In a message dated 5/24/06 11:02:28 AM Eastern Daylight Time,
Looks like way too elaborate a setup and way too many problems and not
enough power. Easy way that has worked for 15 years for me is to just buy
one of the 12v to 120v inverters and use it in the car. I have not been
bothered by RFI problems.
Wow, that's not my experience. The 300 watt inverter I used put out tons of
RFI, at least on HF. I never tried it at VHF.
My inverter, a cheap one, makes a "modified sine wave". That's
marketing-ese for "square wave", of about 90 volts peak, or the same RMS value
as a 120
volt sine wave.
The good news is that a "Car Adapter", i.e. a 12 volt to 18 volt DC-DC
converter, is totally quiet.
One observation: I have always powered it from its own battery, mostly
because I had a supply of commercial UPS pullout 12 volt 26 AH batteries. It
easier to use one of these batteries than to tie it into the car's electrical
system. A friend tried a car adapter with little or no improvement in RFI
levels while powered from the car electrical system. When he went to a
separate battery the noise disappeared.
And yes, the DC-AC inverter was also powered from its own battery.
73 - Jim K8MR
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