Coaxial Cable Dimensions Calculator

To determine the proper length of coax.

Coaxial cable dimensions calculator.

The calculator will only return data for frequencies below the cutoff frequency or fco of the cable. The measurements below are for building a simple dipole antenna. The 75 ohm coax is 216 ft long vf 82 guesstimated and is a perfect 1 4 multible for 17 and 20 meters. Always check with a coaxial cable vendor for values specific to the type you plan to use.

Distance enter the one way length of the wires in the circuit in feet. Place a 1 1 balun on the antenna end of the feedline. This is typically in a raceway cable tray or conduit in a cable burried in the earth or in open air. Bookmark or favorite this coaxial cable impedance calculator page by pressing ctrl d.

Enter db loss of cable per 100 ft. Note that attenuation values are given at 400 mhz but can and do often have significantly different values at other frequencies. The calculator says i would gain 1db or less by changing coax. Pasternack s coaxial cable impedance calculator allows you to enter the outer diameter dielectric width inner conductor diameter width and either the dielectric constant or velocity of propagation vop values in order to calculate the impedance of the coax.

The length of the coaxial cable is the center of many debates that 18 wheeler drivers have over the c. Online coax cable loss antenna gain calculator. It is recommended not to exceed a voltage drop of 5. I am feeding it with rg 6 tv foam coax.

This is derived for the 2m vhf of amateur allocation 144 mhz 148 mhz. Enter length of cable in feet. The larger the wire the wider the bandwidth. How long should my coax cable be.

The wire size can range from 16 awg to 12 awg. Using the league table you can see that the db loss for 100m of lmr 600 coax at 50 150mhz is 1 8db. Here you can see that the total length of cable being used is 19 5m which is 7 half wavelengths taken from the multiple 1 2 wavelengthstable with a single 1 4 wavelength added as shown in the coaxial length calculator. Voltage drop choose the maximum percentage of the source voltage drop.

It is thought to be accurate but it is the responsibility of the user to verify the accuracy of. A calculator to determine the proper length coax to use in your vehicle. This program is provided as is. For vhf 2m the center frequency is about 146mhz.

This antenna is 140 ohms or so both on 14mhz and 18 mhz. At the desired operating frequency. Cable loss antenna gain calculator. Clinics of america dot com inc.

Enter gain of antenna in dbd. Compliments of the c. I was thinking of using rg 11 foam. Actual measured values may vary from the calculated values based on manufacturing tolerances cable assembly length connector performance actual operating frequency and measurement accuracy.

Properties of popular coaxial cables. The feed z xmitter end is 40 45 ohms j 0.