Can i increase the amperage of a step up transformer?
This is a basic Ohms law question.
U = I x R
The amperage is deepening on the resistance in the wood. So by decreasing the resistance in the wood will increase the amperage. Lower R = Higher I is U (voltage) is the same.
The voltage in the transformer is depending on the ratio between the primary and secondary coils and the input voltage (primary).
And to increase the amperage the wires needs to be replaced with a higher diameter (Lower AWG).
Ref.: https://en.wikipedia.org/wiki/Transformer