At your risk.
Any voltage of current can be dangerous.
Take safety precautions.
It may not be so difficult as it may seem.
Why?
An MC, moving coil cartridge is low impedance. So few turns of wire are needed.
If a tape wound or other toroidal (ring) core is used, the magnetic circuit is so efficient that even less turns will provide the required inductance of each winding.
Now it can be read my web search that people may use microphone step up transformers such as world class Haufe for MC to MM applicatiins.
If moving coil microphones (typically 200Ω output impedance) are higher impedance than a typical MC cartridge, this means that more turns are used on microphone transformers.
So less turns may be a more efficient way for MC if they are lower impedance Therfore needing lower primary inductance for given low frequency response.
Somewhat turns may also aid in many other respects such ease of construction, extended high frequency cutoff etc.
In fact it has been read on:
https://www.vinylengine.com/turntable_forum/viewtopic.php?t=9265
that the STC 66122X may beat everything else.
Such a transformer has just arrived from an eBay and inductance had been measured. See next post.
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