Velleman K8060 Manual De Uso página 36

Power transistors
17. Mounting of the power transistors T7 (TIP147) and T8 (TIP142).

Apply a drop of heat conductive compound on the heat sink (see fig 8.0.)

Mount the isolation mica onto the heat sink, check the position of the hole.
Apply a drop of heat conductive compound on the mica.

Carefully bend the leads, see fig. 9.0

Mount the transistor on the heat sink, using a bolt, washer, lock washer
and nut.

IMPORTANT: If metal body transistors are used, a plastic
isolation washer must be applied (see 9.0.)
Fig. 9.0
12
Heat conductive
compound
M3 bolt
M3 nut
washer
Heat conductive
compound
Fig. 8.0
Lock washer
plastic isolation
washer
M3 bolt