Transistor bend pix

30. Install C12, another .001 µf disc capacitor (marked .001 or 102).

31. Install C8, .1µf disc capacitor (marked .1 or 104).

These last four parts (R8,9 and C11,12) form parasitic suppression networks across each transistor to suppress any tendency for high frequency oscillation in the power amplifier.

32. Install C3, another .1µf disc capacitor (marked .1 or 104). Both of these capacitors bypass the center tap of the ferrite transformers to ground. Bypass means to provide a low impedance path to ground.

33. Install C1, 100 to 220µf electrolytic capacitor. Be sure to observe correct polarity.

34. Install C4, 560ρf disc capacitor (marked 560 or 561).

35. Install C5, 330ρf disc capacitor (marked 330 or 331).

36. Install C6, another 330ρf disc capacitor (marked 330 or 331).

37. Install C7, another 560ρf disc capacitor (marked 560 or 561).

38. Install wire jumper, JMP1. Use a scrap piece of component lead wire.

39. Locate the MOSFET power transistors and prepare the leads for insertion into the PC board. Bend down the two outside leads about 1/8" from the transistor body and the center lead about 3/16" from the body.

40. Mount the transistors and heatsinks to the PC board using the 4-40 screws and nuts. Solder all transistor leads. Note that the heatsinks may look slightly different from the ones shown.

QAMP-40 • 9

QAMP40 specifications

The Ramsey Electronics QAMP40 represents a notable advancement in the world of audio amplification, catering to both DIY enthusiasts and professional users alike. This compact, yet powerful audio amplifier is designed for high performance while maintaining ease of use and versatility, making it an excellent choice for various applications, from home audio systems to automotive setups.

One of the main features of the QAMP40 is its robust power output, delivering 40 watts per channel into an 8-ohm load. This capability allows it to drive a wide range of speakers effectively, producing clear and dynamic sound. Users can enjoy enhanced audio quality whether for casual listening, home theater setups, or more demanding audio applications.

The QAMP40 utilizes a Class D amplifier topology, known for its efficiency and minimized heat generation compared to traditional analog amplifiers. This technology not only ensures that the amplifier can operate quietly without the need for extensive heat dissipation measures but also allows longer play times on battery-operated systems. The compact form factor makes it easy to integrate into smaller spaces where traditional amplifiers might struggle.

Another standout characteristic of this amplifier is its versatile input options. The QAMP40 includes both RCA line-level inputs and a 3.5mm auxiliary input, allowing seamless connectivity with various audio sources, including smartphones, tablets, and CD players. This flexibility enables users to easily switch between different devices without the hassle of constantly reconfiguring their audio setup.

Further enhancing its appeal is the QAMP40's user-friendly design. The front panel features a simple volume control knob and a power switch, making it straightforward for users to operate without any complex configurations. The amplifier also comes with built-in protection circuitry, safeguarding the internal components from overload and short circuits, thus ensuring reliability and longevity.

In summary, the Ramsey Electronics QAMP40 is an excellent audio amplification solution that combines compact design, powerful output, and advanced technology. Its Class D architecture, versatile inputs, and user-friendly interface make it suitable for a wide range of applications. Whether you are an audio professional seeking a powerful amplifier or a hobbyist looking to enhance your sound system, the QAMP40 offers a compelling blend of performance and convenience that can meet diverse audio needs. Invest in the QAMP40 to elevate your listening experience today.

Ramsey Electronics QAMP40 manual Transistor bend pix

Models: QAMP40