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that electrolytics are polarized and must be mounted as shown in the
diagram.
47. Install U3, the 324 op amp. Be sure to point the dot, notch, or band
as shown in the parts diagram. Solder all 14 leads
48. Install R15, 220K ohm (red-red-yellow).
49. Install R17, 330 ohm (orange-orange-brown).
50. Moving to the right of J3, Install R43 and 45, both 33K ohm (orange-
orange-orange).
51. Install transistor Q1, a 2N3904 type (marked 3904). Be sure to orient
the flat side as shown in the parts diagram.
52. Identify and install small signal diode D1, 1N4148 (glass bead type
with polarity band). Mount as shown in the parts layout diagram.
53. Install R16, 10K ohm (brown-black-orange). There is another plated
through hole inside the silkscreen for R16 that is not the installation hole.
Be sure to install the resistor lead in the proper hole.
54. Install C20, .47 uF electrolytic capacitor (marked .47). The banded
(negative) side faces R8.
55. Install R8, 22K ohm (red-red-orange).
56. Install C4 and C5, both .01uF disc capacitors (marked .01 or 103).
57. Install R5, 33K ohm (orange-orange-orange).
58. Install R11, another 33K ohm (what were those colors)....(orange-
orange-orange).
58. Install R12, 56K ohm (green-blue-orange).
59. Install C7, .1uF disc (marked 104).
60. Install C6, .01 disc capacitor (marked .01 or 103 or 10nF).
61. Install R6, 33K ohm (orange-orange-orange).
62. Install R14, 3.3K ohm (orange-orange-red).
63. Install R13, 10K ohm (brown-black-orange).
DDF1 • 21
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