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Ham Radio 2000 #2
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Ham Radio 2000 - Volume 2.iso
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HAMV2
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EXAMS
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NVTECH
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TECH.HLP
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1995-03-09
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6KB
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246 lines
Location
Control point
610 to PA
Two years
Novice 15-meter
Technician plus is also authorized.
All
Pass Morse code test Element 1A, 1B or 1C
Antenna terminals
PEP
One hundred
Do not cause interference
Change frequency
Both operators have an equal right
CW
Above 50.1
Above 144.1
Amateur limit of 1500 watts
50 MHz is used for TV elsewere
Novice with CSCE equals Technician Plus not Technician.
To keep signals narrow frequency shift is limited below 50 MHz to 1KHz
No limit
The higher frequency - the faster symbol rate allowed and the wider bandwith allowed
A beacon station is used for the observation of propagation
Twenty WPM
English
Phonetics
Technician
Unrecommended repeater licensee
Both are responsible
Call, name and address
Power limit is 1 watt and a transmitter label is required. No ID required
Intended for the general public
None
Never
NASA
Third-party agreement or to a licensed ham
Continuously monitor
Essential communications
Special conditions
1 by 1
To allow access for emergencies
Call sign
Extend range
Talking too long
Swap and message nets
No need to save "Over"
Strong enough to blank receiver noise
Give relative quieting
Open
.6 MHz
1.6 MHz
Five MHz
At night the lower frequency HF signals travel world wide
Contact repeater owner
Use a nonradiating load - called a dummy antenna or a dummy load
QTH is a CW signal
Use repeater to make contact then go simplex to free it
Check the repeater input frequency but don't use it for simplex
Repeaters are usually on assigned frequencies
Recommends frequencies
Good to send QRL - You may not be able to hear both sides of a QSO
Conversation
QRZ?
1st digit is Readability 1 to 5 2nd digit is Strength from meter
Signal strength meters are marked 0 to 9 and in dB above 9
"MAYDAY" and call
Save Our Ship
Break
Civil defense
One
Drill
No need to remember who is where - ID still required every 10 minutes.
Welfare
Emergency
Power lines fall down during storms
Extra batteries
A dish could be used for collecting rain water
Outer atmosphere
HF waves are bent by the Ionosphere
UV from the sun
The "D"own low layer
E region
F2 region
F1 & F2
Absorbs
Ionization of D region
Ionization follows temperature
Goes thru
Darkest just before dawn
Highest frequency signal that will reach its destination
Scatter
Direct
Tropo
Extends range
Temperature inversion
Very High Frequency
High-pressure
Short skip on 10-meters
Chassis "G"round
Red and black are the HOT wires
"W"ithout fuse
Electrical Code
Answer is red and black. Black should go straight to battery
Color coded
The correct answer and the safe answer, is the smallest number
Heart
Reached easily
Take off all jewelry first
Tell family members where it is and how to shut off the power
Turn off the power - or pry the person away using broom handle
Parallel - across the circuit
Series resistance in probe lead
Series resistance is increased
Series
Add a parallel resistor, called a shunt, across the meter
Voltage etc.
At transmitter
Most ham equipment is 50 ohms
Power
90-10 = 80
96-4 = 92
A mark is a reference point
Reference points for tuning
A crystal produces a stable signal
WWV and WWVH
Signal generator
One use is aligning tuned circuits
Reflectometer
Close to the antenna feed point
May not be accurate
May be accurate
Nonradiating load
Noninductive resistor
Transmitter testing
100 is 100
Changes RF into heat
An S meter
Cooks it
Eyes
ANSI
Exposure limits
VHF - 30 to 300 MHz
The body absorbs RF at VHF
Most portables are about 5 watts
The shielding usually prevents radiation and aids in cooling
Resist means oppose
Inductance
The basic unit of inductance is the Henry
Capacitance
The basic unit of capacitance is the Farad
Twice
Half
Opposite of inductors - half
Twice
Voltage = Current times Resistance E = I x R
I = E / R
R = E / I
E = I x R
R = E / I, R = 12/.25, R = 48
R = E / I, R = 12/.15, R = 80
I = E / R, I = 120/4800, I = .025 A
I = E / R, I = 120/48000, I = .0025 A
I = E / R, I = 12/4800, I = .0025 A
I = E / R, I = 12/48000, I = .00025 A
Ohm's law
Wire-wound for high power
Its resistance is adjustable
Color code
Value, value, multiplier
Tolerance
Electrical energy is converted to heat
More power
+/- 10 ohms
Smallest
Largest
Core means central part
It is an electromagnetic device
In general, the more wire the higher the inductance
Increases
May not tune correctly
Has an arrow if adjustable
Pair of bars
Has a plus sign
Conductive plates
It is an electrostatic device
In general, the greater the area the more capacitance
Increases
Reduce harmonics
Band-pass
A detector
Variable Frequency Oscillator controlled transmitter
FM receiver
Reactance modulator
Test
CW
Radio TeleTYpe usually uses frequency shift keying
Data
Keyed audio tone
FM
SSB
Upper for above
Phase-modulated
MCW
RF carrier
Varying carrier to send info
Unmodulated
TNC to mic input
Good audio
CW is narrow - FM is wide
2 to 3 kHz
10 to 20 kHz for amateur service
Out-of-channel emissions are called splatter. You might also drop out of the repeater if your signal becomes too wide from over-deviation.
Overmodulation
One direction
A Yagi is constructed of parallel elements.
A Yagi antenna is a type of parasitic beam antenna.
A beam antenna must have at least one driven element.
Some elements receive energy by induction (radiation).
All elements are parasitic elements except the driven element(s).
Four-sided loops
Triangular elements
Ground plane
If the antenna is some-what centered on the vehicle, the power goes out in all horizontal directions
Polarization always refers to the electric lines
Perpendicular
Polarization is the same as element plane
Vertical
Voltages
To load
Returned from load
Radiated or lost as heat
One side grounded
BALanced - UNbalanced
PL-259 connector - called UHF
Bayonet Navy Connector
Type N
Low loss RG-213
Cut off the excess cable, leaving enough to service the equipment
Loss increases as length increases
For most HF and VHF feedlines, loss increases with increasing frequency
Lousy feed line
While A is true - safety is most important
Mount the antennas away from people and power lines
Keep losses down