I call it a modified square wave... Perverse marketing types... On Mon, May 3, 2021 at 5:24 PM TomasK <[email protected]> wrote:
> On Mon, 2021-05-03 at 17:00 -0500, Chuck Hast wrote: > > I have used the true sine wave version that is about 1000 VA > > to keep medical gear alive, Costco carries them some places > > in store but also on line. > > > > I try to go sine wave, the power co's have really gotten trashy > > with the power now since appears that they no longer worry > > about keeping clocks and other gear disciplined. > > > > The newer switching power supplies do NOT like the modified > > sine wave (lie lie... really modified SQUARE wave) that comes > > out of the non-sine wave boxen. I have lost a lot of lab gear in > > hospital labs because biomed insist on using modified sine > > wave rather than pure sine wave, have one hospital where I > > have had to replace 3 tissue processors due to that. It cost them > > but finally someone listened and replaced the stinking UPS with > > a real one that generated sine wave power.... > > What kind of person calls this modified sine wave: > > +--+ +--+ +--+ > | | | | | | > _ ____| |____ ____| |____ ____| |____ > | | | | | | > | | | | | | > +--+ +--+ +--+ > > as suppose to square wave: > > +-------+ +-------+ +-------+ > | | | | | | > ------+ +-------+ +-------+ +-------+ > > blows my mind - no wonder switching power supplies do not like and > overheat in the best case. > > -T > > _______________________________________________ > PLUG: https://pdxlinux.org > PLUG mailing list > [email protected] > http://lists.pdxlinux.org/mailman/listinfo/plug > -- Chuck Hast -- KP4DJT -- I can do all things through Christ which strengtheneth me. Ph 4:13 KJV Todo lo puedo en Cristo que me fortalece. Fil 4:13 RVR1960 _______________________________________________ PLUG: https://pdxlinux.org PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
