Ramsey Electronics STC1 Instruction Manual - page 16
STC1
• 16
56. Install C8, a .022uF or .02uF ceramic capacitor (marked .022 or 223).
57. Install C29, a .0047uF or .005uF ceramic capacitor (marked .0047, 472,
.005, or 502).
58. Install C31, a .022uF ceramic capacitor (marked .022 or 223).
59. Install R8, a 3.3K ohm resistor (orange-orange-red).
60. Install R11, a 1.8K ohm resistor (brown-gray-red).
61. Install R12, a 1.8K ohm resistor (brown-gray-red).
62. Install C10, a .0047uF or .005uF ceramic capacitor (marked 472, .0047,
.005, or 502).
63. Install R37, a 1.8K ohm resistor (brown-gray-red).
Whew! I thought we were never going to quit installing parts! Now would be a
great time to go grab a soda or whatever meets you palette, relax, and then
come back to check on errors. You may be amazed at all the mistakes that the
gremlins caused you to make during the install process. Check all of your
soldering for cold solder joints, solder bridges, and correct part installment
before continuing. Especially check your capacitors, many people get confused
when they see the positive pin on the parts layout diagram, but the negative
one is denoted on the part itself, and should not be installed in the same hole.
64. Install C34, a .0047uF or .005uF ceramic capacitor (marked .0047, 472,
.005, or 502).
65. Install R31, a 3.3K ohm resistor (orange-orange-red).
66. Install R36, a 1.8K ohm resistor (brown-gray-red).
67. Install R51, a 1K ohm resistor (brown-black-red).
68. Install D1, one of the 1N4148 type diodes (clear body with black stripe
on one end). Make sure that this part is installed in the correct way since it
only conducts in one direction. Notice the banded end and make sure it is
installed in the same direction as in the parts layout diagram.
69. Install D2, another 1N4148 type diode (clear body with black stripe on
one end). Again note its orientation!
These previous two diodes are responsible for the limiting that occurs in our
limiting circuit of the left channel. The next diode is used in a peak hold circuit to
detect the signal level at where limiting occurs.
70. Install D6, another 1N4148 type diode (clear body with black stripe on