PARTS LIST FOR THE QAMP40 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]

2 560 ρf disc capacitor (marked 560 or 561) [C4,7]

2 330 ρf disc capacitor (marked 330 or 331) [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-40 • 5

Ramsey Electronics manual PARTS LIST FOR THE QAMP40 QRP POWER AMPLIFIER, Capacitors, Resistors

Models: QAMP40