Paul,
I understand your frustration. Every device designed for mass production
has a custom transformer in it, as does every thing with a motor have a
custom motor.
When I decided to build a CRT clock in 2000, I was faced with the same
problem. So I sat down with a Morris coil winder and a bunch of cores
and bobbins that I scored in an estate sale, and a switching power
supply design book, and learned how they work.
I ended up designing my own power supply topology to run a CRT from a
single transformer. There are forward converters and flyback converters
and voltage multipliers. A voltage multiplier is both a forward
converter and a flyback converter, and if one wants to regulate several
supplies running from the same core, one needs to take both halves of
the cycle into account. So I used doublers on every secondary winding,
and achieved excellent regulation of both the LV and HV outputs.
Oops, was I supposed to patent that?
On 6/26/2017 4:40 AM, Paul Andrews wrote:
Hopefully I'm not totally off base in what follows. That would be embarrassing!
--
David Forbes, Tucson AZ
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