Ramsey Electronics QRP20 Benutzerhandbuch

QRP-20

• 9

PARTS SUPPLIED WITH QRP20 TRANSMITTER KIT:

CAPACITORS:

1 47 pf capacitor (C6)

2 68 pf capacitor (C2,C12)

2 220 pf capacitor (marked 220 or 221) (C17,C18)

1 330 pf capacitor (marked 330 or 331) (C3)

11 .01 uf capacitors (marked .01 or 103 or 10 nf)
(C1,4,5,7,8,9,10,13,14,15,19)

1 100 to 220 uf electrolytic capacitor (C16)

INDUCTORS:

3 100 uh inductor (looks like a resistor with brown-black-brown-gold or silver
bands) (L2,L4,L5)

1 2.2 uh inductor (green body with: red-red-gold-black color bands) (L1)

2 1.0 uh inductor (brown form with wire wrapped around body) (L3,L6)

RESISTORS:

3 100 ohms [brown-black-brown] (R7,R9,R11)

1 270 ohms [red-violet-brown] (R10)

1 470 ohms [yellow-violet-brown] (R6)

2 1K ohms [brown-black-red] (R12,13)

4 10K ohms [brown-black-orange] (R4,5,14,15)

1 47K ohms [yellow-violet-orange] (R8)

2 1 megohm [brown-black-green] (R2,3)

1 10K potentiometer (R1)

SEMICONDUCTORS:

1 2N3904 NPN transistor (Q1)

2 2N3053 NPN transistor (Q3,Q2)

1 PNP transistor (Q4) (marked 221-334) (similar to 2N3906)

1 1N4148 diode (small glass diode)

1 1N4002 diode (large black epoxy diode)

2 varactor diodes in TO-92 style case (D3,D4)

HARDWARE, OTHER COMPONENTS, MISC.:

1 Crystal "A" (14.060 MHz)

1 QRP-TX printed circuit board

1 heatsink for Q3

3 RCA-style jacks (J1,2,3)

1 DC power jack (J4)

1 pushbutton switch (S1)

REQUIRED, NOT SUPPLIED:

12-14 volt 500 ma DC power source

Key, keyer or computer interface terminated to RCA plug

RF output indicator (see text)

14 MHz antenna and/or 50 ohm dummy load