standard inverter converter to pure sine wave

[normspanners]

http://www.ebay.co.uk/itm/252428319300?_trksid=p2055119.m1438.l2649&ssPageName=STRK:MEBIDX:IT

anybody tried one ? thoughts on them?
could maybe have it switching in/out if needed.

 

[Omniata]

Creates +ve sine wave?, poor description, foreign junk IMHO.

 

[Robotstar5]

This is the right forum for it as the instructions state you need to weld the components to the PCB

 

[rtbcomp]

"Notice: This is a DIY Kit , buyers need to weld the component by yourself !" (^^ Beat me to it)

The instructions are a bit confusing - is it just an amplifier and you have to supply a pure sine wave input to drive it?

"Input voltage: DC380V.
"Input voltage: AC16V. "

 

[normspanners]

The instructions are a bit confusing - is it just an amplifier and you have to supply a pure sine wave input to drive it?

I 'think' it is for modifying a standard semi sine wave inverter to a pure sine wave obviously the pure inverters are a lot more expensive, so this little board in theory converts them into full pure units. I have a couple of inverters here that it would be handy if they were full pure sine wave.
IMO at £20 might be worth a go ?

 

[normspanners]

I was have another read of the blurb trying to understand it and I think it creates the extra voltage that the sine wave produces and adds it to the the modified square voltage so that you get the extra peaks that a true sine wave gives before the RMS voltage is arrived at?

 

[Omniata]

So do you have a 380V DC source?

 

[normspanners]

this is a quote from http://www.qsl.net/dg5sga/inverter.htm and the dc voltage required is quite high to get the 240 rms of pure/ish sine wave so in answer

So do you have a 380V DC source?

maybe yes ?