coil ferrite calculator

Center-Fed Wire Dipole Antenna Tuning Calculator - Ever need a way to estimate the amount of wire to add to or remove from a center-fed wire dipole antenna to achieve resonance at a desired frequency? This article help to determine correct wire lenght.

How to Build a UN-UN - Building a 1:1 balun, aka un-un, with an Amidon Ferrite toroid core T 200

Matching Coil Adjustment - There is a specific procedure which must be followed if proper adjustment of a shunt matching coil is to be achieved.

Loading Coils for 136 kHz - This page starts by showing how to make loading coils for LF, and goes on to describe two of the loading coil assemblies used to resonate the experimental vertical antenna used at GW4ALG.

The Short Dipole Using Coils  ^new - A very popular method of making a short dipoles resonate at a given frequency. This type of antenna is suitable for single band, narrow bandwidth use.

Quad Antenna Calculator  ^updated - An online quad antenna calculator for a 2 3 4 elements quad

HA8TKS VHF DXCluster - VHF and Up DX-cluster with map mash-up includes list, HAM tools, QRB calculator by HA8TKS

HA8TKS Tibor Priority listing - HA8TKS website dedicated to amateur radio VHF DXing include a dx-cluster map & list, HAM tools, QRB calculator and personal statistics

RF Calculators - A collection of calculators from everything RF for various applications VSWR, attenuator resistance valies, microstrip, coax, unit conversions and many more.

Single-layer Coil Inductance and Q Calculator - This calculator ask as input diameter, lenght turn and frequencu and will return L and Q

Resistor calculator - This resistor calculation tool shows which combinations of two resistors, series or parallel, gives a match better than the closest standard value.

Variometer Design - Online variometer calculator by IN3OTD

Highpass filter calculator - Butterworth Highpass Filter Designer

Winding coils - winding coils for construction project

Grip Dip Oscillator - Originally eveloped by I1FLC, uses seven plug in coils covering 3.0 to 30Mhz in a Colpitts oscillator circuit.