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 Re: Sine of the Times Richard Deeming4-Jun-20 7:59 Richard Deeming 4-Jun-20 7:59
 Re: Sine of the Times Marc Clifton4-Jun-20 8:57 Marc Clifton 4-Jun-20 8:57
 Re: Sine of the Times Richard Andrew x644-Jun-20 10:17 Richard Andrew x64 4-Jun-20 10:17
 Re: Sine of the Times OriginalGriff4-Jun-20 9:03 OriginalGriff 4-Jun-20 9:03
 Re: Sine of the Times Richard Andrew x644-Jun-20 10:18 Richard Andrew x64 4-Jun-20 10:18
 Re: Sine of the Times OriginalGriff4-Jun-20 11:09 OriginalGriff 4-Jun-20 11:09
 Re: Sine of the Times obermd5-Jun-20 3:24 obermd 5-Jun-20 3:24
 Re: Sine of the Times Jörgen Andersson4-Jun-20 9:53 Jörgen Andersson 4-Jun-20 9:53
 A cheap inverter produce a square wave instead of a sine wave. There are two problems with that. A. A square wave produces harmonics really high up in frequency which, if badly filtered, can produce a high amount of interference with sensitive electronics. This can have very strange consequences. 2. In most switched power supplies, the input is first rectified and filtered through a capacitor to create a direct current To produce the same power through a resistive load, the peak voltage of a sine wave is sqrt(2) higher than the peak voltage of a square wave. this means the voltage of the rectified direct current is 0.707 lower than the voltage from a square wave. So for a switched power supply to create the same output voltage from a square wave as from a sine wave it uses 1.414 times higher current. This is one reason brownouts break a lot of electric equipment. So, I would take a good look at the power supply for how LOW voltage it accepts, if that is less than 0.707 of the nominal voltage of the inverter you don't need to worry to much I think, since switched power supplies are not very sensitive to higher harmonics. Then there are some intermediate priced inverters producing something called modified sine wave, which is looking similar to a truncated triangle wave. Wrong is evil and must be defeated. - Jeff Ello
 Re: Sine of the Times Richard Andrew x644-Jun-20 10:23 Richard Andrew x64 4-Jun-20 10:23
 Re: Sine of the Times Jörgen Andersson4-Jun-20 10:40 Jörgen Andersson 4-Jun-20 10:40
 Re: Sine of the Times Richard Andrew x644-Jun-20 12:39 Richard Andrew x64 4-Jun-20 12:39
 Slides, photography from the 50's??? glennPattonContracting24-Jun-20 5:39 glennPattonContracting2 4-Jun-20 5:39
 Re: Slides, photography from the 50's??? PIEBALDconsult4-Jun-20 5:46 PIEBALDconsult 4-Jun-20 5:46
 Re: Slides, photography from the 50's??? W∴ Balboos, GHB4-Jun-20 6:06 W∴ Balboos, GHB 4-Jun-20 6:06
 Re: Slides, photography from the 50's??? glennPattonContracting24-Jun-20 6:54 glennPattonContracting2 4-Jun-20 6:54
 Re: Slides, photography from the 50's??? Mike Hankey4-Jun-20 6:17 Mike Hankey 4-Jun-20 6:17
 Re: Slides, photography from the 50's??? OriginalGriff4-Jun-20 6:32 OriginalGriff 4-Jun-20 6:32
 Re: Slides, photography from the 50's??? glennPattonContracting24-Jun-20 6:56 glennPattonContracting2 4-Jun-20 6:56
 Re: Slides, photography from the 50's??? Member 79891224-Jun-20 7:39 Member 7989122 4-Jun-20 7:39
 Re: Slides, photography from the 50's??? Gary R. Wheeler4-Jun-20 13:11 Gary R. Wheeler 4-Jun-20 13:11
 Re: Slides, photography from the 50's??? Member 79891224-Jun-20 7:37 Member 7989122 4-Jun-20 7:37
 Re: Slides, photography from the 50's??? Peltier Cooler5-Jun-20 4:02 Peltier Cooler 5-Jun-20 4:02
 Re: Slides, photography from the 50's??? Rick York4-Jun-20 9:12 Rick York 4-Jun-20 9:12
 Re: Slides, photography from the 50's??? Member 79891224-Jun-20 6:33 Member 7989122 4-Jun-20 6:33
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