Resistors, Semiconductor Devices | Ramsey Electronics QAMP30

PARTS LIST FOR THE QAMP30 QRP POWER AMPLIFIER

CAPACITORS:

1 100 to 220 µf electrolytic capacitor [C1]

1 10 µf electrolytic capacitor [C2]

4 .1 µf disc capacitor (marked .1 or 104) [C3,8,10,13]

2 330 ρf disc capacitor (marked 330 or 331) [C4,7]

2 560 ρf disc capacitor (marked 560 or 561) [C5,6]

2 .001 µf disc capacitor (marked .001 or 102 or 1000) [C11,12]

1 .01 µf disc capacitor (marked .01 or 103 or 10 nf) [C9]

RESISTORS:

3 1 K ohm resistor (brown-black-red) [R1,5, TP1]

1 6.8 K ohm resistor (blue-gray-red) [R2]

2 10 K ohm resistor (brown-black-orange) [R3,12]

1 470 ohm resistor (yellow-violet-brown) [R6]

1 100 K ohm resistor (brown-black-yellow) [R7]

2 270 ohm resistor (red-violet-brown) [R8,9]

1 51 ohm resistor (green- brown-black) [R10]

1 2.2 K ohm resistor (red-red-red) [R11]

1 5 K potentiometer (marked 502M) [R4]

SEMICONDUCTOR DEVICES:

1 Zener diode, 6.2 volt (gray body with black band) [D1]

2 1N4148 type signal diode (glass body with black band) [D2,3]

1 1N4002 style black epoxy diode [D4]

2 Power MOSFET transistor (marked P16NF06) [Q1,2]

2 2N3904 NPN transistor [Q3,4]

1 221334 PNP transistor [Q5]

OTHER COMPONENTS:

1 Relay DPDT 12 volt [K1]

1 PC mount pushbutton switch [S1]

2 RCA style PC mount phono jacks [J1,2]

1 2.5 mm DC power jack [J3]

2 Heatsink [HS1,2]

3 Yellow toroid coil core [L1,2,3]

1 10 µH inductor [L4]

1 2 hole small ferrite transformer core [T2]

1 2 hole large ferrite transformer core [T1]

7' #24 enameled magnet wire (thin wire) [for winding L1,2,3 and T1,2]

2 4-40 x ¼” machine screw

2 4-40 hex nut

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

QAMP-30 • 5

QAMP30 specifications

Ramsey Electronics QAMP30 is a versatile audio amplifier designed for a range of audio applications. This compact yet powerful amplifier is specifically engineered to provide quality sound in a small footprint, making it ideal for home audio systems, portable audio setups, and compact installations.

One of the main features of the QAMP30 is its robust 30-watt per channel output, delivering clear and dynamic sound that can fill a room. Its solid state design ensures reliability and durability, making it suitable for both casual listeners and audiophiles. The amplifier supports continuous operation, allowing users to enjoy music for extended periods without worrying about overheating or performance degradation.

In terms of connectivity, the QAMP30 is equipped with multiple input options. It includes RCA inputs for easy connection to various audio sources, such as televisions, DVD players, and computers. This flexibility allows users to integrate the amplifier seamlessly into their existing audio setups. Additionally, the amplifier features a 3.5mm auxiliary input, further expanding its compatibility with portable devices like smartphones and tablets.

The QAMP30 also incorporates advanced circuit design technologies to enhance audio performance. Its low noise floor and high signal-to-noise ratio ensure that audio playback is clean and free from unwanted distortion. This feature is particularly important for critical listening environments where audio fidelity is paramount.

Moreover, the QAMP30 has an integrated volume control knob, giving users direct access to adjust their listening levels easily. The simple, user-friendly interface and compact design permit versatile placement in various setups, whether on a shelf, desk, or installed within a larger audio system.

Furthermore, the amplifier is equipped with built-in protection features, such as thermal overload and short-circuit protection, safeguarding the device and connected audio equipment from damage. The overall build quality of the QAMP30 reflects Ramsey Electronics' commitment to producing reliable and effective audio products.

In summary, Ramsey Electronics QAMP30 is a compact, powerful audio amplifier featuring 30 watts per channel output, multiple input options, advanced circuit technologies, and built-in protection features. Its user-friendly design and high-performance characteristics make it an excellent choice for anyone looking to enhance their audio experience.