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Re: Mini lathe 7 x12 14 8 shop drill press mill wood working sextant clocks gear milling equipment engine tractor rebuilding repair Mini lathe 7 x12 14 8 shop drill press mill wood working sextant clocks gear milling equipment engine tractor rebuilding repair Mini lathe 7 x12 14 8 shop drill press mill wood working sextant clocks gear milling equipment engine tractor rebuilding repair Mini lathe 7 x12 14 8 shop drill press mill wood working sextant clocks gear milling equipment engine tractor rebuil

 

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Switch Mode Power Supplies have at minimum 20 mS hold-up.? In reality they have more, but not necessarily a lot more.

I built a factory control system for the DOE way back when and used an unregulated "Ugly" brand power supply for the 24V.? BIG transformer, BIGGER capacitors.? Worked great.? Cheap (for the time).

Upper right corner of left enclosure


Me working on version 2.? I said it was way back in time, there are dinosaurs outside!





On 10-Feb-25 20:44, Bill in OKC too via groups.io wrote:

In 1986 I was attending an Army Satellite terminal training class? at Ft. Gordon, GA. Had a bad storm that night that shut down our terminal. I'd been writing a letter on the Heathkit. H89 computer when I left for class. Expected it to be shut down when I got back to the dorm. Nope! The filter caps in that power supply were the size of my fists. It was only a transient power hit, but it took down the relatively modern MILSPEC satellite terminal, and didn't touch the monstrous linear old-school linear power supply.?

Bill in OKC?

William R. Meyers, MSgt, USAF(Ret.)


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