HAM General

Question 1

Signal Separation

CW
SSB
RTTY
PSK 31

Answer 1

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

Question 2

Split Frequency

Answer 2

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

Question 3

Step Size or Step Rate

Answer 3

Minimum frequency change a tuner can manage.

Question 4

Short Range Freqs vs Long Range Freqs

Answer 4

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

Question 5

Calling Codes

Answer 5

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

Question 6

DX Window

Answer 6

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

Question 7

60 M FCC Operating Requirements

Answer 7

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

Question 8

CW

Answer 8

Always on the low end of the HAM bands

Question 9

SSB

Answer 9

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

Question 10

Free DV and AOR Equipment

Answer 10

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

Question 11

Digital Modes

Answer 11

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

Question 12

Selectivity vs Sensitivity

Answer 12

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

Question 13

RST

Answer 13

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

Question 14

Filters, RIT, XIT, recommended gain

Answer 14

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

Question 15

Vox

Answer 15

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

Question 16

FAA Rules for antennas

Answer 16

-200 and more than 4 mi from airport

Question 17

 HF bands in megahertz and wavelength

Answer 17

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

Question 18

Third-party notes

Answer 18

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

Question 19

One Way transmissions

Answer 19

Code practice, weather, or propagation predictions occasionally

Question 20

Crossband be on your licensure

Answer 20

Only if the repeating station has a general class or better

Question 21

Maximum transmitter output power

Answer 21

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

Question 22

Linear amplifiers

Answer 22

Are used in single sideband AM operations to linearly amplifier signal

Question 23

Effective radiated power.

Answer 23

Transmitter power ( including amplifier) times antenna gain. 

Question 24

Symbol rate and bandwidth

Answer 24

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

Question 25

Frequency and harmonics

Answer 25

AC flowing, stopping, reversing, & stopping again. Harmonics are the frequency at an integer multiple of the fundamental frequency.

Question 26

Series and parallel

Answer 26

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

Question 27

AC voltages are Vrms so…

Answer 27

Calculate components and the peak voltage is from that.

Question 28

PEP in FM and CW

Answer 28

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

Question 29

Permeability

Answer 29

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

Question 30

Coupling

Answer 30

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

Question 31

Toroidal Winding

Answer 31

Contains the magnetic field to eliminate mutual inductance

Question 32

Increasing capacitance

Answer 32

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

Question 33

Polarized capacitors

Answer 33

Tantalum and electrolytic capacitors

Question 34

Blocking, bypass, filter, suppressor, and tuning capacitors

Answer 34

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

Question 35

Transformers

Answer 35

Use mutual inductance between different windings to change voltage characteristics

Question 36

Reactance

Answer 36

Resistance to AC flow caused by capacitance or inductance

Question 37

Capacitive reactance

Answer 37

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