Elmo EXTRA IQ RAVEN manual Mounting the Raven, Mounting the Heatsink, Mounting on the PC Board

Raven Installation Guide	Installation
MAN-RAVIG (Ver. 1.1)

3-3

3.4Mounting the Raven

3.4.1Mounting the Heatsink

The Raven dissipates its heat by natural convection, up to loads of 500W. For higher output loads, the amplifier should be mounted on an additional heatsink or cooled by fan. There are two 4.5-mm holes in the base plate for mounting an additional heatsink (see Figure 3-1).

3.4.2Mounting on the PC Board

When mounting the Raven on a PC board, four screws (in addition to the solder pins) may be installed to provide a mechanical connection. It is important to provide a spacer if any components are located above the amplifier. Failure to do so can warp the PC board or puncture the amplifier case. When selecting screws, the following specifications should be used. If a spacer has been added, the screw length must be calculated to penetrate the case by no more than 2.6 mm.

Screw Type: Phillips Pan Head Self-tapping (for plastic) screw – Nickel-plated Steel.

	Meets standards ISO 1478, EN 21478, or DIN 7970.
d	ST2.2
L	4.5*
P	0.8
dk	4.2
k	1.8
m≈	2.6
Phillips size	1

*4.5 mm is typical for mounting on a PC board assembly without spacers.

Table 3-1:Dimensions in Millimeters

Basic	ISO	Pitch	Main Diameter		Minor Diameter		Flat End Diameter
Diameter	Nr.	P	D1max	D1min	D2max	D2min	D3max	D3min
ST2.2	2	0.8	2.24	2.1	1.63	1.52	1.47	1.37

Table 3-2:Size Limits for Tapping Screw Thread