Something about communication range

Sometimes the simplest explanations work best.

Ham Radio Blog PD0AC

Ever wondered about the claims some manufacturers put on the box? 10, 20, 30, 40 kilometers between two handhelds? Did you ever achieve it?

Probably not, and I’ll try to explain why by using a simple example.

Before we go any further we’ll going to assume a few things.

  1. Both persons holding the radios are 1.90 meters (about 6″2) tall
  2. Both radios are identical in every respect
  3. We use the 2 meter amateur band (VHF) and 5 Watts output
  4. There are no obstacles between the two radios
  5. Nothing above ground affects the signal in a negative nor positive way
  6. There are no special band conditions

Under these circumstances, what is the maximum range?
a) up to 6 Km
b) up to 10 Km
c) up to 20 Km

The answer is: up to 6 Km, give or take a few meters (the exact number is 5.7 Km). The reason why…

View original post 318 more words

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s