Syllabus Kelas Kemahiran Radio Amatur

From K-ramat

Berikut adalah draft awal Kelas Kemahiran Radio Amatur yang bakal dianjurkan oleh pihak Kramat. Beberapa topik pengenalan asas kepada CW, APRS, Echolink juga akan diperkenalkan.

1. Regulatory Matters

The regulatory environment, The amateur radio license, who issues them, payment of fees Call signs, Power permitted, Emergency operation, Ciphers and secret codes.

2. Frequencies
Frequencies and bands allocated for amateur radio operating, Sharing of bands.

3. Electronics Fundamentals
Insulators, conductors and semiconductors, Fields produced by currents and magnets.
Units of voltage, current, resistance, impedance, Types of cells.

4. Measurement Units
Units of voltage, current, resistance, impedance, power.

5. Ohm's Law
Calculations involving voltage, current, resistance (using a single resistor).

6. Resistance
Values of resistors in series and parallel (using two resistors and more). Calculations involving resistor combinations, voltage, current, Internal resistance of cells.

7. Capacitors, Inductors, Resonance
Variation of capacitance with plate size, spacing, Dielectrics, Variation of inductance with diameter, length, number of turns (descriptive only), C and L in series and parallel,Impedance Transformers, turns ratios, voltage transformation.

8. Safety
Basic procedures for removing persons from live circuits, Action of a RCD (residual current device), fuse, Isolating transformer, Grounding, Color codes and names of mains wiring.

9. Semiconductors
Basic properties of semiconductor materials, Basic properties of diodes, Zener diodes,transistors. Recognition of electrode names of bi-polar transistors, FETs, valves.

10. Meters and Measuring
The basic function of voltmeters, ammeters, SWR bridges, power meters, the impedances
they present to circuits, how they should be connected, Peak and RMS values.

11. Decibels, Amplification and Attenuation
Power, voltage and current ratios expressed in dB, Gain in dB of systems connected in cascade.

12. An Amateur Radio Station
HF Station Arrangement, Understanding the block diagram of a typical HF station,
showing how a transceiver is connected to a linear amplifier, low pass filter, SWR
bridge, antenna switch, antenna tuner, dummy load and antenna, The basic function of
each block, Meaning of "SSB", "CW", "FM".

13. Power supplies
Cells. Mains input DC power supplies, Purpose of diodes, capacitors, transformers, Fullwave and halfwave rectification, ripple frequencies.

14. General Operating Procedures
Standard calling, answering, conversing procedures and conventions, Initiating and
terminating contacts, Callsign exchanges.

15. Q signals
Common Q signals used in Amateur Radio communications.

16. Antennas
Lengths of dipoles, verticals, for different frequencies, Impedances, Feed point position Matching, Antenna bandwidth, Elements of a yagi antenna, direction of radiation, E an H fields around antennas, Polarization, Tuning antennas with inductance, Balloons, Dummy antenna. Isotropic antenna.

17. Propagation
Basic phenomena in HF, VHF, UHF propagation, Layers which refract signals, D layer
absorption, Skip zones, hops, MUF, LUF, OWF, Solar cycle, Sky waves, ground waves.
Sporadic E, Great circle paths, radiation angles, Fading, Doppler caused by satellite motion.

18. Interference & filtering
Causes and recognition of cross modulation, Unwanted harmonics, Definitions of low-pass,band-pass, band-reject, notch and high-pass filters, Using filters for interference reduction

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