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I'm impressed so far :) very nice to be able to easily share an idea

I have a variety configurations of inductions in a circuit. I can model this in spice. (sorta)

I have a low duty cycle symetric square wave from a TL949. It is connected to drive a toroid that has 2 coils that are 6 turns and 2 coils that are 140 turns. One 6 turn coil is energized on one half of the cycle, the other 6 turn coil is energized on the other half signal; the TL949 generates two high pulses 180 degees seperated, each with the same duty cycle. 50% would look like a pure square wave, but functionally it's probably 2% or less. so there is a long low, a 1us rise, 20us ontime and 1us fall on each coil every other time. They are connected so the output coils (140 turn outputs ) pulled high and then low alternatingly... so it's sort of a push-pull driven transformer. It takes 12V in and generates something 240V out.

In Spice it allows defining seperate inductors and then coupling them together.

One Output goes just to another coil and a ground connection, That coil is coupled with a coil that is in parallel with a capacitor and is floating.

The other output goes to a bridge rectifier with a cap behind it....

Now that I've spent the work to describe it all, I'll learn that it can't be done :)

(after I wrote it, I figured I could just model it, can't get it to run something about L6.L )

I started a new one.

I think I have this right... (worked on it some, and added a copy of this other part to change the clock, but.... )

The other circuit doesn't work either....

Ahh well, guess I can still use this for sharing ideas

Question: what is a TL949?

I can't find any data on it on t'interweb ...

To generate a low duty cycle pulse waveform you can use a PWSREPEAT() source:

https://www.circuitlab.com/docs/expressions/

This will simplify your transformer drive circuit at least in the preliminary simulations.

Aaaaaaaaah ...

Did you mean a TL494?

http://www.onsemi.com/pub_link/Collateral/TL494-D.PDF

i have found that simulators have disappointing results sometimes thats why from what i can see breadboards will be with us for awhile yet