LUDLUM MODEL 3 User Manual

Model 3 Technical Manual Section 10
Ludlum Measurements, Inc. Page 10-2 April 2016
Reference Description Part Number
Q1 MMBT3904LT1 05-5841
Q2 MMBT4403LT1 05-5842
U1-U3 MAX4542ESA 06-6453
U4-U5 CMXT3904 05-5888
U6 CMXT3906 05-5890
U7 MAX4541ESA 06-6452
U8 MAX985EUK-T 06-6459
U9 CD74HC4538M 06-6297
U10 LMC7111BIM5X 06-6410
U11 LT1304CS8-5 06-6434
U12 MIC1557BM5 06-6457
U13 LT1304CS8 06-6394
CR1 CMPD2005S 07-6468
CR2 RECTIFIER CMSH1-40M 07-6411
CR3-CR7 CMPD2005S 07-6468
CR9 RECTIFIER CMSH1-40M 07-6411
SW1 D5G0206S-9802 08-6761
SW2 TP11LTCQE 08-6770
SW3-SW4 7101SDCQE 08-6781
R33 250K, 64W254, ×100 09-6819
R34 250K, 64W254, ×10 09-6819
R35 500K, 64W504, ×1 09-6850
R36 250K, 64W254, ×0.1 09-6819
R42 1.2M, 3296W, HV 09-6814
R1-R5 200K, 1/8W, 1% 12-7992
R6 8.25K, 1/8W, 1% 12-7838
R7 10K, 1/8W, 1% 12-7839
R8 2.37K, 1/8W, 1% 12-7861
R9-R11 10K, 1/8W, 1% 12-7839
R12 200 Ohm, 1/8W, 1% 12-7846
R13 10K, 1/8W, 1% 12-7839
R14 4.75K, 1/8W, 1% 12-7858
TRANSISTORS
INTEGRATED
CIRCUITS
DIODES
SWITCHES
POTENTIOMETERS /
TRIMMERS
RESISTORS

LUDLUM MODEL 3 Specifications

General

Detector Compatibility	scintillation detectors
Power Source	Two D-cell batteries
Display	Analog meter
Audio	Built-in speaker
Operating Temperature	-20°C to 50°C (-4°F to 122°F)
Energy Range	Depends on detector
Accuracy	±10%