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Old 11th Feb 2018, 2:04 pm   #18
Philips210
Octode
 
Join Date: May 2007
Location: Redruth, Cornwall, UK.
Posts: 1,872
Default Re: AF 11* Transistors. Innards Removal?

Thanks for posting this excellent write up Hugo. I'm fascinated by this. This technique could be applied to NOS transistors with no apparent problem as a preventative measure. I have come across the tin whisker problem on other Mullard germanium transistors, most recently a AC188 in a Roberts R707. I suppose a similar method could also be applied to this type of transistor.

I would like to try out your method and it would be interesting to see the contents under a microscope.
I wonder if the whisker growth problem is only confined to tin and it's alloys or are there any other metals which exhibit the same issue?

Regards
Symon
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