Highfields Amateur Radio Club
Constructors Corner.

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Index Page.
Hopefully this area will continue to grow. Your input would be appreciated.

Disclaimer: Brian Perrett, MW0GKX, can not be held responsible for any circuits, projects or other data submitted here. All information is hosted in good faith and, where possible, checked for accuracy, but this is no guarantee.

NEW! or UPDATED! over a heading shows where new or updated items are.

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Some of the items listed require Java enabled browsers, these are marked with (J).

NEW! & UPDATED! Content

Microphone Wiring Index Page. 		Includes:
Amateur Radios
CB Radios
Microphone Cable colours



General Info, Hints & Tips,
Warnings etc.

General Information:
  • 1964 Transistor Data.
  • About Meters.
  • Component Recognition.
  • De coding Capacitors.
  • De coding Resistors.
  • Desoldering Guide.
  • Fuses, What and Why.
  • Reading Diode & Transistor Markings.
  • Reading Schematic Diagrams, Beginners Tutorial.
  • Service Valve Equivalents.
  • Soldering Guide.
  • Tap Guide.
  • Tap Hole Size.
  • Wire Gauges and Comparision Table.
  • A video of F2FO making valves at home!
Hints & Tips:
  • Coaxial connectors maximum frequency use Chart.
  • Protecting outdoor connections etc with Silicone Grease.
  • TVI Flow Chart.
  • TVI Flow Chart (J).
Warnings & Precautions:
  • Electrostatic Discharge & Precautions.
  • Fake Electronic Components.
  • Solder Flux (Rosin) Precautions.
  • Warning Symbols.
 



Calculators & Connverters.

Antenna Calculators:
  • Coax Length Calculator (J).
  • Coax Loss Calculator & Comparison.(J).
  • Simple Dipole Frequency to Length Calculator (J).
  • J-Pole Frequency to Dimensions Calculator (J).
  • Quad-beam Calculator (J).
Capacitor Related Calculators & Converters:
  • Capacitance Unit Converter (J).
  • Capacitor 3 Digit Code Decoder (J).
  • Capacitor Charge / Energy Calculator (J).
  • Capacitor / Inductor Resonance. (J)
  • Capacitor Reactance.
  • Series / Parallel Calculator (J).
Inductor Related Calculators & Converters:
  • Inductor / Capacitor Resonance. (J)
  • Inductor Code Converters (Colours to Value and Value to Colours) (J).
  • Inductor Reactance.
Resistor Related Calculators & Converters:
  • 4 & 5 -Band Resistor Code Converters (Colours to Value and Value to Colours) (J).
  • Closest Standard Value Availability. (J)
  • LED Series Resistor (J).
  • Potential Divider (J).
  • Series / Parallel (J).
Other Calculators & Converters:
  • Battery Usable Life. (J)
  • Capacitor / Frequency / Inductor. (J)
  • Heatsink evaluation and calculation.
  • Ohms Law (J).
  • Pi Attenuator (J).
  • Voltage Drop in a wire (J).
 


Projects.

Antenna Projects:
  • 2 Metre DF.
  • Dummy Load.
  • Fitting Co-ax Plugs.
  • Ionic Fluid Antenna.
  • J-pole.
  • Slim Jims.
  • Stealth Directional Antenna for Top Band.
Circuit Projects:
  • RF Detection Probe.
  • RF Sampler.
Other Projects:
  • Alinco cloning cables.
  • Duplex type battery from a camera battery.
  • FT-817 battery (FNB-72).
  • FNB-59 or 79 battery.
  • OPC-474 cloning cable.
  • OPC-1529R data cable.
  • Remote Head Lead from PC network cable.
  • Yaesu cloning cables.

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