Ramsey Electronics QRP-80 Manual de instrucciones descargar pdf (Pagina 12)

HR-80• 12

 22) Install the 9-volt battery snap connector, making sure that the

red (+) and black (-) leads are correctly installed.

 23) Install C7, .01µF disc capacitor (marked 103 or .01 or 10nF).

 24) Install C8, a small 2.2µF electrolytic capacitor. Observe

correct polarity.

 25) Install R6, 10K ohm resistor (brown-black-orange).

 26)Install U2, the LM386 audio amplifier IC chip. Just like the

NE602, you must correctly position the notched or banded end.

 27) Install C12, 100-220µF electrolytic capacitor; observe polarity.

This capacitor couples the output of the LM-386 to the speaker

jack.

 28) Install C9, 4.7-10µF electrolytic capacitor; observe polarity.

 29) Install speaker jack J2. This jack is a 2.5mm type and mates

with any 2.5mm plug as found on virtually all mini earphones.

 30) Install the 9-volt battery clamp. Use a scrap component lead

to loop through the two holes in the clamp and through the PC

board. Solder the leads firmly to the board and to the battery

clamp. Do not use too much solder on the clamp as this will

cause the battery to sit too high and not seat securely.

Congratulations! You have completed the assembly of your HR-80

receiver kit. Now is a good time to sit back and admire your work and

make a final check of all solder joints and component placement. It is

always better to find errors now before you test the HR-80, and it’s

easier on the ego, too!

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Ramsey Electronics QRP-80 Manual de instrucciones Pagina 12