[simpits-tech] Anyone awake?

[David C. Allen]

Hi Jay
I would like to use the original 737 autotransformer dimmers for the 
lighting system. I am using DC for the non-dimmed circuits.

I have some large 110VAC 400Hz to 28VAC 400Hz stepdown transformers. 
I also have the 28Vac to 5Vac 400Hz stepdown transformers.

So my ideal 400Hz voltage is 110Volts.

The 400Hz flow is 110Vac to the 110Vac to 28Vac stepdown transformer, 
then the 28Vac autotransformer dimmer, then 28Vac to 5Vac stepdown 
transformer, then to the 5Vac lighting circuits.

Is anyone a electronics expert?

Here is a web link

http://www.737flightsim.com/Light_Dimmer3.pdf

I would like to know if you guys think it would work.

It is basically a DC power dimmer operating at 400HZ, and I use the 
400hz to generate the dimmer control voltage using the original 737 
variable autotransformer

David

At 04:17 PM 7/1/2006 -0500, you wrote:
>True, but how many VA do you need?  I only have a backup ADI that need
>26/400.  All the other stuff is 115/400 and is stepped down internally.
>
>Jay
>
>-----Original Message-----
>From: simpits-tech-bounces at simpits.org
>[mailto:simpits-tech-bounces at simpits.org] On Behalf Of David C. Allen
>Sent: Saturday, July 01, 2006 4:06 PM
>To: Simulator Cockpit tech list
>Subject: RE: [simpits-tech] Anyone awake?
>
>At 02:05 PM 7/1/2006 -0500, you wrote:
> >My understanding is that the transformers are wound different.  Although,
> >I've also been told you can run a 60Hz transformer at 400 hz but not the
> >other way around.  I bought a couple of transformers just for this purpose
> >but never got around to testing them.
>
>Yes the low frequency is the governing factor with the transformer so
>a 60Cps should work at 400Cps
>
> >Patience on eBay will turn up static boxes that will do 26vac 400hz.  I've
> >managed to snag two of them for under 200 bucks.  They don't show up too
> >often but when they do, they aren't cheap either.
>
>And most are less than 1000VA. :-(
>
>
>David
>
> >Jay
> >
> >-----Original Message-----
> >From: simpits-tech-bounces at simpits.org
> >[mailto:simpits-tech-bounces at simpits.org] On Behalf Of David C. Allen
> >Sent: Saturday, July 01, 2006 1:57 PM
> >To: Simulator Cockpit tech list
> >Subject: Re: [simpits-tech] Anyone awake?
> >
> >Hi Gene
> >My Ham friend has a ton of them, but I would like to find a way to
> >change a simple 12vdc to 110vac 60Hz Inverter to 400hz. Some say it
> >is just a RC frequency component change.
> >
> >David
> >
> >
> >At 11:50 AM 7/1/2006 -0700, you wrote:
> > >David C. Allen wrote:
> > >>Trying to find an inexpensive way to supply 28vAC 400CPS
> > >Your best bet would be to find a cheap dynamotor on ebay.
> > >
> > >g.
> > >
> > >
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