This is the Extra Class math and electronics theory lecture page. This
lecture series is open to all Handiham members, but there
are some prerequisites that we would like you to complete first.
The latest Extra Class
Question Pool from the NCVEC
The
Extra Class Question Pool with only correct answers, in DAISY format. Download
& unzip, then play on computer using AMIS or put on your digital player.
Please go through the lectures in the correct order, following the links.
Here are some legacy links containing information about the lecture contents:
Extra
lecture 78 gets us into our final study area, safety. In this one, we talk about
the hazards of some common electrical materials, RF exposure, and station
evaluation.
Extra
lecture 77 delves into EME, meteor scatter, and auroral propagation.
Extra
lecture 76 is about HF & VHF propagation, including ground and sky waves.
Extra
lecture 75 is about antenna modeling software. It beats running outside and
climbing the tower a hundred times.
Extra
lecture 74 is about Smith Charts. Sorry, Mr. Jones.
Extra
lecture 73 is about transmission lines, including velocity factor.
Extra
lecture 72 covers impedance matching in antenna systems. This is useful stuff to
know, even after the exam!
Extra
lecture 71 is about satellite antennas, receiving loop antennas, and direction
finding antennas.
Extra
lecture 70 covers traveling wave antennas, phasing verticals, and ERP. Bonus! I
show you how to not have to work with logarithms to figure out ERP.
Extra lecture
69 is about antenna loading & traps.
Extra lecture
68 is about antenna efficiency.
Extra lecture
67 is about antenna basics.
Extra
Class lecture 66 on receiver dynamic range
Extra
Class lecture 65 on receiver selectivity
Extra
Class lecture 64 on receiver noise floor and signal to noise ratio
Extra
Class lecture 63 on amateur television and SSTV.
Extra Class lecture
62 on Spread Spectrum & error correction
Extra lecture 61 on digital modes.
Extra
Lecture 60 on digital codes & protocols.
Extra
lecture 59 on noise reduction and interference.
Extra
lecture 58 on pulse modulation & multiplexing.
Extra
lecture 57 on deviation ratio and modulation index.
Extra
lecture 56 on spectrum analyzers.
Extra
lecture 55 on the oscilloscope.
Extra lecture 54 on test
instruments.
Extra
Class lecture 53 on polarization and the difference between electrical and
magnetic fields.
Extra Class lecture 52 on
PEP, or Peak Envelope Power and calculating power of a modulated signal.
Extra
Class lecture 51 on AC measurements, including converting RMS to peak
Extra
Class lecture 50 on AC waveforms
Extra
Class lecture 49 on power supplies and regulators
Extra
Class lecture 48 on impedance matching
Extra
Class lecture 47 on active filters
Extra
Class lecture 46 on passive filters, including crystal filters.
Extra Class
lecture 45 on PLL and DDS, two methods of frequency synthesis.
Extra Class
lecture 44 on demodulation
Extra lecture
43,
which covers AM, SSB and FM modulation.
Here is
the correct link to lecture 42 on mixers.