Ramsey Electronics TT1 Instruction Manual - page 7
of
16
TT1
• 7
TT1 PARTS LIST
RESISTORS
1 470 ohm [yellow-violet-brown] (R6)
2 47K ohm [yellow-violet-orange] (R2,7)
1 470K ohm [yellow-violet-yellow] (R4)
2 4.7M ohm [yellow-violet-green] (R3,5)
1 100K ohm [brown-black-yellow] (R1)
CAPACITORS
2 .01 uF disc capacitor [marked .01 or 103 or 10nF] (C1,2)
SEMICONDUCTORS
3 NPN transistors [marked 3904] (Q2,3,4)
1 PNP transistor [marked 221 334] (Q1)
7 Diodes [marked 1N4148] (D1,2,3,4,5,6,7)
MISCELLANEOUS PARTS AND HARDWARE
1 3.5mm Cable,Mike plug(P2)
1 2.5mm Cable,Remote plug (P1)
1 Telephone modular jack (J1)
2 Switch,DPST,pushbutton (S1,2)
1 TT1 printed circuit board