My Trace (now Xantrex) 2.4 KW 12VDC sine wave (actually "pure" sine wave
inverters have a wave form like a stepped pyramid) has never caused any RF
interference that I am aware of in any of my electronics: computers, ham,
marine, entertainment or other radios or TVs.
Norm
S/V Bandersnatch
Lying Julington Creek
30 07.695N 081 38.484
Back when I worked for Xantrex and the new European CE specifications were
announced, it was decided to withdraw the products from the European market
because the cost of compliance was not warranted given the sales volume at
that time.
At that ime I conducted a test using a ham operator who I think was a member
of this list at that time.
We provided two inverters one a 1kW sine wave and the other a 1kW MSW
inverter. Lab quality spectrum analyzers were used to measure the extent and
nature of the emitted interference and subjective tests were also made as to
how it affected reception in the normal ham bands. It was obvious that th e
pure sine wave inverter was far superior. It had much less radiated and
conducted noise emissions. It was possible to carry on normal ham radio
operations. This suppression of RF interference was due to the nature of the
design required to make a pure sine wave inverter. This is not an
advertisement for Xantrex.
The argument is equally valid for all makes of sine wave inverters as far as I
know. CE certified products are definitely better than non CE certified
products in that respect.
Arild
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