Ramsey Electronics 2 1/2 Watt Super Sleuth Audio Amplifier, BN9 manual Initial Tests

INITIAL TESTS:

❒1. Connect up 8 to 15 volts of DC power. For simplicity use a red wire for positive (+) and a black wire for negative (-). Wait! check polarity before switching on the supply.

❒2. Connect any speaker ranging from an impedance of 3 ohms to 45 ohms. Speakers in the 4 to 8 ohm region are best suited for this kit and will yield the greatest power. Make sure the speaker wires are in the correct holes!

❒3. If you are wiring up a jack for earphone or external plug-in speaker, the tip of the plug goes to the positive (+) speaker connection and the “sleeve” goes to the common ground (-) connection.

❒4. Apply an audio input such as a microphone. Any audio input should use shielded cable to pre- vent noise pickup such as AC line hum or other electronic equipment (including itself!). This will also prevent the possibility of self-oscillation which will sound like a terrible scream.