Ramsey Electronics AF1 guide

polarity. See the parts diagram for proper placement. The capacitor should fit snugly down to the PC board.

When installing the components be sure to save some of the longer clipped leads to use later as “jumper” wires.

12. Install C11, another 1000 uF electrolytic capacitor. Be sure to observe the proper polarity.

13. Install C19, 10 uF electrolytic. Again, remember that polarity!

14. Identify VR1, the 7808 voltage regulator [marked 7808]. This component, too, has a right and wrong way to be installed. Be sure the writing on the component faces inward toward the center of the PC board. Using gentle pressure push the part about 1/4” from the circuit board, and solder. See the parts diagram for proper installation.

15. Install C20, 10 uF electrolytic capacitor. Is that polarity correct?!

16. Using some of the scrap component leads, form and install jumper wire JMP1 in the holes provided in the PC board. Jumper wires act like little electronic “bridges” carrying signals from the bottom to the top side of the circuit board, and then back to the bottom side again.

17. Grab some more scraps of leads, form and install JMP2, 3, 4. Hey, this is better than recycling - if we keep this up there won’t be anything to throw away!

18. Install C9, the last large 1000 uF electrolytic capacitor. Be sure to observe the proper polarity.

19. Install D5, 1N4002 type diode. Note that the part stands up, and, watch which way the banded end is pointed.

That wasn’t so bad, now was it! You’ve just completed the bridge rectifier, filter, and regulation of your AF1 power supply. Take a moment now to check parts placement and inspect the solder side of the board for any solder opens or “bridges” between components or foil runs. Touch up any solder connections that are less than perfect. Now its time to get building the audio path through the AF1.

20. Install C16 (its adjacent to J3 towards the rear of the PC board),

.01 uF disc [marked .01 or 103 or 10nF].

21. Install C15, .01 uF disc [marked .01 or 103 or 10nF].

22. Install R19, 1K ohm [brown-black-red]. Note that this component is mounted standing up. Resistors aren’t polarized, so you can install it either way.

AF1 • 9

AF1 specifications

Ramsey Electronics AF1 is a state-of-the-art audio frequency oscillator, renowned for its versatility and performance in various electronic applications. Designed for hobbyists and professionals alike, the AF1 is an essential tool for anyone working with sound generation, modulation, or detection.

One of the main features of the AF1 is its wide frequency range, spanning from 1 Hz to 100 kHz. This broad coverage enables users to generate tones suitable for a multitude of tasks, from simple audio testing to more complex signal modulation in communication systems. The AF1 provides a stable wave output, which is critical in maintaining audio fidelity and ensuring accurate readings in testing environments.

The AF1 employs advanced technologies to achieve its remarkable performance. One of these is its precision frequency control, which allows users to set the output frequency with accuracy. This is facilitated by the device’s inclusion of a calibrated variable resistor, enabling fine adjustments for precise frequency generation. Additionally, the AF1 features a built-in frequency counter that simplifies the process of monitoring the output frequency, providing users with a valuable tool for troubleshooting and calibration.

Another characteristic that sets the AF1 apart is its dual output channels. This allows for the simultaneous generation of two distinct frequencies, offering greater flexibility in applications requiring complex audio signals or dual-tone generation. The outputs are adjustable in amplitude, which helps users tailor their signals according to specific requirements, whether for testing speakers or experimenting with audio synthesizers.

The AF1 is also designed with ease of use in mind. The interface is intuitive, featuring a straightforward layout of dials and switches that enables quick adjustments and settings. This user-friendly approach is ideal for those who may not have extensive experience with electronic signal generators.

Constructed with high-quality components, the RAMSEY AF1 ensures durability and reliability, making it suitable for both fieldwork and laboratory settings. Its compact design allows for easy transport, fitting seamlessly into any toolkit.

Overall, the Ramsey Electronics AF1 is a powerful audio signal generator equipped with a rich feature set, including extensive frequency range, dual outputs, precision control, and intuitive usability. Whether you are a hobbyist, educator, or professional, the AF1 is a valuable asset for any electronic project involving sound generation.