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  1. mugsmugs

    sink vs source

    I'm not sure there is much of a difference anymore, but I believe initially the difference was speed, as an NPN transistor was much faster then a PNP, so if you needed faster response time, the NPN transistor circuits were more desirable.
  2. mugsmugs

    Section VIII Division III Welding?

    Thanks. This is what I was assuming, but it was always "drilled" into our head that no welding was ever permitted. I think this was more to prevent anyone from simply "tacking" on a bracket or something that might jeopardize the vessel's integrity. Anyway, thanks again.
  3. mugsmugs

    Section VIII Division III Welding?

    Can anyone tell me if it would be possible to weld, re-machine and maintain certification on a Section VIII, Div. III vessel. Solid Forging.

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