Tips and Notes | Ramsey Electronics QAMP20 instruction

REQUIRED, NOT SUPPLIED:

Ramsey case, knob and panel set, Ramsey part no. CQRP

Matching input and output cables to existing QRP transmitter

12 volt DC power supply 3 amp rating

Proper dummy load or resonant antenna

"THE RAMSEY LEARN-AS-YOU-BUILD ASSEMBLY STRATEGY"

Take a look at the parts layout diagram. There is quite a lot to the construction of the QAMP20. It's easier than it seems once you get going, especially after you have installed a few of the "landmark" components. Once these "landmark" components are placed, other parts’ positions are referenced to them, and construction goes quite smoothly. This will help in relating from one part to another what specific holes it may require on the board, and that part's orientation. In addition, we will discuss the purpose of most components or groups of components as we go along. This is the Ramsey Learn-As-You-Build kit assembly philosophy. Be sure to read through all the steps, and check the boxes as you go to be sure you didn't miss any important steps. Most of the problems we find here at the factory are due to faulty assembly, no matter how experienced the builder may be: it’s especially tough to tell a 30 year experienced ham that he goofed! Before you run the circuit, check all diodes and polarized capacitors for proper orientation.

TIPS AND NOTES:

Use a good soldering technique - let your soldering iron tip gently heat the traces to which you are soldering. Heat both wires and pads simultaneously. Apply the solder on the iron, lead, and the pad when pad and wire is hot enough to melt the solder. The actual joint should look like a drop of water on paper (somewhat soaked in).

Parts are mounted on the top side of the board. This is the side that has no traces or pads on it.

Part orientation - All parts in this kit are mounted at 90 degree angles, meaning parts are either parallel or perpendicular to the sides of the board.

Part installation - When parts are installed, the part is placed flat to the board, and the leads are bent on the backside of the board to prevent the part from falling out before soldering. The part is then soldered into place, and the spare leads are removed. Make sure lead lengths are as short as possible when dealing with the RF section of this kit.

QAMP20 • 6

QAMP20 specifications

The Ramsey Electronics QAMP20 is a versatile high-fidelity audio amplifier designed to meet the needs of audio enthusiasts and professionals alike. This compact amplifier is characterized by its exceptional sound quality, robust construction, and user-friendly features, making it suitable for a wide range of applications, from home theater systems to professional audio setups.

One of the standout features of the QAMP20 is its power output. With a maximum output of 20 watts per channel, the amplifier delivers clear and powerful sound, capable of driving a variety of speaker types with ease. The QAMP20 is particularly well-suited for small to medium-sized speakers, providing ample power to enhance the listening experience without distortion, even at higher volumes.

The QAMP20 employs advanced technology to ensure the best possible audio performance. It features a class AB amplifier design, known for its excellent linearity and low distortion. This technology strikes a balance between performance and efficiency, ensuring that users receive high-quality sound while minimizing power consumption. Furthermore, the unit utilizes high-grade components, including capacitors and transistors, which contribute to its overall durability and reliability.

In addition to its impressive audio performance, the QAMP20 boasts a user-friendly interface, making it easy to integrate into any audio setup. It includes multiple input options, allowing users to connect various audio sources, including CD players, computers, and digital music players. The rear panel features standard RCA inputs, while the front includes a 3.5 mm auxiliary jack, providing flexibility and convenience.

Another noteworthy aspect of the QAMP20 is its compact design. The amplifier is lightweight and small enough to fit seamlessly into most setups without taking up much space. This portability makes it an excellent choice for both home and on-the-go applications, allowing users to enjoy high-quality audio wherever they are.

In conclusion, the Ramsey Electronics QAMP20 stands out in the crowded market of audio amplifiers due to its combination of power, advanced technology, and user-centric design. With its ability to deliver exceptional sound quality and its flexible connectivity options, it represents an excellent investment for anyone looking to enhance their audio experience, whether at home or in a professional setting.