•SOLDER ALL wires or pins of the part, whether the two wires of a resistor or the 18 pins of an IC socket.

•Nip or "trim" all excess wires extending beyond each solder connection, taking care that wire trimmings do not become lodged in PC board solder connections.

Enough said. . . Let's get building!

ˆ1. Install S1, the DPDT push-button switch. It fits correctly only one way. Ensure that the white plastic switch extends out over the edge of the printed circuit board. Solder all six pins.

ˆ2. Install J1, the Right Channel input jack. Solder all 4 points of the jack securely.

ˆ3. Install J2, the Left Channel input jack. Solder all 4 points of the jack securely.

ˆ4. Install J3, the RF output (antenna) jack. Solder all 4 points of the jack securely.

ˆ5. Install J4, the 2.5 mm phone jack (external DC input). Solder all 3 pins.

ˆ6. Install the 18-pin DIP socket supplied with your kit. There is no right or wrong direction to this socket, but the U1 IC itself certainly needs to be inserted correctly (later). Taking care of this socket early in the project will help you with positioning additional parts and will fine-tune your soldering technique. Before soldering, make sure the socket body is flush against the PC board, and that all 18 pins have been inserted. Solder all 18 pins and then CAREFULLY check to ensure you have not caused any "solder bridges" between pins.

ˆ7. Now that the IC socket has your prime attention, carefully insert the FM transmitter IC (U1) into the socket, taking gentle care that ALL 18 pins get into their proper holes. The orientation of the notched end, as shown on the Parts Layout Diagram is critically important.

Progress Note: The preceding steps have secured a sufficient number of components to your PC board to make general orientation around the board much clearer for installing additional parts. Further parts will be installed in three phases or groupings.

Page 8 Page 10
Page 9
Image 9
Ramsey Electronics FM10A manual Enough said. . . Lets get building
Page 8 Page 10

FM10A specifications

The Ramsey Electronics FM10A is a compact and efficient FM transmitter tailored for hobbyists, educators, and anyone with a passion for creating their own radio broadcast. This device stands out in the world of electronics due to its user-friendly design and array of features that make it an ideal starting point for both beginners and experienced users.

One of the main characteristics of the FM10A is its simplicity in setup and operation. Users can quickly assemble the kit without the need for advanced soldering skills, making it accessible to a broader audience. The transmitter operates in the FM band, allowing for high-quality broadcasts with minimal distortion. Its frequency stability is maintained through a PLL (Phase-Locked Loop) technology, ensuring that the transmitted frequency remains consistent throughout its operation.

The FM10A features adjustable transmission power, allowing users to customize their broadcast range. With a maximum range of approximately one mile under optimal conditions, this device is versatile enough for personal use, small events, or classroom demonstrations. Additionally, the transmitter is equipped with an audio input for connecting various media sources such as smartphones, computers, or other audio devices. This flexibility makes it suitable for a range of applications, from playing music to broadcasting educational content.

Another notable feature is its compact design, which makes the FM10A easy to transport and set up in different locations. The device is powered by a standard 12V supply, which is widely available, making it convenient for users at home or on the go. The lightweight nature of the unit further enhances its portability, enabling users to take their radio broadcasts anywhere.

The FM10A also includes an LED power indicator and a built-in antenna for straightforward operation. Users can enhance their transmitting range by adding an external antenna, providing further customization based on specific needs. The kit comes with comprehensive instructions to guide even those new to radio transmission through each step of assembly and operation.

In addition to its engaging technical features, the FM10A serves as an educational tool. Users can learn about radio frequency technology, electromagnetic theories, and audio broadcasting principles, making it an excellent addition to any STEM program. Overall, the Ramsey Electronics FM10A is a stand-out choice for anyone looking to delve into the world of FM transmission with a robust, user-friendly device that doesn't compromise on quality and functionality.
Top Page Image Contents