Re: LF: psu

[Peter Dodd <g3ldo@ukonline.co.uk>]

Hi Johan,
What an interesting solution.
British airborne radars used 80VAC at 2000Hz to reduce the size and 
weight of the PSU components, quite a consideration in systems like H2S.

Peter, G3LDO
> since you mentioned 400Hz (I meant cycles per second of course,
> sorry...) I assume that your are about to bring some wartime airborne
> equipment back to life.
>
> If efficiency is not at highest priority, take an audio amplifier,
> capable of delivering >15W with a good margin, feed  a 400Hz sine wave
> into its input and connect a 230V => some_low_voltage transformer
> "backwards" to the amplifier's output. Adjust the volume control to get
> 115V at the xfmr's output.
>
> 73
> Johan SM6LKM
>
> mal hamilton wrote:
>   
> > Need a psu that gives 115v - 15w output at 400 cps. Input could be
> > anything ie mains ac or dc.
> > If nothing is available I have a plan to divide a 4Mhz xtal down to 400
> > cps then amplify/step up to give 115v/15w
> > 73 de mal/g3kev
> >  
> >     
>
>
>