As you probably know, simplicity means 'longevity'. . . supposedly. The power transistor must dissipate the unused power; worst point as appx at the middle of the setting.

Since there's a lot of power dissipated, a heat sink is mandatory. When mine failed, I didn't find any silicon grease on the bottom of the b/r.

As can see repackaging the existing part into the same outline (or similiar) is the hardest problem but if you're good at that sort of thing, you can repair it sucessfully.

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Regards . . . . JimF
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'94 S500 Cpe

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