We used to do it on purpose.
The old US made hard plastic ones
worked best. Had a 50 amp supply we used. The higher the mfd
the better.
Oh if you didnt figure it out they explode quite nicely at times.
Trouble is they stink up the shop badly & the boss gets pissed.
Told him it was a FBT, it was one of those "yeh right" moments......
73 Zeno