N_Cook wrote:
Before wasting time on this, de-rivetting the step up transformer mounting
etc.
Input side measures 5Mohm, HV output side 12.7R, but looks like a standard
mains transformer.


Shouldn't that be the other way round?


Would this be a purpose wound transformer or an off the shelf mains
transformer that could be replaced with similar, if so what sort of voltages
and which way round ?

They might have just used a low volts to mains tranny the 'wrong way round'

Ron