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66 Cards in this Set

  • Front
  • Back
What is the minimum bend radius for flexible coax cables? When subject to repeated flex?
10 times the cables diameter/ 20 times
What is the minimum resistance between the conductors of a multi-conductor cable?
50,000 ohms
What are Waveguides made of?
Drawn aluminum, bronze, copper or silver tubing
Waveguides come in pre-bent pieces at what angles?
45, 60, 90
Who manufatures Heliax Cable?
Andrew Corporation
Elliptical Waveguide is a kind of _______.
Heliax Cable
For all objects that a waveguide is not connected to requires a ____ inch clearance.
2 inch
Waveguide/ Rigid Coax supports shall never exceed ____ distance apart.
5 ft.
Waveguides that exceed ___ inches shall have ___ supports.
24 inches
2 supports
Tighten the clamping bar screws to ensure a minimum gap of ___ inch exists
between the clamp support and clamp saddles.
1/16
T/F
It is permissable to store flexible cable by hanging it from a hook/dowel etc.
F
T/F
It is permissble to use block and tackle or other mechanical devices to pull flexible cable.
F
Coaxial Cables installed on masts within the beam pattern of radars that operate at ____Mhz to ____Mhz shall be ______.
200-450Mhz
properly shielded
Coxial Cables should show an insulation resistance of ____ at 100ft or less.
200ft?
500ft?
1000ft?
40000 Mohm=100ft
20000 Mohm=200ft
8000 Mohm=500ft
4000 Mohm=1000ft
exactly proportionate
T/F
Cables crossing expansion joints must have slack equal to at least twice the maximum movement of the expansion joint.
F
atleast equal to the max expansion
What side of beams or other supports structure should coax cable be routed? Why?
In-board
Battle Protection
Radar, radio, antenna, sonar transducers should be separated from all other cables by ____ inches.
Sonar Hydrophone?
18 inches
6 inches
What does a cable tag starting with R-A mean?
Meterological Equipment
What does a cable tag starting with R-B mean?
Beacons
What does a cable tag starting with R-C mean?
Countermeasures
What does a cable tag starting with R-D mean?
Data
What does a cable tag starting with R-E mean?
Radar
What does a cable tag starting with R-EA mean?
Air Search Radar
What does a cable tag starting with R-ES mean?
Surface Search Radar
What does a cable tag starting with R-F mean?
Weapon Control
What does a cable tag starting with R-G mean?
Telemetering or remote control electronics guidance
What does a cable tag starting with R-H mean?
CW Passive Tracking
What does a cable tag starting with R-I mean?
IFF
What does a cable tag starting with R-K mean?
Timing
What does a cable tag starting with R-L mean?
Automatic Vectoring
What does a cable tag starting with R-M mean?
Missile Support
What does a cable tag starting with R-N mean?
IR equipment
What does a cable tag starting with R-O mean?
Optical
What does a cable tag starting with R-P mean?
Special purpose
What does a cable tag starting with R-R mean?
Radio Comms.
What does a cable tag starting with R-S mean?
Sonar
What does a cable tag starting with R-T mean?
Television
T/F
On terminal blocks more than one conductor can be crimped into one terminal lug.
F
When weather proofing/coax cable repair how many coats of liquid plastic are required?
3
T/F
Flexible waveguide assemblies can be used for bends.
F
only to compensate for excess stress from expansion or vibration
How shall twist assembly waveguides be fabricated?
not exceed 90degrees of twist
and length is an integral multiple of half of the wavelength of the nominal freq.
T/F
Two "E" or "H" waveguide bends can be connected.
F
unless no other arrangement is possible
What must be done to a waveguide before it can be bent?
Annealed
(chemically softened)
In waveguides running parallel to each other flanges(connections) shall be spaced ___ inches apart?
6 inches
What can be used as a waveguide template?
1/2 inch pipe
Exluding bends twists and offsets; what is the deviation on a straight run of a waveguide?
1/4 inch
What size does rigid coax come in?
3/8 - 6 1/8 inch diameter
20ft lengths
What type of elbow pieces are available for rigid coax?
T/F
It is permissable to use a different size elbow.
90 and 45 degree mitered
F
What is the maximum size of elliptical waveguide availible in spools? What is the designator for the most common larger elliptacl waveguide and what lengths do they come?
RG-395/U
RG-387/U 20ft lengt
What does a cable tag that ends with /Q signify?
"red" cables
What does a cable tag that ends with /T signify?
Automatic Test Equipment
What does a cable tag that ends with /E signify?
Experimental Circuit
What does VSWR stand for?
Voltage Standing Wave Ratio
What is the minimum insulation resistance values for cable with circular mil fare of less than 1700.
50,000ohms
Waveguids are normally supplied in what lengths?
10-14ft Sections
What is annealing? When do you do it?
Softening a waveguide prior to bending.
What is the maximum bow for an installed waveguide?
.010 inch edgewise and .020 inch flatwise between two points @ two feet apart.
What can you make waveguide tmeplates out of
1/2 inch pipe
Waveguide supports should be no closer than ___ to flange connections.
6 Inches
What are the three waveguide/ waveguide support isolation methods?
a) Coat with 1/16 inch vinyl plastic (PLASTISOL) (WOULD DAMAGE WAVEGUIDE)
b) 3/16 inch Neoprene Class 11, Grade 30
c) Use sealer putty and plastic tape
When purging Waveguides how long shall they be Pressurized how long should they be bled?
2 hours
2hours
What VSWR should be corrected in transmission lines if no other guidance is offered.
1.25:1
Can rigid COAX be reduced from 6-1/8 inch to 3/8?
Yes but only one size at a time. (6-1/8 to 3-1/8) (3-1/8 to 1-5/8) (1-5/8 to 7/8) (7/8 to 3/8)
Can Steel wool or Emery paper be used in electronic equipment?
NO
What size should a 2M work station be?
24"x30"
What is the goal for failed CCA repair by the 2M station?
80%