Maybe so. But this is an old design. > On Jul 1, 2021, at 04:50, David Woolley <for...@david-woolley.me.uk> wrote: > > I don't think this design would be acceptable in modern consumer equipment, > at least not in Europe. Typically they would have an auxiliary power supply > for the microcontroller, to reduce power consumption to well under 1 watt, > and maintain a reasonably good power factor, when in a soft power off state. > > Current and voltage figures quoted elsewhere in the thread suggest over 10 > watts and an unknown number of VA. There was a lot of campaigning to hard > power off devices at a time when standby powers were more like 5 watts. > > On 01/07/2021 00:09, Jack Brindle wrote: > >> It is powered by the 5V linear regulator, which is providing the heat you >> feel, along with the +12V and -12V regulators (also linear). I seem to >> recall that the input to the regulator is something like +15 or +18V, which >> gets regulated down to the three supplies that are used for running the >> microcontroller the RS-232 interfaces and the LCD. The LCD is disabled when >> front-power is off. > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to haljr.mas...@gmail.com
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