Position the heatsinks side-by-side as shown below:
Apply the blue silicone pads as shown here:
Bolt the PA assembly to the heatsinks with two bolts with
insulating white plastic washers (see right).
The only mounting point in this case is the IRF510 tabs. This is
not ideal mechanically and you really should consider using a
proper enclosure.
Use a DVM, with one probe held in the screw head, and the
other touched to the central pin of each IRF510. You should
see NO continuity in either case. This is critical! The drain of the
transistor is connected to the tab. If there is a short from the tab
to the heatsink, the amplifier will fail; it means the silicone and screw has a short somewhere.
50W QCX PA kit assembly
1.00q
36
