shock with hexfred's

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Hello, I recently installed a Hexfred Diode full wave bridge into my K16 tube amp. Does anyone know why when I touched one of the metal backs that would connect to a heat sink gave me a shock?

If this is normal, what do I need to do to it to eliminate shock?

I wanted to mount all four hexfreds on a single heatsink (aluminum), but after I got shocked, I know this is not a good idea.

Does anyone that deals with solid state know what will take care of this problem.

Other than that, it sounds great.

Thanks for everyone's help in these forums. The learning experience has been wonderful.
Sincerely,

Andy
 
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This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.