Ramsey Electronics HR20 User Manual
Page 7
HR20
• 7
PARTS SUPPLIED WITH THE HR20 KIT:
CAPACITORS:
1 15pF ceramic disc capacitor [marked 15 or 15K] (C4)
1 27pF ceramic disc capacitor [marked 27 or 27K] (C13)
2 36pF ceramic disc capacitor [marked 36 or 36K] (C1,C2)
4 .01µF disc capacitor [marked 103 or .01 or 10nF] (C3,C5,C6,C7)
2 4.7 to 10µF electrolytic capacitor (C8,C9)
3 100-220µF electrolytic capacitor (C10,C11,C12)
RESISTORS:
3 10K ohm potentiometers (R1,R2,R3)
1 270 ohm resistor [red-violet-brown] (R4)
2 10K resistors [brown-black orange] (R5,R6)
INDUCTORS:
2 Shielded Coils [marked 42IF-123] (L1, L2)
SEMICONDUCTORS:
1 1N4002 Diode [black epoxy style] (D1)
1 SA602 IC (U1)
1 LM386 IC (U2)
1 6.2 volt Zener Diode [small grey glass body] (D2)
HARDWARE AND MISC:
1 Drilled printed-circuit board
1 9-volt battery hold-down bracket
1 9-volt battery connector
1 RCA-style jack [antenna connector] (J1)
1 subminiature earphone jack (J2)
1 PC mount pushbutton switch (S1)
REQUIRED, NOT SUPPLIED:
9-volt battery (alkaline or heavy duty type)
Earphone, or small speaker
Antenna and suitable cable
OPTIONAL:
Ramsey Electronics Case and Knob kit, Model CHR or;
Your own choice of enclosure and hardware