I am having trouble getting high voltage transformers to power experimental tube circuits. Can I use an inverter or other equivalent circuit?
In fact the inverters also use transformers and the difficulties to get high voltage are the same. An interesting solution is to use a common 6 or 12 V transformer (depending on the filaments of the tubes used) with double primary (primary with central plug) and to connect it as a self-transformer. You can get close to 300 V with this configuration in a current of 50 mA at 200 mA depending on the power of the used transformer. See the circuit.
The value of the filter capacitor depends on the load current. See, however, that this circuit is not isolated from the power grid.
Another interesting possibility to obtain high voltage for tubes is to buy 110/220 V low power transformers found for adapting networks in many homes of electrical and electronic material, but in this case you will need to use an additional 6 V transformer or 12 V for the tube filaments.
