Ramsey Electronics AM25 Manual de Instruções descarregar pdf (Página 15)

AR1 • 15

 54. Install JMP 2.

 55. Install U3, LM324. Be sure to orient the notched end toward the front

(control) end of the PC board.

 56. Install JMP3.

 57. Install C23, .1 µF capacitor.

 58. Install R16, 47K [yellow-violet-orange].

 59. Install R17, 10K [brown-black-orange].

 60. Install R15, 47K [yellow-violet-orange].

 61. Install C22, .47 µF, observe polarity.

 62. Install JMP5.

 63. Install JMP4.

 64. Install R24, 47K [yellow-violet-orange].

 65. Install C25, 4.7 to 10 µF electrolytic. Make sure polarity is correct.

 66. Install R20, 47K [yellow-violet-orange].

 67. Install JMP6. (This is the LAST jumper wire!)

 68. Install C18, 100 to 220 µF electrolytic. Observe polarity.

 69. Install R19, 100K [brown-black-yellow].

 70. Install R18, 1K [brown-black-red].

 71. Install D3, type 1N4148. Observe orientation of banded end.

 72. Install C24, 0.1 µF.

 73. Install R22, 33K [orange-orange-orange].

 74. Install R23, 10K [brown-black-orange].

 75. Install R21, 47K [yellow-violet-orange].

FINISHING UP: THE LM386 AUDIO AMPLIFIER

 76. Install C26, 4.7 to 10 µF electrolytic, observe polarity.

 77. Install the battery snap wires, taking care that the red wire goes to the

(+) side as shown on the PC board drawings. Do not yet connect the

battery.

At this point, you now DO have a fully-functional AM aviation receiver. A test

amplifier connected to the ( - ) side of C26 would demonstrate this to be so, if

you are interested. Otherwise your receiver will be completed with installing

just five more components.

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Ramsey Electronics AM25 Manual de Instruções Página 15