Help me identify pins on this flyback

[HooRide]

Hello all, I've been interested in making a plasma speaker recently and need some help. I was able to find a N.O.S. flyback transformer but it didn't come with a pinout diagram.

I was able to find the schematic for the monitor (terminal actually) that the flyback was intended for and I have a schematic for the circuit I wish to make.

Any help figuring out which taps on the flyback correspond to the ones in the plasma speaker schematic would be great!

Also, this is one of my first high voltage projects. What are some necessary precautions and/or good practices when dealing with high voltage/flybacks in general.

Thanks.

[vk6zgo]

"Flyback" transformers,(more correctly called Horizontal output transformers),in TVs & Picture Monitors normally operate at around 15kHz with specifically shaped waveforms.

These transformers do several things beside the generation of EHT,such as to drive the Horizontal Deflection coils & also provide "boost HT" of around 150v which is ,in turn,used as the supply for the horizontal & vertical output stages.
We aren't "getting something for nothing",as the power to do this all comes from the lower voltage fixed supply.

In your circuit,you don't have the advantage of "boost HT"& have to live with your +24v.

From my calculation,the 555 produces a rectangular wave at a frequency of.20.57 kHz.

Horizontal Output transformers are quite "fussy" about what frequency & wave shape they are driven with,& efficiency will be poor.

I suppose you could shift the frequency to 15kHz,but that is perilously close to the Audio range,& you will have problems with intermodulation.
Even 20.57KHz is a bit marginal.

[HooRide]

Thanks for the info, I can see what you're talking about from the schematic, some of the taps lead to the deflection coils. The circuit attached to the post was the simplest I found online (and I had proof it worked from the video posted on youtube.)

I would like to work on a different circuit that would address some of your concerns once someone can show me which pins on the transformer are for the primary and secondary coils (well, minus the obvious red electrode for the secondary.)

Again, any help would be great!