User`s manual

7.3. Method 2: D-Sub jack mounted (more work- shown in ADA8000 pictures)
1. Locate the potentiometer terminal solder points on the front PCB
2. Cut the coupler wires “Ra” and “Rb” to about 20mm length and solder them to the potentiometer
terminals.
3. Use the enameled copper wire to connect the anode (“A” terminals) of all couplers together. To remove
the insulation and wet them with solder, heat the wire with the solder iron for about 20 seconds at 400°C.
Note: This must be done before connecting the wire to the couplers as they can be damaged by
excessive heat.
4. Prepare the ribbon cable: Insert the cable into the D-SUB connector with conductor #1 (red) on Pin 1 of
the connector. Pin 1 is upper left when looking at the mating face.
5. Make sure the cable is straightly oriented to the connector before press-fitting the connector (this can be
done using a bench vise. Be careful only to apply gentle force in order not to damage the connector).
6. Solder conductor #1 (red) of the ribbon cable to the “A” terminal of coupler at CH1
7. Solder conductor #2 to “C” terminal of coupler at CH1
8. Solder conductors #3...#9 to “C” terminals of couplers at channels CH2...CH8
9. Use cable ties to fix the wires to the anode wire as required.
10. Mark a rectangular cutout on the rear of the preamp
11. Apply some protection (for example, plastic foil) over the PCB to protect it from metal chips.
12. Cut the area using a saw (fretsaw), or a small grinder tool (e.g. DREMEL) with cutting disc.
13. Trim the edges using a file
14. Carefully remove all metal chips and metal dust from the interior of the preamp, especially from the
PCBs. This can be done using an old toothbrush and a vacuum cleaner.
15. Insert the 9-pin connector and mark the position of the holes
16. Remove the connector and drill 2 at the marked position (Ø3mm)
17. Mount the connector using the supplied bolts with flat washers on the front, and the spring washers and
nuts on the rear
18. Fix the ribbon cable on the mainboard as required.
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