What was the ripple requirement/EMI compatability
on this?

I have built this style of PS before - to power
a PRC-10 radio (old mil radio) and develop the
B+ (plate) potentials of +67 and +135 V plus the
+1.5V filament power from a +12V battery.

Used a toroid for transformer core ... it's been a few
years back now ...

Jim

----- Original Message -----
From: "Russell McMahon" <apptech@CLEAR.NET.NZ>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Tuesday, August 21, 2001 8:51 AM
Subject: Re: [EE]: Design Challenge - low power step down switching
regulator


> > I'd say it can be done with one transistor and
> > a very small coil with two windings...
> > :o)
> > -Roman
>
>
> I tend to agree - with reservations.
> Part of the reason for my doing it this way was to bring out the good
ideas.
> A self oscillating "ringing choke" / flyback converter is indeed one
> possible solution.
>
> Tell us how.
> How many of the design requirements are met by this.
>
>
>             Russell McMahon
>
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