Yeah, my rule of thumb is don't count on anodized aluminum being an insulator, and don't count on it being a conductor.? ? And kapton insulators can be punctured by burrs on a heatsink or device flange, so be careful there, too.? Been there, done that.? ? ? ? Jim Ford?
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-------- Original message --------
From: Froggie the Gremlin <jonpaul@...>
Date: 6/10/21 8:52 PM (GMT-10:00)
Subject: Re: [HP-Agilent-Keysight-equipment] Need info on TO-3 transistor insulator
Hi, anodized TO-3 oxide films on the insulators were easily punctured, resulting in shorts.
We used kapton and Bergquist TO-3 insulators.
For 220 W suggest,? you bolt direct to your heatsink and float the entire HS.
I have? designed tested and manufactured power magnetics since 1980s, never had to make such a fixture.
So very Interested in exactly what you are testing and the inductor design.
Bon Soir¨¦e
Jon
