Sil-Pad for Hifonics BX1000D

79twotone · 1st July 2010, 10:49 PM

Replaced some fets in the amp and tore some of the sil-pad in a few places. Was wondering if anyone knew what type I could use to replace it with. Any info would be appreciated...added a pic to help identify the sil-pad type

Perry Babin · 1st July 2010, 11:10 PM

There are several options other than the silicone pads. The 1mil kapton tape with 2mil silicone adhesive works well for class D amps. The kapton MT material (mcmaster-carr part number 2271K24) works well and is a slightly better thermal conductor (not significantly important for class D amps) but has to be cut to size. Mica insulators work well but are tedious to have to deal with. All of these would be used with thermal heatsink compound.

79twotone · 4th September 2010, 03:58 PM

Thanks and sorry for the late response. One more question, which thermal heatsink compound would you recommend me using?

Perry Babin · 4th September 2010, 07:54 PM

IF you're going to continue doing repair work, I'd suggest buying a tube of Dow Corning 340. If you only need compound for this repair, Radio Shack has compound that will work.

1st July 2010, 10:49 PM	#1
79twotone diyAudio Member Join Date: Sep 2007	Sil-Pad for Hifonics BX1000D Replaced some fets in the amp and tore some of the sil-pad in a few places. Was wondering if anyone knew what type I could use to replace it with. Any info would be appreciated...added a pic to help identify the sil-pad type

1st July 2010, 11:10 PM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	There are several options other than the silicone pads. The 1mil kapton tape with 2mil silicone adhesive works well for class D amps. The kapton MT material (mcmaster-carr part number 2271K24) works well and is a slightly better thermal conductor (not significantly important for class D amps) but has to be cut to size. Mica insulators work well but are tedious to have to deal with. All of these would be used with thermal heatsink compound. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

4th September 2010, 07:54 PM	#4
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	IF you're going to continue doing repair work, I'd suggest buying a tube of Dow Corning 340. If you only need compound for this repair, Radio Shack has compound that will work. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

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4th September 2010, 03:58 PM	#3
79twotone diyAudio Member Join Date: Sep 2007	Thanks and sorry for the late response. One more question, which thermal heatsink compound would you recommend me using?

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