Optional Painting the Grille, Template mask

1.Remove the inner cardboard disc from the supplied template/paint mask and

keep it for later. Use the outer portion of the mask as a

template to mark the cutout Template hole size and location for mounting the speaker.

2.Use a drywall or keyhole saw to cut the hole.

(Optional) Painting the Grille

nNote: Do not paint internal speaker components. We recommend you spray-paint the grille so no paint gets in or blocks the holes.

1.To remove the grille, insert a paper clip into one of the openings and pull up.

2.Remove the dust cloth from behind the grille and replace it after you finish painting.

(Optional) Painting the Frame

Template mask

To prevent paint from entering the speaker, remove the grille and insert the supplied cardboard paint mask. After the paint is dry, remove the paint mask and replace the grille.

40-289 specifications

The Radio Shack 40-289 is a versatile and compact RF signal generator, a notable offering from the well-known electronics retailer Radio Shack. This device is designed primarily for hobbyists and professionals working in electronics, providing a reliable tool for generating various types of signals.

One of the standout features of the 40-289 is its frequency range, which allows users to generate RF signals from a few kilohertz up to several megahertz. This wide range makes it suitable for a variety of applications, including testing radio equipment, experimenting with circuit designs, and troubleshooting electronic devices. The ability to produce multiple waveform types, including sine, square, and triangle waves, adds to its versatility, enabling users to simulate different signal conditions.

The device is equipped with a built-in LCD display that provides real-time information about the output frequency, waveform type, and amplitude settings. This user-friendly interface makes it easy for both beginners and experienced users to navigate the features of the signal generator. Additionally, the 40-289 includes knobs for adjusting frequency and amplitude, allowing for fine-tuning to achieve precise signal characteristics.

In terms of connectivity, the 40-289 features standard BNC output connectors, making it compatible with a wide range of test equipment and circuits. It also has a headphone jack, which allows users to listen to the generated audio signals, a useful feature for audio signal testing.

Powering the device is straightforward, as it can be operated using standard batteries or an AC power adapter, offering flexibility for both portable and stationary use. The compact form factor of the 40-289 means it can easily fit into any workspace or be taken along for field tests.

Overall, the Radio Shack 40-289 RF signal generator stands out for its reliable performance, user-friendly features, and broad application scope. Whether you are a seasoned electronics engineer or an enthusiastic hobbyist, the 40-289 is a valuable addition to your toolkit, facilitating various experiments and troubleshooting scenarios with ease. With its blend of quality, functionality, and affordability, the Radio Shack 40-289 continues to be a favorite among electronics enthusiasts.