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Install C13 and C14.
100 pF, COG dielectric, marked 101K
C13 and C14 are axial capacitors. Mount them as shown in Figure 39
Install the sockets for IC1 through IC3
Install the remaining 3 8-pin DIP
8
sockets in the IC1, IC2, and IC3 positions now. In
either case, the opamps will be installed later.
Make sure to match the shape of the socket to the shape of the silk-screen. IC2’s
orientation is different than IC1 and IC3. Assembly hints:
1. For each socket, solder just one corner pin, then inspect the socket to make sure
that it is flat to the printed circuit board.
2. If the socket is not flat, it’s easy to melt just the one pin, and get the socket
flattened out.
3. One the socket is flat, solder the remaining pins.
Install the Bypass Caps
Install the 0.1µF ceramic bypass caps. These caps are small and tan in color.
Install the Relays
Install the relays, observing the following assembly hints:
1. For each relay, install the relay and solder just one pin. Check the relay to make
sure that it sits flat on the PCB. If it isn’t sitting flat, then melt the solder on the
soldered pin, and make sure that the relay sits flat.
2. Make sure that you see all the relay pins project through the holes in the PCB.
This assures that they aren’t bent over.
8
DIP stands for Dual Inline Package.
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