I am trying to switch on a DC to AC converter, the load for the primary side of the circuit (where the DMM is measuring across) is a transformer (which I have unfortunately not picked out yet due to being unable to produce a working DC to AC converter, and as a note the only concern for frequency and current I have is to make sure components aren't getting too hot, or damaged, also, ideally I would like a transformer on the scale of 5 inches and under which usually means higher frequency, aside from that frequency and current can vary) and I am trying to step up voltage to upwards of around 390VDC which will be delivered to the load which in my case is a cathode to create the electric field. I just want to create an electric field at the load of the secondary side of the circuit to achieve phase transition in Bose-Einstein Condensate by increasing the voltage instead of lowering the temperature. So as long as I see 390VDC at the cathode I am happy. The rectifier portion seems to be working well (tested separately with AC voltage applied) but I am having trouble with the DC to AC converter portion. The switching event works as expected which means I have approximately 12VDC going into my LM555. However when I measure after the DC to AC converter there's a result of <1VAC. Am I doing something wrong here circuit wise or the way I am measuring? Why such the large voltage drop? R1 = 10kohm, R2 = 100kohm, R3 = 100kohm (initially), C1 = C2 = 10nF
Also, it appears I have a pulsed DC instead of AC at the primary of the transformer. Can this be used? Or should it be strictly AC? Do some transformers allow pulsed DC?

Also, it appears I have a pulsed DC instead of AC at the primary of the transformer. Can this be used? Or should it be strictly AC? Do some transformers allow pulsed DC?

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