Larsen Antenna Cutting Chart

Enter one only one value the desired frequency or the antenna length in any length field.

Larsen antenna cutting chart. Thanks joe my chart shows to start with a 40 inch rod and using an swr. Inches cm vhf 136 mhz 21 53 3 140 mhz 20. No coil in it. Here is a handy chart for determing 1 4 wave verticals 1 2 wave dipoles and full wave loop lengths.

They come with a 49 antenna which would allow it to work at 142mhz without cutting. The larsen 150 series are designed for 144 174mhz. Inches w o spring cm 490 mhz 7 1 2 19 1 495 mhz 7 505 mhz 6 1 2 16 5 512 mhz 6 1. If they are not already cut you should be ok but you can purchase new whips if needed.

Larsen antenna cutting chart by squea tue 11 feb 1997 04 00 00 i need the cutting length for a larsen nmo 40 for operation on 47 42 mhz. W9gb jul 29 2015 3 n2tkd ham member qrz page i get no signal with it. Many of the antennas i have used have a set screw on the coil to adjust the whip. The larsen nmo150c nmo150b antenna with 48 inch whip 146 mhz no cutting required.

A small mistake can turn an antenna into just another piece of wire. Just found my old la 150 rod cutting chart. Inches cm 144 mhz 41. But in the cutting chart it has two columns one with and one without the spring.

All antenna lengths in the information below are in feet and are the results based on the standard formula of 468 fmhz total length in feet. Click on calculate and. Cutting chart if your reception is satisfactory i would leave the antenna alone. But the mag mount i did.