General Electronics

• Terminology Glossary British to American Electronics Terminology Glossary This short glossary of electronics-related British terms may assist Americans reading documents written in Great Britain.
• Coax Tune A Coaxial Line Used as a Tuned Circuit At HF and above, with a short circuit at one end, a 1/4-wavelength coaxial line can be used as a tuned circuit with a fairly high Q. With a variable capacitor across the open end an adjustable parallel tuned circuit results ...
• Coils, Single-Layer Cylindrical, Single-Layer, Air-Cored Coils of Various Proportions This program assists with design of single-layer coils having a wide range of proportions, from single-turn loops, through close-wound solenoidal forms, to coarse helices of thin wire ...
  
  
  • Coils, Single-Layer Page 2 Computed self-resonant frequencies are generally accurate to within +/-7 percent and can be used in the design of short, helical, dipole antennas such as the "slinky" in addition to the program's more serious uses ...
• Coils, Multi-Layer Air-Cored Multi-Layer Coils for Non-Critical Applications A coil is specified by inside diameter, outside diameter, axial length and number of turns. Turns disposition does not have a great effect on performance. Highest test frequency accepted is 3000 KHz ...
• Crystal Set Transmitter + Receiving Antenna + Selective Crystal Set or Radio Receivers This 'crystal' receiver uses two loosely-coupled tuned circuits. The circuit may also be used as a preselector in front of an untuned receiver. The load can be matched to L2 and C2 by changing the coil tap. ...
• Harmonic Generator A Single Transistor Harmonic Generator A sinewave drives the transistor via a coupling capacitor and resistor. Operating angle is set by input amplitude and resistor value. The collector load is either a resistor or an LC circuit tuned to a particular harmonic ...
• Matching Pads Resistive Matching-Pads & Attenuators For given source and load resistances and required attenuation this program calculates the resistor values of T and Pi networks and minimum-loss pads ...
• Oscillator Tracking Superheterodyne Receivers - Tracking & Alignment of Tuned Circuits The RF and local oscillator tuning capacitors are mechanically coupled on the same shaft and have the same capacitance/rotation law. As the shaft is rotated both circuits increase and decrease together in frequency. ...
• Parallel LC Analysis of Parallel LC Tuned Circuit - Q of Both L and C Included This program analyses the behaviour of a parallel L & C tuned circuit. Loss in both components is taken into account by a resistance in series with L and C ...
• Resistors & Coils Frequency Response of Wire-End Resistors and Small VHF Choke Coils L and C values are estimated from the component's dimensions. The program calculates input impedance, Zin, versus frequency with the other end grounded. Behaviour is analysed as a radio transmitter's RF dummy load ...
• RF Circuit Assistant RF Circuit Assistant is a small program written using the .NET 3.5 framework that allows one to perform many of  the calculations necessary for designing both transistor and tube based receivers and transmitters ...
• Toroid Inductors Inductors Wound on Magnetic-Cored Rings, Slugs, Tubes and Sleeves Core shapes may generally be described as cylindrical with a hole through the centre. When the length of the cylinder is long compared with its diameter we have a tube or sleeve ...
• Twin Tune Balanced-Twin Transmission Lines Used as Tuned Circuits At VHF and above with a short circuit at one end, a 1/4-wave balanced-twin line can be used as a tuned circuit with a high Q ...
• Two Coils Two Single-Layer Magnetically-Coupled Solenoids Pairs of coupled coils appear in RF power amplifier tanks, interstage transformers, unbalanced-to-balanced Z-matching networks and receiver preselectors ...
• Wire Skin Resistance Wire Resistance vs. Frequency and Temperature Calculate skin resistance vs. frequency for a single wire, an open-wire line, and a dipole antenna ...