Tv Broadcast signal`s

[rabbit73]

This is the answer given by the designer/builder; Hello Harry,

If I only look at the lower VHF part, I see frequencies from 55 to 88Mhz.
This is about 30MHZ.
For a peaked antenna you are actually stuck with a bandwidth of 2..Mhz.. 3 maybe 4 Mhz.

It is possible to design a normal yagi with a bandwidth of about 8mhz...
But of course this is already at the expense of the gain... and gain was just what you wanted I understand.

So.... it is possible.... but 'only' for a few channels.
So for example channels 2 and 3 or channels 5 and 6.

How do you see that?!

Mvg

Harry is correct. It would be difficult for a Yagi design to cover all channels 2 to 6. But a Yagi would give the best gain for just one channel.

The way that Winegard solved the problem is to use a log periodic design (LPDA). An LPDA can use a single boom with insulators and crossover wires or a double boom.

HD8200U Platinum HD Series Antenna

Winegard Platinum Outdoor TV Antenna VHF UHF FM (HD8200U)

Specs for 8200U

This is a less expensive clone (copy):

Xtreme Signal Long Range HD VHF UHF FM Outdoor TV Antenna (HD8200XL)

View: https://www.youtube.com/watch?v=kQmpAEO7hy0&t=296s



Manual

 

[johan]

And again rabbit73
Thank you

 

[rabbit73]

There is not a signal everywhere. I have experienced this here. In the attic, with a funke antenna that is intended for the Uhf and the transmitter tower is 30 km from Aalten (Holland) where I live. Mvg

Yes, how to aim your antenna is important, especially with a high gain antenna.

Aalten - Wikipedia

I tried this calculator:
Azimuth Calculator

 

[johan]

The coordinates of : WLBZ Bangor, Me and Aalten are known. How do I calculate or draw a line to see how long the distance is. Because that's what the calculator wants to know. It may be very simple. Mvg

 

[rabbit73]

The coordinates of : WLBZ Bangor, Me and Aalten are known. How do I calculate or draw a line to see how long the distance is. Because that's what the calculator wants to know. It may be very simple. Mvg

1. You give the coordinates to the calculator.
2. The calculator gives you the azimuth AND the distance as the answer.

 

[johan]

Rabbit 73 , you can demonstrate it . I am very grateful.

 

[johan]

I try and try, but nothing.

 

[Jim5506]

This video shows you how to do the calculation. I requires a bit of geometric math. Lots of sin and cos calculations but you are really calculating the length of the arc between two points relative to the center of the earth.

great circle calculator - Search Videos

www.bing.com

 

[rabbit73]

I try and try, but nothing.

Use this calculator:

Distance and Azimuths Between Two Sets of Coordinates​

Distance and Azimuths Between Two Sets of Coordinates