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Ham > HAM General > Flashcards

HAM General Flashcards

1
Q

Signal Separation

CW
SSB
RTTY
PSK 31

A

150-500 Hz
2.5-3 kHz (2500-300 Hz)
250-500 Hz
150-500 Hz

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2
Q

Split Frequency

A

Used with busy stations. Transmit on one; receive on the other.

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3
Q

Step Size or Step Rate

A

Minimum frequency change a tuner can manage.

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4
Q

Short Range Freqs vs Long Range Freqs

A

80 or 40 M for short (regional) range; use 10 - 30 M for long range.

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5
Q

Calling Codes

A

DE—From
DX—Distant; usually outside your country
BK—Break, as in, breaking in

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6
Q

DX Window

A

Band plans designate windows for long-distance contacts, for instance, 50.1-50.125 is for long distance contacts

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7
Q

60 M FCC Operating Requirements

A

FCC Requires a Log if you DONT use a dipole to track gain calculations; be below 100 W ERP

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8
Q

CW

A

Always on the low end of the HAM bands

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9
Q

SSB

A

3 kHz wide (AM is 6 kHZ)
USB above 9 MHz (20 - 10 M)
LSB on all others but 60 M

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10
Q

Free DV and AOR Equipment

A

Most common digital voice on HF. DV suffers less fading and less noise. Same size as SSB.

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11
Q

Digital Modes

A

FT8, PSK31 and PSK63, RTTY. PACTOR/WINMOR semi-auto transmission and small files. Transmit via SSB.

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12
Q

Selectivity vs Sensitivity

A

Discrimination (more important) vs Detection.
Preamps are not needed unless you’re on 10-15M

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13
Q

RST

A

Readability (1-5), Stength and Tone (1-5)
Tone on CW only
C = Chirp
Voice = use 5x5

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14
Q

Filters, RIT, XIT, recommended gain

A

Minimum one for SSB, one for CW, one for FM—necessary bc HF isn’t channelized.
RIT—changereceive not xmit
XIT—change xmit freq, not receive
Set min gain bc of preamps and filters

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15
Q

Vox

A

Vox gain— sensitivity to respond (no cw)
Vox delay-—how long keyed up
Anti vox—protects against speakers (no cw)

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16
Q

FAA Rules for antennas

A

-200 and more than 4 mi from airport

17
Q

 HF bands in megahertz and wavelength

A

1.8-3.5-7-14-21-28 MHz
300/f
160-80-40-20-15-10

18
Q

Third-party notes

A

Any message, written, spoken, relayed or, done by anyone for any duration who is not a licensed ham is third-party. Check the list in your phone. You may never be third party for someone whose license is revoked

19
Q

One Way transmissions

A

Code practice, weather, or propagation predictions occasionally

20
Q

Crossband be on your licensure

A

Only if the repeating station has a general class or better

21
Q

Maximum transmitter output power

A

1500 Watts Peak envelope power, called a full gallon.

Operating without an amplifier is called barefoot

30 m – – 200 W peak; 60 m dash – 100 W effective radiated power on a half dipole, and Max signal band width of 2.8 kHz

Maximum spread spectrum signal power is 10 W

22
Q

Linear amplifiers

A

Are used in single sideband AM operations to linearly amplifier signal

23
Q

Effective radiated power.

A

Transmitter power ( including amplifier) times antenna gain. 

24
Q

Symbol rate and bandwidth

A

Baud— How many symbols can be transmitted in a second; it is a lower on HF (300)

Bandwidth Dash how many kilohertz wide a data carrying symbol may be. It is around 1 kHz on the low bands; 20 on VHF; 100 on UHF; and no limit on microwave

25
Q

Frequency and harmonics

A

AC flowing, stopping, reversing, & stopping again.

Harmonics are the frequency at an integer multiple of the fundamental frequency.

26
Q

Series and parallel

A

Series circuits—amps are the same at each (all have same power), while voltage drops after each component

Parallel circuits—volts are the same across each component, but current is divided

27
Q

AC voltages are Vrms so…

A

Calculate components and the peak voltage is from that.

28
Q

PEP in FM and CW

A

Just use an averaging wattmeter. This is also true for an unmodulated AM signal

29
Q

Permeability

A

An inductor’s core’s ability to store magnetic energy

30
Q

Coupling

A

what happens when two in doctors share energy. The ability to do this is called mutual inductance. 

31
Q

Toroidal Winding

A

Contains the magnetic field to eliminate mutual inductance

32
Q

Increasing capacitance

A

Use larger surfaces, bring the services closer, or change the dielectric material

33
Q

Polarized capacitors

A

Tantalum and electrolytic capacitors

34
Q

Blocking, bypass, filter, suppressor, and tuning capacitors

A

Pass AC and block DC
Provide low impedance path for AC
Smooth voltage pulses of rectified AC voltage
Vary the frequency of resident circuits or adjust impedance

35
Q

Transformers

A

Use mutual inductance between different windings to change voltage characteristics

36
Q

Reactance

A

Resistance to AC flow caused by capacitance or inductance

37
Q

Capacitive reactance

A

Blocks DC current, resists low frequency AC, and passes high frequency AC

Ham (5 decks)

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