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SS70A • 7
SS70A PARTS LIST
Sort and “check off” the components in the boxes provided. It’s also helpful to
sort the parts into separate containers to avoid confusion while assembling.
RESISTORS AND POTENTIOMETERS
1 2 ohm resistor [red-black-gold] (R13)
1 10 ohm resistor [brown-black-black] (R6)
1 100 ohm resistor [brown-black-brown] (R1)
4 470 ohm resistors [yellow-violet-brown] (R3,5,9,14)
2 1K ohm resistors [brown-black-red] (R7,12)
1 10K ohm resistor [ brown-black-orange] (R16)
4 100K ohm resistors [brown-black-yellow] (R2,4,10,15)
1 1 Meg ohm resistor [brown-black-green] (R8)
1 10K ohm variable potentiometer (R11)
CAPACITORS
2 22 pF disc capacitors [marked 22 or 22K] (C6,7)
2 100 pF disc capacitors [marked 100 or 101] (C2,11)
1 .01 uF disc capacitor [marked .01 or 103 or 10nF] (C14)
3 .1 uF disc capacitors [marked .1 or 104] (C3,13,16)
5 10 uF electrolytic capacitors (C1,5,9,12,18)
1 100 to 220 uF electrolytic capacitor (C10)
2 1000 uF electrolytic capacitors(C15,C17)
SEMICONDUCTORS
4 1N4148 diode [orange glass body with black band] (D1,2,3,4)
2 2N3904 NPN transistors (Q1,2)
1 MX128 scrambler IC chip (U1)
1 LM380 audio amplifier IC (U2)
1 7805 voltage regulator (VR1)
MISCELLANEOUS PARTS AND HARDWARE
1 3.58 MHz or 10.24 MHz crystal (Y1)
4 PC mount 3.5 mm phone jacks (J1,2,6,7)
1 .5 mm center pin type power jack (J5)
3 DPDT PC mount switch (S1,S2,S3)
1 3 pin vertical header strip
1 SS70A circuit board
REQUIRED, NOT SUPPLIED
9 to 15 volt battery or power supply
Speaker or earphones
3.5 mm plugs or adapters (2 to 4 depending on application)
Optional Ramsey CSS70A enclosure set