Ramsey Electronics AF1 manual Congratulations, Setup and Operatiion of the Audio Filter

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ˆ51. Install R3, 47K ohm [yellow-violet-orange].

ˆ52. Install R2, 750K ohm [violet-green-yellow].

ˆ53. Install R5, 100K ohm [brown-black-yellow].

ˆ54. Install R7, 49.9K ohm [yellow-white-white-red].

ˆ55. Install C14, .01 uF disc capacitor [marked .01 or 103 or 10nF].

ˆ56. Now we’ll install the two MF8 switched capacitance bandpass filter IC’s. If you prefer to use an IC socket, you may install one if you wish. Be aware, however, that our techies find more repair problems due to sockets than due to chips burned out from overheating with a soldering iron. Be extra careful not to “bridge” the printed circuit traces together. 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.

ˆ57. Install R23, 1K ohm [brown-black-red]. It mounts standing up.

ˆ57. Lastly, we have to wire the power “on” indicator LED. LED’s are polarized, so be sure to orient the long lead as shown in the diagram. The leads will slide through the holes on the top of the switch contacts. Be sure to leave enough lead length on the diode so it can “poke through” the front panel.

CONGRATULATIONS

Long

Lead

You have just completed your AF1 CW audio filter unit. Take a well deserved break now. Give your eyes a rest. When you return, be sure to check over your work on the

entire circuit board. Energizing the circuit board with solder “bridges” or misplaced components can damage your kit. Five minutes well spent now can save hours of troubleshooting time and dollars in expensive replacement components.

SETUP AND OPERATIION OF THE AUDIO FILTER

We know that your itching to use your audio filter, so here are the testing instructions to verify the operation of your filter.

ˆConnect a suitable power supply (12-14 V AC or DC) to the power jack.

ˆConnect an audio source (an audio function generator does nicely, but you may use the actual rig you’re going to connect your filter to, provided you are capable of receiving a 400 - 1000 Hz tone).

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Contents Audio Filter Ramsey Transmitter Kits AF1 CW Audio Filter Introduction Theory of Operation Resistors and Potentiometers AF1 Parts ListRamsey Learn-As-You-Build KIT Assembly Now, lets get building AF1 AF1 AF1 Parts Layout Diagram AF1 Congratulations Setup and Operatiion of the Audio FilterConclusion Troubleshooting InstructionsRamsey Kit Warranty AF1 CW Audio Filter Estimated Assembly TimeRequired Tools Additional Suggested Items

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.