[Milsurplus] Re: More Russki / DC-AC inverters

[Bob Camp]

Hi

You *do not* want to listen to one of those things running at 400 Hz.  
Trust me on this one. Last time I saw a stack doing that was in a  
plant in St. Petersburg (not the one in Florida). The noise was still  
noticeable through a foot of concrete.

Of course these may not be the same design....

Bob
KB8TQ

On Jul 28, 2007, at 7:33 AM, Marty Reynolds wrote:

>
>>
>> Sorta 'reverse switchers' where instead of going fm 200vdc chopped
>> to 5V/12V/etc, u go fm 11V (after polarity prot'n) chopped to 160v
>> @ 20khz - rectify - then "H-bridge" & shape for 115vac rms.
>>
>
> Note the H-bridge polarity switching runs @ 60hz.  Who's gonna
> be the techno hero out there that'll find out where 60hz generated
> & re-set same for 400hz???
>
> This to me is back to the point of the beginning 1.5 yrs. back.
> Using the 'slabs' & 'derringers' to run gi fm lo-band 2-ways was
> a lucky side-trip
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