in-usa","provider":"Scooterwest","version":"1.0","type":"link"}