"Joe McElvenney" wrote in message
...
Hi,

Not wanting to pour rain on the parade but -

Diagnostic x-ray transformers are only rated for very
intermittent use and are normally immersed in oil for cooling and
insulation purposes.

The meter in the picture is calibrated in mAs (not mA) so it
isn't obvious what the actual secondary current is. FYI, the
milli-amp seconds figure (tube current x exposure time) is preset
and used to set film darkening.

An x-ray tube is a temperature-limited vacuum diode so that
the current can be tightly controlled. Therefore, during the arc
shown, the secondary voltage will almost certainly have dropped
quite dramatically.


Cheers - Joe

Thanks for the info, knew it was time limited, but not the oil immersion
stuff.
It is built strange for a HV TF, probably optomized for the time and tube.
Ones I have seen are cubic foot black things.