Technicians Handbook - Historic Naval Ships Association
Technicians Handbook - Historic Naval Ships Association Technicians Handbook - Historic Naval Ships Association
WavelengthCAUTIONBecause vacuum tubes become hot and most are made of glass, use cautionwhile removing or replacing them. Use vacuum tube pullers or at least wear sometype of hand protection.Wavelength is the distance in space occupied by one cycle of a radio wave at any given instant. If aradio wave could be frozen in time and measured, the distance from the leading edge of one cycle to theleading edge of the next cycle would be the wavelength. Wavelength varies from a few hundredths of aninch at the high frequencies to many miles at extremely low frequencies. Common practice is to expresswavelength in meters. The Greek letter lambda (λ) is used to signify wavelength. Formulas forwavelength, period, and velocity are shown below.Wavelength formula:Frequency formula:You can find more information on wavelength, frequency, period, and velocity in NEETS, Module10, Introduction to Wave Propagation, Transmission Lines, and Antennas.1-36
RadarSome helpful radar information/formulas are shown below.PWPulse Width—The width of the transmitted RF pulse from the radar(the term can also be used regarding other non-RF information).PRTPulse Repetition Time—The duration of the time between radartransmitter pulses (leading edge of pulse to leading edge of the nextpulse).PRR orPRFPRF Pulse Repetition Rate or Pulse Repetition Frequency—thenumber of pulses that occur during one second.DCDuty Cycle—The amount of actual transmitter pulse time (PW)divided by the amount of transmitter total time (PRT). For radarapplications, the duty cycle will always be less than one.P pkPower Peak (normally referenced in kilowatts)—The actual power ofthe transmitted RF pulse (PW).P avgAverage Power (normally referenced in watts)—The transmittedpower relative to one PRT.1-37
- 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 44 and 45: Alpha is always less than 1 for a c
- 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
RadarSome helpful radar information/formulas are shown below.PWPulse Width—The width of the transmitted RF pulse from the radar(the term can also be used regarding other non-RF information).PRTPulse Repetition Time—The duration of the time between radartransmitter pulses (leading edge of pulse to leading edge of the nextpulse).PRR orPRFPRF Pulse Repetition Rate or Pulse Repetition Frequency—thenumber of pulses that occur during one second.DCDuty Cycle—The amount of actual transmitter pulse time (PW)divided by the amount of transmitter total time (PRT). For radarapplications, the duty cycle will always be less than one.P pkPower Peak (normally referenced in kilowatts)—The actual power ofthe transmitted RF pulse (PW).P avgAverage Power (normally referenced in watts)—The transmittedpower relative to one PRT.1-37
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