| CHAPTER |
SUBJECT |
| 1 |
Introduction
What NDBs are, and where they are used. |
| 2 |
The Spurious Response Problem
Receiver problems, overload cures, commercial
filters, homebrew filters, external rectification, miscellaneous
external causes. |
| 3 |
Man-Made Noise (Part 1)
Offensive Strategy -- TV oscillator
interference; broadband power line noise; the politics of RF
pollution. |
| 4 |
Man-Made Noise (Part 2)
Mechanically Steered Nulling -- The
directionality of power line noise; tuned loops; untuned loops;
other movable antennas. |
| 5 |
Man-Made Noise (Part 3)
Electrically Steered Nulling -- Phasing by
reactance; phasing by rotating coils; nulling procedure; noise
bridges. |
| 6 |
Man-Made Noise (Part 4)
Blankers and RF Wrapup -- Synchronous blankers;
natural noise; limiters; further antenna considerations; receiver
noise, gain, and preamps. |
| 7 |
The Frequency Domain (Part 1)
Modulation and Pitch -- Frequency assignments;
modulation; pitch. |
| 8 |
The Frequency Domain (Part 2)
QRM, Frequency Clusters and Selectivity --
Sidebands; cluster spread; IF selectivity; AGC and BFO requirements;
bandpass audio filtering; notch filtering. |
| 9 |
The Frequency Domain (Part 3)
Frequency Measurement and Defects -- Coarsely
calibrated receivers; closely calibrated receivers; external
frequency-measurement apparatus; beacon defects in the frequency
domain, including negative keying. |
| 10 |
Beacons On The Road
Portable receivers; mobile and temporary
receiving antennas; loops and direction finding. |
| 11 |
Visiting Beacon Sites
How to find them; beacon antenna
configurations. |
| 12 |
The Time Domain (Part 1)
Idents and Formats -- the Morse code; NDB
identifiers; ident problems; formats in different countries.
|
