Aguilar DB750

[xtian]

This is new to me. Why are ferrite beads glued to the power FETs in this amp?

[The Dude]

Odd, I've seen them many times on the legs of the FET's, but never glued to the body of the device. Maybe they're handles to remove the device easier. Lol

[DrGonz78]

Maybe it has something to do with the fact that electrons don’t move through crystal lattices as good as tubes. So the ferrite beads are attached as a power saving tool. It all really makes perfect sense.

[xtian]

The beads are glued to all six FETs on one side, and none on the other side! Everything in this amp is mint, untouched, as from factory. As you can see, there are also ferrite beads on the (gate or source?) resistors, that's not uncommon.

Head scratcher.

Anyway, this amp just had a broken treble pot, which was pretty easy to access after removing face plate.

[drewl]

heat sink?

[g1]

Maybe some kind of oscillation issue?
Other pics I've found don't have them, so I'll guess they had an issue that got dealt with or this was a way of dealing with some issue?