Home Tube DIY Asylum

Do It Yourself (DIY) paradise for tube and SET project builders.

RE: How hot is too hot?

The usual (industrial?) safety rule is surface temperature no more than 140F (60C) - basically, you have enough time to perceive the heat and take your hand away before getting a burn.

Inside it is probably hotter. Each component will have a max temperature rating in the spec sheet. For reliable operation, you must have a margin. In my experience that margin is larger than you think. For example, I try to keep silicon solid-state junction temperatures at 100C or less, though the spec is 150C. Some resistors at max spec temperature are hot enough to melt the solder that holds them in place. It's a judgement call for each component - a lot of work!

This post is made possible by the generous support of people like you and our sponsors:
  Amplified Parts  

Follow Ups Full Thread
Follow Ups
  • RE: How hot is too hot? - Paul Joppa 19:36:32 06/02/17 (1)


Post a Message!

Forgot Password?
Moniker (Username):
Password (Optional):
  Remember my Moniker & Password  (What's this?)    Eat Me
E-Mail (Optional):
Message:   (Posts are subject to Content Rules)
Optional Link URL:
Optional Link Title:
Optional Image URL:
Upload Image:
E-mail Replies:  Automagically notify you when someone responds.