Ramsey Electronics QRP20 User Manual
Page 9
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