Technicians Handbook - Historic Naval Ships Association

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Alpha is always less than 1 for a common base configuration.TRANSISTOR RUGGEDNESS.—Transistors are generally more rugged mechanically thanelectron tubes. They are susceptible to damage by electrical overloads, heat, humidity, and radiation.Unless you are careful, damage can occur during maintenance.DAMAGE PREVENTION.—To prevent damage and avoid electrical shock, use the followingprecautions when working on transistorized equipment:• Check your test equipment and soldering irons for leakage current from the power source. Ifleakage current exists, use an isolation transformer to eliminate the current.1-34
• Connect a ground between the test equipment and circuit under test.• Do not exceed the maximum allowable voltages for circuit components and transistors.• Ohmmeter ranges that require more than one milliampere should not be used for testingtransistors.• Battery eliminators should not be used to furnish power for transistorized equipment. They havepoor voltage regulation.• The heat applied to a transistor, when soldered connections are required, should be kept to aminimum by the use of low-wattage soldering irons and heat shunts or heat sinks.• When replacing transistors, never pry them from the printed circuit board.• Check all circuits for defects before replacing transistors.• Remove power from the equipment prior to replacing a transistor.• Use extreme care when using test probes on a transistorized circuit. It is easy to short acrossadjacent terminals with conventional probes. Try insulating the probe tips and leaving a veryshort section of the point exposed.You can find more about transistors in NEETS, Module 7, Introduction to Solid-State Devices andPower Supplies.Vacuum TubesThe characteristics of a vacuum tube are measured by two factors: AMPLIFICATION FACTOR,mu (µ), and TRANSCONDUCTANCE (gm).Formula for amplification factor:Formula for transconductance (gm) is:Information on vacuum tubes can be found in NEETS, Module 6, Introduction to ElectronicEmission, Tubes, and Power Supplies.1-35
Page 1 and 2: SPECIAL PUBLICATIONSeptember 1998Na
Page 3 and 4: PREFACESpecial Publications (SPs) a
Page 5 and 6: TABLE OF CONTENTSCHAPTERPAGE1. The
Page 7 and 8: Module 11, Microwave Principles, ex
Page 9: Student CommentsCourse Title:NEETS
Page 12 and 13: • Be cautious when working in voi
Page 14 and 15: Electric ShockElectric shock may ca
Page 16 and 17: In this situation, the immediate ad
Page 18 and 19: Lean or rock forward with elbows lo
Page 20 and 21: possible) over the wound and firmly
Page 22 and 23: (1) NEAREST THE WOUND and (2) BETWE
Page 24 and 25: Shock• Be sure you draw the tourn
Page 26 and 27: Liquids should be administered spar
Page 28 and 29: drinks or stimulants. Get the victi
Page 30 and 31: Figure 1-11.—RC time constants.Fi
Page 32 and 33: Ac current formulas are:Ohm's law f
Page 34 and 35: Parallel inductors without coupling
Page 36 and 37: Another way to calculate reactive p
Page 38 and 39: ResistanceRESISTANCE is the opposit
Page 40 and 41: Since:Transformer power:1-30
Page 42 and 43: WARNINGRf voltages may be induced i
Page 46 and 47: WavelengthCAUTIONBecause vacuum tub
Page 48 and 49: Minimum radar range = (pulse width
Page 50 and 51: Log or dBGain or mw11 12.510 109 88
Page 52 and 53: Table 1-1.—CB Style Capacitor Par
Page 54 and 55: Table 1-3.—CYR10 Style Capacitor
Page 56 and 57: Figure 1-16.—Ceramic capacitor co
Page 58 and 59: Table 1-4.—Principal Applications
Page 60 and 61: Figure 1-18.—Resistor color code.
Page 62 and 63: MilitaryspecificationMIL-R-39005MIL
Page 64 and 65: Figure 1-19.—Color code for trans
Page 66 and 67: Figure 1-21.—Transistor lead iden
Page 68 and 69: numbers and part numbers can be fou
Page 70 and 71: SizeTable 1-10.—Current-Carrying
Page 72 and 73: Jan TypeOverallDiameter (ins)Table
Page 74 and 75: Table 1-13.—MS Connector Identifi
Page 76 and 77: Figure 1-23.—Insert arrangements
Page 78 and 79: Figure 1-25.—Typical BNC connecto
Page 80 and 81: Figure 1-28.—Attaching HN connect
Page 82 and 83: Table 1-16.—N Series Connectors w
Page 84 and 85: Insulation, Heat Shrinkable Sleevin
Page 86 and 87: Table 1-19.—Shrinkable Tubing Par
Page 88 and 89: Table 1-21.—New Style Military Fu
Page 90 and 91: Conversion and Equivalent TablesTab
Page 92 and 93: Table 1-24.—Conversion Chart—Co
Page 94 and 95:
Table 1-24.—Conversion Chart—Co
Page 96 and 97:
Figure 1-33.—Electrical symbols.
Page 98 and 99:
Figure 1-34.—Electronic/logic sym
Page 100 and 101:
Page 102 and 103:
Page 104 and 105:
Figure 1-35.—Fiber optic symbols.
Page 106 and 107:
Table 1-26.—Frequency Spectrum Us
Page 108 and 109:
Joint Electronic Type Designation S
Page 110 and 111:
Table 1-29.—Microcircuit Part Num
Page 112 and 113:
Table 1-29.—Microcircuit Part Num
Page 114 and 115:
CIRCUIT53MC54MC55MC56MC57MC58MC59MC
Page 116 and 117:
CIRCUITQAQDQXRARDRW4SNSPTD1TD2TD5TD
Page 118 and 119:
CIRCUIT4JZ5JZ6JZ7JZ8JZ9JZ10JZ11JZTa
Page 120 and 121:
CIRCUITX29JX34JX40JX41JX42JX43JX44J
Page 122 and 123:
Table 1-34.—Common LogarithmsN 0
Page 124 and 125:
Table 1-35.─Trigonometric Functio
Page 126 and 127:
Page 128 and 129:
Page 130 and 131:
Table 1-36.—Julian Date CalendarD
Page 132 and 133:
Table 1-38.—Effects of Heat and H
Page 134 and 135:
Table 1-40.—Old and New Specifica
Page 136 and 137:
Remember to use the proper safety p
Page 138 and 139:
Figure 1-38.—Computation of phase
Page 140 and 141:
Figure 1-40.—Lissajous patterns f
Page 142 and 143:
Figure 1-42.—Octopus schematic di
Page 144 and 145:
Figure 1-46.—Combination displays
Page 146 and 147:
• A military alteration that chan
Page 148 and 149:
numbers. They can be easily convert
Page 150 and 151:
support equipment. All aircraft equ
Page 152 and 153:
Publications and DocumentsVarious p
Page 154 and 155:
REFERENCESAfloat Shopping Guide, NA
Page 156:
NEETS, Module 9, Introduction to Wa
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Technicians Handbook - Historic Naval Ships Association

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