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A free online calculator for making all of the calculations required to design and build small transmitting loop antennas, also known as magnetic loops by 66pacific.com

Java script antenna calculators for ground planes, half wave verticals, quad antenna, 5/8th wave vertical antenna, dipole and inverted vee antennas

LCF online Calculator, calculate relation between Frequency Capacitance Inductance and Reactance

Online calculators for toroid coil, air-core coil inductance, XL, XC, and more.

Build an effective dipole antenna that needs much less space by adding two loading coils. This online calculator tells you how.

Use this online calculator to determine the length of a quarter-wave antenna from the frequency. Both metric and English units of measurement are supported.

Use this online calculator to determine the length of a full-wave loop antenna from the frequency. Both metric and English units of measurement are supported. Quarter-wave matching section lengths are also calculated.

Use this online calculator to determine the length of a dipole antenna from the frequency. Both metric and English units of measurement are supported.

This article includes an online calculator for a 3 element Yagi Antenna. The formula and basics theory of Yagi Antenna are also explained with examples.

Electrical and electronics online calculators by Calculatoredge.com

Select the toroid by material type and dimension of the toroid, the desired inductance and you will get the numbers of turns

Basic priciples of Yagi antennas and its variations like Quagi antennas, Quad antennas includes pictures, drawings and online calculators by KN9B

Mic online calculator , Microphone Dynamic Range Calculator, Microphone Sensitivity Calculator

You can shorten a vertical antenna by using a loading coil. This online calculator tells you how the amout of inductance your loading coil will need to have.

RF Feedline (Coax and Ladder-Line) Loss and ERP Calculators made with Javascript. This complex feddline loss calculator has already several line types paramenters for most common coaxial cables from Belden, Time LMR, Wireman and other common products. Result will give Matches loss, SWR loss, dB and Watts power loss.

An online calculator for designing and evaluating capacitors based on the capacitor's area, separation, number, and dielectric constant

Coil64 (Coil32) is a versatile tool for calculating single-layer inductance coils used in various electronics, such as matching circuits and amplifiers. The online calculator enables users to estimate the number of turns, winding dimensions, and select the appropriate wire type for home-brewed RF inductors. It employs Bob Weaver's equation, factoring in wire corrections, and allows for the calculation of Q-factor and self-capacitance. Coil64 is compatible across multiple platforms, including Windows, Linux, Mac-OS, and Android.

This online calculator will return the inductance of a coil. It will ask you the total number of turns, the total diameter of the coil and its lenght, from the first winding to the last. Obtaining the correct inductance in winding a coil can be easy if you already know how many turns are needed. Available in inched and centimeters,

A 5/8 λ antenna, often thought to be ideal for all frequencies, has unique characteristics that don't universally apply. First introduced for medium-wave radio, it works optimally at 225° antenna length over ideal ground, yielding high efficiency. However, at VHF and higher frequencies, it offers no advantage over other antennas due to real ground conditions and complex matching requirements. DIY calculators provide only rough estimates, useful as a starting point for simulations, not for precise builds.

An online inductive reactance calculator, accepts as input Frequency and Inductance

Online impedance calculators grouped by types like Wire inductances, Toroid incuctances, Plane, PAD, Strap inductances, but even Core and Coax Inductances. Air core inductances and mutual inductance groups are also availbale. All these calculators let you input specific paramenters based on the inductor selected and will calculate specific incutance and related dimensions.

Online Coil Inductance Calculator. To calculate the inductance of a single-layer, air-core coil, just select the measurement units, enter the number of turns, the coil diameter and the coil length.

The N5KWD website, maintained by David C. Taylor, presents a personal station page for an Extra Class amateur radio operator. It serves as a digital logbook and resource hub, offering insights into his on-air activities and technical pursuits. Visitors can find a **ham radio journal** detailing operating experiences, along with current news relevant to the amateur community. Beyond personal updates, the site incorporates practical tools such as online calculators for various radio applications and calendars for upcoming events like contests or hamfests. This blend of personal narrative and utility reflects a common approach among hams sharing their passion and knowledge. Furthermore, the platform showcases several **amateur radio projects**, providing details on construction, modifications, or experiments undertaken by N5KWD. This content appeals to those interested in homebrewing and technical aspects of the hobby, offering inspiration and practical examples.