Ramsey Electronics AM25 Manual de instrucciones descargar pdf (Pagina 16)

AR1 • 16

 78. Install C27, 100 to 220 µF, observe polarity.

 79. Install C28, .01 µF (marked .01 or 103 or 10nf).

 80. Install U4, the LM386 audio amplifier IC. Observe proper orientation of

the notched end.

 81. Install C29, 100 to 220 µF electrolytic. Observe polarity.

 82. Install R27, 1K ohms [brown-black-red].

83. The battery hold-down clamp can be secured by looping a component lead

wire through the bracket holes and into the PC board. Solder the wires on the

board and on the clamp. Do not use too much solder on the clamp or the

battery will not seat fully.

CONGRATULATIONS! If you've made 235 good soldering connections and

have all parts identified and oriented correctly, you now own a working AR1

Aviation Band Receiver ready to test, adjust and enjoy!

ANTENNA CONSIDERATIONS

An antenna for your AR1 can be as simple as a 21" piece of wire or a fancy

roof-mounted aviation antenna. Most folks near an airport will get plenty of in-

the-air action from the wire, but if you're more than a few miles away, a decent

roof-mount job is the way to go. Radio Shack sells an ideal antenna designed

for scanners which covers the aircraft band nicely - cost is around $30. A low

cost TV antenna works well, even better if rotated 90 degrees (remember

aircraft antennas are vertically polarized). If you really want to learn and

experiment, check out Radio Shack's book on antennas, No. 62-1083. If you've

enjoyed building this kit, there's lots more ready for you in the Ramsey catalog -

call or write for your copy today!

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Ramsey Electronics AM25 Manual de instrucciones Pagina 16