Masters Communications DRA-MIX-MUX Parts List

(Parts is parentheses are REV1)
[Parts in brackets are REV2]


U1 - TL074CN - Integrated Circuit
(U2) - LM78L33 - 3.3V Voltage Regulator
[U2] - LM78L05 - 5.0V Voltage Regulator

1 - 14 pin IC Socket - Machine Type

D1 - 1N4004 Diode
D2 - BAT43 Diode
D3 - BAT43 Diode
D4 - BAT43 Diode
[D5] - 1N4148 Diode (incorrectly also marked D3
D5 is the diode directly beside RY1 (relay)

LED1 - RED LED 3MM  (long lead goes in the round hole)
LED2 - Green LED 3MM (long lead goes in the round hole)

Q1 - 2N2907 PNP Transistor
Q2 - 2N2222 NPN Transistor

[RY1] - 1A05 5V relay (black)
The relay can be installed either way, but you may want to put the printing
to the outside so you can read it.

SC1, SC2, and RADIO Connectors - Mini-DIN-6 Female Chassis Connector (Optional)

P1 - 2 pin MOLEX power header w/female socket housing and (3) spring-pins

All resistors 1/4 watt

R1 - 1k
R2 - 1k
R3 - 10k
R4 - 10k
R5 - 10k
R6 - 10k
R7 - 10k
R8 - 10k
R9 - 10k
R10 - 10k
R11 - 10k
R12 - 10k
R13 - 10k
R14 - 10k
R15 - 10k
R16 - 10k
R17 - 10k

C1 - 10uF 16-25V Electrolytic (Observe Polarity) (long lead goes in the square hole)
C2 - (104) .1uF ceramic MLCC .1 LS
C3 - 47pF ceramic MLCC .1 LS
C4 - 10uF 16-25V Electrolytic (Observe Polarity) (long lead goes in the square hole)
C5 - (104) .1uF ceramic MLCC .1 LS
C6 - 10uF 25V Non-Polarized Electrolytic (NP or BP)
C7 - 10uF 25V Non-Polarized Electrolytic (NP or BP)
C8 - 10uF 25V Non-Polarized Electrolytic (NP or BP)
C9 - 10uF 25V Non-Polarized Electrolytic (NP or BP)
C10 - 10uF 25V Non-Polarized Electrolytic (NP or BP)
C11 - 10uF 25V Non-Polarized Electrolytic (NP or BP)
C12 - 10uF 25V Non-Polarized Electrolytic (NP or BP)
C13 - 10uF 25V Non-Polarized Electrolytic (NP or BP)
C14 - 47pF ceramic MLCC .1 LS
C15 - (104) .1uF ceramic MLCC .1 LS
C16 - (104) .1uF ceramic MLCC .1 LS


JU1 - 3 pin header yellow w/short
JU2 - 3 pin header green w/short
JU3 - 3 pin header blue w/short

Z1 - Circuit Trace Fuse - can be renewed with a piece of #30 wire.
.1 LS = Point 1 Inch Component Lead Spacing
MLCC = Mulit-Layer Ceramic Capacitor
NP or BP capacitors can be installed without regard to orientation.

1 - DRA-MIX-MUX Printed Circuit Board (REV1)
1 - DRA-MIX-MUX Printed Circuit Board [REV2]