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Mounting semiconductors : mylar insulators

gmonno

Member
2004-07-05 10:23 am
Madrid
I'm building a Tubelab SE.
I'm reading the manual and reviewing the parts I ordered from Digikey (thanks George).

The thing is that it says to mount a mylar insulator between the heatsink and the semiconductor, but Digikey did not send me these insulators.

Should I have buyed them (there wasn't a key in parts list) or should they have come with the semiconductors?

Now where can I find them o replace with what?

Thanks for the help

gmonno
 
The insulators are something you need to buy. They are also important because the metal tabs are considered 'hot'.

I used this (4724K-ND):
4724 Keystone Electronics | 4724K-ND | DigiKey

If you don't want to make an order just for this, I've had good like salvaging the mounting hardware and insulators from junk boards (UPS battery backups are a good source).
 
I'm building a Tubelab SE.
I'm reading the manual and reviewing the parts I ordered from Digikey (thanks George).

The thing is that it says to mount a mylar insulator between the heatsink and the semiconductor, but Digikey did not send me these insulators.

Should I have buyed them (there wasn't a key in parts list) or should they have come with the semiconductors?

Now where can I find them o replace with what?

Thanks for the help

gmonno

Sorry, not thinking, didn't correct the quotation from the questioner. Either use mica with heat-sink compound or silicone and no compound.