# Does a mobile antenna need to be grounded?

## Does a mobile antenna need to be grounded?

(1) GROUNDING ANTENNA: Obtaining a good ground is very important to any HF mobile installation. No matter where your antenna is mounted, it is highly recommended you run a heavy copper strap or braid (1″ to 3″) between the body and frame of your vehicle.

**What is the length of a 40 meter dipole?**

Read more about . . . . Dipole Length Calculations.

Approximate Lengths for HF Ham Band Dipole Antennas | ||
---|---|---|

Band (MHz) | Length (Feet) | Length (metres) |

7.0 MHz (40 metres) | 68.5 | 21.1 |

10.1 (30 metres) | 47.5 | 14.7 |

14.00 (20 metres) | 34.3 | 10.6 |

### What is formula for 40 meter vertical antenna?

The most widely used formula to calculate the approximate overall length of wire required for a dipoleis:468 / frequency (MHz) = length of wire in feet. The antenna calculator above uses this formula as a starting point to calculate wire lengths for the dipole. The results are conveniently displayed in inches, centimeters, feet and meters.

**What is the frequency of the 40 meter band?**

The 40-meter or 7-MHz band is an amateur radio frequency band, spanning 7.000-7.300 MHz in ITU Region 2, and 7.000-7.200 MHz in Regions 1 & 3. It is allocated to radio amateurs worldwide on a primary basis; however, only 7.000-7.100 MHz is exclusively allocated to amateur radio worldwide.

## What is the length of a 40 Meter Dipole?

Your dipole is cut for 40 meters or about 66 feet total length and you feed it with 450 ladder line to a tuner to make it a multibander. You would use either, 42-52, 73-83, 112-123 or 145-155 feet according to the chart above.

**What is 40 meter?**

You are currently converting Distance and Length units from Meters to Feet. 40 Meters (m) = 131.2336 Feet (ft) Visit 40 Feet to Meters Conversion