View Single Post
Old 30th Sep 2022, 3:55 pm   #15
m0cemdave
Octode
 
Join Date: Feb 2009
Location: Bletchley, Buckinghamshire, UK.
Posts: 1,205
Default Re: How safe are our collections?

Quote:
Originally Posted by Richard_FM View Post
This has some interesting reading:
https://www.bvws.org.uk/405alive/tech/safety.html
There's a serious error in that article:

quote:
Mercury, which is poisonous, is used as a getter to absorb any remaining oxygen molecules in valves; this is what causes the internal silvering on some valves.
:end quote

It's usually Barium. Heated up Mercury would vapourise and have the opposite effect of a getter.

I wonder if that article has any bearing on the unhappy tales of very expensive valves being destroyed by a certain export shipping agent as "containing hazardous substances".
m0cemdave is offline