RadioBanter - View Single Post - Running a radio from a large rechargeable cell or battery

October 31st 05, 01:03 PM

wrote:

[...]

I think "modified sine" wave inverters are OK for power tools and
devices that use resistive heating, but I won't power electronics from
one again.

Modified sine (really modified square wave) are hard on almost
anything but pure resistive loads -- even fluorescent lights have
trouble starting on them.

Any variable speed power tool is either going to go at one speed only
or blow the triac (spectacularly) on a modified sine wave inverter.

I can't say enough good things about Exeltech inverters. They are
pure sine wave, less than 1% THD at worst, any power factor, and are
rugged and well-designed. I own three, including one that is powering
the full-tower computer I'm typing this on, along with about a third
of the rest of the house (solar power). It's been running
continuously for 4 years. The other two are in the car, one for tiny
loads and one for larger loads.

Exeltech claims to be in use in the radio rooms of US embassies around
the world, and I certainly believe it.

I don't own stock or have any financial interest. I'm just a *very*
pleased customer.

Exeltech: http://www.exeltech.com
Cheap source for exeltech: http://www.advancepower.net

--
Eric F. Richards

"Nature abhors a vacuum tube." -- Myron Glass,
often attributed to J. R. Pierce, Bell Labs, c. 1940