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 Blue Paste?

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oakdust



Posts : 12
Join date : 2010-10-13

PostSubject: Blue Paste?   Thu Oct 21, 2010 9:11 pm

found a blown termal fuse on the top of a resistor. The fuse was covered with a blue dreid paste. Can anyone tell me what to use over the top of the fuse when I replace the resistor and the fuse. I know this isn't for tube radios, but we don't have a vintage stereo page here. Moderator please feel free to move it if needed.
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Rich, W3HWJ



Posts : 10
Join date : 2010-10-17

PostSubject: Re: Blue Paste?   Fri Oct 22, 2010 10:36 am

Sounds like "thermal compound" also called "heatsink grease." Usually a silicone material, sometimes filled with zinc oxide powder. It's probably used to ensure good heat transfer from the resistor to the thermal cut-out. The thermal "fuse" will open promptly if the resistor overheats.

Rich
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gadget73



Posts : 10
Join date : 2010-10-13

PostSubject: Re: Blue Paste?   Fri Oct 22, 2010 3:23 pm

yeah, sounds like thermal compound. I've seen grey, white, and yellow, never blue but that doesn't really mean anything.
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