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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: Re: Output Transistor Insulators posted by paul_f on January 10, 2001 at 09:08:21:
The Kapton film is there to reduce shorts due to dirt in the interface area.Look for Boron Nitride filled rubber insulating washers.They are usually very close to BeO2 at about half the cost.Thermal resistance on greased mica is about .35*C/watt,Boron filled .2*C/watt,greased BeO2 .17*C/watt,greased bare metal .09*C/watt bassed on a TO3 footprint.I replaced the Kapton insulators in a Levinson ML3,30 pcs per channel,with BeO2 and it ran much cooler.Grease is not only messy but difficult to apply properly so for most people I would recommend the Boron filled rubber ones.Read the data sheets because there are different grade devices.They cost over $2 each.Some high performance washers have a conductive screen that has a wire attached.If yours has any of these don't mess with it.
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Follow Ups
- Re: Output Transistor Insulators - djk 00:04:44 01/11/01 (1)
- Re: Output Transistor Insulators - gmb 18:10:25 01/11/01 (0)
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