[Kenwood] TS-940 on an Inverter

Mon, 10 Jun 2002 20:11:42 -0400 (EDT)

Hi,

The least expensive inverters (as a function of power) are square wave, 
give or take. More commonly, in the 300-1500W class, one finds "modified 
sine wave" aka very high THD approximation of sine wave.

When using something with a switching supply the waveform is not too 
critical. With a linear supply, such as the '940S however, dissipation is 
increased; in both transformers and active elements; things get hotter.

More importantly, most of the consumer grade inverters I've seen are big 
hash generators from a ham perspective. Your RX and those of the nearby 
may get unpleasant.

There are inverters produced which have low THD; nice waveform; but they 
cost a lot more.

The '940 is an excellent radio IMNSHO, but Field day is much easier using 
ancient battery technology and a 12 VDC rail.

GL es 73,

Steve
KL7JT/1

On Mon, 10 Jun 2002, Mark Fancher wrote:

> All:
> 
> Has anyone had any experience using a '940 with an inverter?  Seems like if
> this would work, it would make for a great Field Day station.  You can pick
> up some inverters from RS that aren't all that expensive.
> 
> I think these things output something that isn't exactly like a sine wave.
> Maybe with an HF station, this isn't critical?
> 
> Mark
> 
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