attenuator calculator

HB9CV antenna calculator - Calculate dimension for HB9CV directional antennas

Yagi UDA Calculator - Online Yagi Uda antenna calculator

Helix Antenna Calculator  ^updated - Online helix antenna designer, calculate size of helix antennas online

Discone Antenna Calculator - Calculate dimension for discone antennas online

Log Periodic Antenna Calculator  ^updated - Online calculator for Logarithmic Periodic Dipole Antenna LPDA

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.

HF Helical Whip Calculator - Calculating HF helical whip antenna for mobile or portable operation

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

BiQuad Antenna calculator  ^updated - Online calculator for Bi-Quad antennas

Cantenna Calculator  ^updated - Online calculator for Cantenna special antenna for 802.11 Wi-Fi bands

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

Magnetic Loop Software - Loop Calculator and Capacitor Design Software

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

Microphone sensivity calculators - Mic online calculator , Microphone Dynamic Range Calculator, Microphone Sensitivity Calculator

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

Notch Filter Designer - Online calculator, Butterworth Bandstop (Notch) Filter Designer

Constant k Lowpass Filter Design - Online Constant - k Lowpass Filter calculator

Highpass filter calculator - Butterworth Highpass Filter Designer

SWR calculator - Online VSWR Voltage Standing Wave Ratio Calculator