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On 7 Aug 2002, at 11:05, Mark Healey wrote: > One thing I've never been able to find out about car radios is whether > the swithced 12V is the main operating voltage and the constant > 12V is just a trickle to hold the presets or if the constant 12V is > the operating voltage and the switched 12V is just a control signal. The constant source supplies the clock and the preset memorys. The switched source supplies the radio power. - ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ------------------------------------------------ To unsubscribe, E-mail to: <type3-off@vwtype3.org> For more help, see http://vwtype3.org/list/