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Old 8th Dec 2017, 3:03 am   #17
emeritus
Dekatron
 
Join Date: Jan 2012
Location: Brentwood, Essex, UK.
Posts: 5,316
Default Re: Megger MIT310 with corroded? battery terminals

In the 1970's I handled numerous stud-mounted RF power transistors used a visible BeO insulation layer between the die and the stud, and my understanding from their documentation was that they were safe to handle while intact. It is only the dust which is hazardous, hence the warnings not to abrade, drill, or file the stuff. Beryllium alloyed with Copper is an alloy rather than a ceramic, and would not have the toxic dust problem.

My experience with Phosphor Bronze has been that it has a definite grain. Bend it along the grain, and no problems. Bend it across the grain, and it will fracture. I cannot claim to be an expert, but I have cut strips from a small length of wide Phosphor Bronze strip that I once salvaged from the scrap bin at Marconi's to make replacement brushes for small electric motors. These involved making right angle bends to match the original brushes, and I found it essential to consider the grain when marking out the metal to avoid fracture at the bends.
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