inverter review?
Just saw a few Schumacher inverters at Wal-Mart, also online, those reviews were 4 star or better. Anyone here ever use one? My plan (for now) is to use a 400 watt with a transfer switch to run a sma...
Forum Discussion
MSW. depending on who you talk to is either Modified Sine Wave or Modified Square wave.
Fact: On many farms there is a set of steps that go up one side of a fence and down the other, The 4-legged animals can not climb out but the Humans can easily climb over the fence on the steps.. Continued later.
The steps form the very same pattern as 1/2 of the Modified square wave (the positive half) the negative half is of course a mirror image.
Continuining: This steps are Called a Stile.
Now the name Stile also applies to a pile of horse dung.
So if you feel I think the Modified Sine/Square wave stinks.. Well, there's proof.
Square waves, modified or not, contain harmonics, In fact it contains not only the 60 HZ (and the 120 or 180 "Step" frequency) but odd harmonics all the way up well into the microwave range So it will interfere with many Television, Radio and even audio hardware.
now proper sheilding and filtering can reduce and contain those harmonics, but not all MSW iverters are properly filtered and shielded and Far too many Televisions, Radios and Audio Amps are poorly filtered. So you get Hum, Buzz or 'Hum bars' or even failure to lock on and decode digital signals.
It also sounds like a buzz saw on my radios. (Very sensitive Ham Gear)
Think about this, I have yet to find an AM broadcast station under 1,000 watts, Most are multiples of that.
Hams, are licensed for a maximum of 1,000 DC input or 2,000 Peak Envelope Power (Depending on mode and which is LOWER) and many of us run only 100 PEP (roughly 50 watts DC) And this AM I was sitting here in S.E. Ga chatting with hams all over the eastern US, From Flordia to the Ohio Valley (Strong signals) and many other places with weaker signals.. All running less than an AM broadcast station, 3.9MHZ band. (AM is 1MHZ band) and if I switch to Digital (Same radio and antenna) I can type with hams all over the globe. So how senistive must my radio be?
Fact: On many farms there is a set of steps that go up one side of a fence and down the other, The 4-legged animals can not climb out but the Humans can easily climb over the fence on the steps.. Continued later.
The steps form the very same pattern as 1/2 of the Modified square wave (the positive half) the negative half is of course a mirror image.
Continuining: This steps are Called a Stile.
Now the name Stile also applies to a pile of horse dung.
So if you feel I think the Modified Sine/Square wave stinks.. Well, there's proof.
Square waves, modified or not, contain harmonics, In fact it contains not only the 60 HZ (and the 120 or 180 "Step" frequency) but odd harmonics all the way up well into the microwave range So it will interfere with many Television, Radio and even audio hardware.
now proper sheilding and filtering can reduce and contain those harmonics, but not all MSW iverters are properly filtered and shielded and Far too many Televisions, Radios and Audio Amps are poorly filtered. So you get Hum, Buzz or 'Hum bars' or even failure to lock on and decode digital signals.
It also sounds like a buzz saw on my radios. (Very sensitive Ham Gear)
Think about this, I have yet to find an AM broadcast station under 1,000 watts, Most are multiples of that.
Hams, are licensed for a maximum of 1,000 DC input or 2,000 Peak Envelope Power (Depending on mode and which is LOWER) and many of us run only 100 PEP (roughly 50 watts DC) And this AM I was sitting here in S.E. Ga chatting with hams all over the eastern US, From Flordia to the Ohio Valley (Strong signals) and many other places with weaker signals.. All running less than an AM broadcast station, 3.9MHZ band. (AM is 1MHZ band) and if I switch to Digital (Same radio and antenna) I can type with hams all over the globe. So how senistive must my radio be?
