Ramsey Electronics AF1 specification

31. Using a scrap component lead, form and install JMP11.

32. Install C13, .1 uF disc [marked .1 or 104].

33. Install C2, .001 uF disc capacitor [marked 102 or .001].

34. Install R1, 47K ohm [yellow-violet-orange]. I’ll bet you didn’t forget to stand it up.

35. Install C10, .01 uF disc capacitor [marked .01 or 103 or 10nF].

36. Install C12, .01 uF disc cap (that's snazzy electronics lingo for capacitor). Again, its marked .01 or 103 or 10nF.

Seems like we put this off forever, but it is now time to install the LM380 audio amplifier IC. Be advised that an IC socket IS NOT advisable in this application as the large copper trace acts as a heat “sink” for the IC. This prevents the chip from overheating when in use.

37. Now that you’re all warmed up with your soldering iron (pun intended), install the LM380 14 pin IC. Notice that one end of the chip is marked with a dot, notch, or band. Be sure to orient this end as shown in the parts diagram.

38. Install C1, .1 uF disc capacitor [marked .1 or 104].

39. Install R6, 100K ohm [ brown-black-yellow].

40. Install C6, 10 uF electrolytic. Check polarity when installing this part.

41. Using some more of your scrap component leads, form and install JMP5, 6, 7, 8, and 9. Circuit board space gets pretty tight underneath the MF8 IC’s so a few jumpers are needed to complete the necessary connections to the chip.

42. Install C3, 10 uF electrolytic. Did you check the orientation?

43. Install C8, 100 pF mica type disc cap [marked 100 or 101].

44. Install R12, 100K ohm [brown-black-yellow].

45. Install R4, 294K ohm [red-white-yellow-orange]. It is mounted lying down - I sure hope it doesn’t fall asleep on the job!

46. Install R16, 15, and 11; all 10K ohm stand up resistors [brown-black- orange].

47. Install C7, 10 uF electrolytic capacitor. Check the polarity.

48. Install R10, 10K ohm [brown-black-orange].

49. Form and install JMP10, the last jumper wire.

50. Install R17, 10K ohm [brown-black-orange]. Notice that I’m not reminding you to stand it up anymore.

AF1 • 12

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.