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Antennas : 70cm- Cross-Yagi 10el Antenna for 70cm
- 10 Elements Cross-Yagi Antenna for 433 MHz. The base of the 10el antenna is the recalculated RA6FOO antenna.Circular polarization is realized - by a phasing quarter-wave line, matching of horizontal and vertical polarization antennas
[ Hits: 173 | Votes: 6 | Rating: 8.83 ]
- Online Yagi Antenna Calculator
- HF Beam Calculator for Amateur Radio and CB Communications
[ Hits: 545 | Votes: 16 | Rating: 5.5 ]
- The Magloop Antenna Calculator
- The Magloop Antenna Calculator was developed to predict the characteritics of a small-loop (aka magloop) antenna, given physical dimensions entered via slider widgets. This magnetic loop antenna calculator works also on most mobile devices, adjusting sliders and calculating dimensions in real time.
[ Hits: 297 | Votes: 5 | Rating: 8.2 ]
- Loaded Quarter Wave Antenna Inductance Calculator
- Here is a formula and calculator for creating a loaded (shortened) quarter wave vertical or balanced dipole. The calculation refers to either a loaded 1/4 wave or a loaded dipole
[ Hits: 162 | Votes: 0 | Rating: 0 ]
- Slim Jim Antenna Calculator by M0NWK
- Easy to use online Slim Jim antenna calculator. Input your frequency to automatically calculate the lengths of the different antenna parts.
[ Hits: 188 | Votes: 4 | Rating: 8.5 ]
- Coil-Shortened Vertical Antenna 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.
[ Hits: 309 | Votes: 2 | Rating: 5.5 ]
- 3 Element Yagi Calculator
- This calculator is designed to give the critical information of a particular beam antenna, in this case a three element Yagi, for the frequency chosen.
[ Hits: 435 | Votes: 5 | Rating: 5.6 ]
- How to Tune Dipole Antennas
- This is a standard calculation method that can help you while tuning dipole antennas, by adjusting wire lengths. This method can be used also when you need to add lenght to your wires, and can be additionally used to quarter waves vertical antennas
[ Hits: 335 | Votes: 5 | Rating: 8.6 ]
- Short Multiband Dipole Array
- A multiband shortened fan dipole. This page offers and online calculator that can be really useful if you plan to homebrew a multiband dipole for low HF bands and you don't have all needed space for the full lenght. It combines multiband dipole with loading coild for selected bands.
[ Hits: 229 | Votes: 0 | Rating: 0 ]
- Cantenna Calculator
- Aka Circular Waveguide Antenna. This online antenna calculator let you plan your cantenna for the desired frequency of operation, giving the Can diameter you have available.
[ Hits: 360 | Votes: 5 | Rating: 4 ]
- Maidenhead square Calculator
- You can use this tool to calculate the maidenhead square by entering the longitude and latitude.
[ Hits: 146 | Votes: 1 | Rating: 8 ]
- Calculation of the Maximum Usable Frequency
- This paper presents the method of calculating the maximum usable frequency (MUF) and field strength of radio waves reflecting 2 times at the F2 ionosphere layer under inhomogeneous conditions of the ionosphere. The comparison between predicted and measured MUF has shown that the proposed method significantly increases the accuracy of calculation MUF.
[ Hits: 239 | Votes: 2 | Rating: 5.5 ]
- HF communication prediction tools
- Online HF Communication prediction system provided by the Australian Governament Buerau of Metereology allow to predict usable frequency rage for radiocommunications between two stations allowing to specify frequency and date range. This tool allow calculation with different methods and algorithms
[ Hits: 168 | Votes: 0 | Rating: 0 ]
- AirScout
- Software for Aircraft Scatter Prediction. Extend your capabilities on VHF-/UHF-SHF bands even when you live in an unprivileged location and Calculate a propagation path between two stations and follow the aircrafts in real time
[ Hits: 295 | Votes: 2 | Rating: 5.5 ]
- How to calculate Bearing and great-circle distance between two points
- Calculate distance, bearing and more between Latitude/Longitude points. This page presents a variety of calculations for latiĀtude/longiĀtude points, with the formulas and code fragments for implementing them.
[ Hits: 195 | Votes: 3 | Rating: 3.33 ]
- VSWR Calculator
- This calculator converts between VSWR and Return Loss, Reflection Coefficient, Mismatch Loss, and Reflected Power.
[ Hits: 99 | Votes: 2 | Rating: 7 ]
- Online dBm to watts conversion
- dBm to watts conversion calculator and explaination on how to convert dBm to watts, including dBm to watts conversion table
[ Hits: 129 | Votes: 4 | Rating: 4.5 ]
- mW to dBm Calculator
- Online calculator that will convert power entered in milliwatts to dBm. Includes a quick mW to dBm conversion table
[ Hits: 80 | Votes: 0 | Rating: 0 ]
- RF Impedance Matching Calculator
- Calculates the network to match a line to a specific complex load. This online tool calculates the matching network necessary to terminate a line of the specified characteristic impedence Zo in a specific complex load impedence RL + jXL at a specified frequency.
[ Hits: 192 | Votes: 1 | Rating: 10 ]
- Online Toroid Multi Calculator
- This website provide online calculator for several values about a large variety of toroids. Freq/L/C/Z/Turns Calculator, Impedance Matching Network Calculator
[ Hits: 210 | Votes: 3 | Rating: 5 ]
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