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

 

[johan]

Use this calculator:

Distance and Azimuths Between Two Sets of Coordinates​

Distance and Azimuths Between Two Sets of Coordinates

View attachment 178235

Whatever I try ; FCC Website Error
(Grrrrrrr)

 

[johan]

Whatever I try ; FCC Website Error
(Grrrrrrr)

Itt works , finaly.
great thank you

Mvg

 

[rabbit73]

Itt works , finaly.
great thank you

Mvg

Good!

Here is another one to try:

Azimuth/Distance calculator by Don Cross

 

[johan]

Itt works , finaly.
great thank you

Mvg

Rabbit; that arrow you drew at 293.00 degrees True, is that where I should turn the antenna .?!

 

[rabbit73]

Rabbit; that arrow you drew at 293.00 degrees True, is that where I should turn the antenna .?!

Yes, but propagation might change it a little.

 

[johan]

Yes, but propagation might change it a little.

Is good, I know a bit about the direction of turning.

 

[johan]

The RTL-SDR V3 dongle SDR is available here (the V4 doesn't work with the Scanner):
Buy RTL-SDR Dongles (RTL2832U)

The RTLSDR Scanner software is available here:
Releases · EarToEarOak/RTLSDR-Scanner

I use version 1.3.0

View attachment 178112

There is a short tutorial by Pete Higgins:
OTA Signal Analyzers, Meters, Aimers, Bench Gear...

It took me 3 training sessions to learn how to use the Scanner software. If you also find it difficult to learn the Scanner software, you can use SDR# (SDRSharp) software instead with the V3 SDR. It will only show a little more than 2 MHz of the 6 MHz TV channel, but that is enough to show the low end of the channel to see the Pilot Carrier and estimate the SNR.

Hello Rabbit 73, I have an RSP 1B as a recipient here. I assume that it also works. Or does it necessarily have to be an RTL - SDR V3 dongle. And you can show in a video how you work. Pretty interesting I think.

 

[rabbit73]

Hello Rabbit 73, I have an RSP 1B as a recipient here. I assume that it also works. Or does it necessarily have to be an RTL - SDR V3 dongle. And you can show in a video how you work. Pretty interesting I think.

Hello johan

I also have an RSP1B that I just bought and an RSP1A. The RSP1B has better shielding.

Your RSP1B can be used as a spectrum analyzer to show if an ATSC 1.0 signal is there even if a tuner is not able to lock on to the signal to show a picture.

So, your RSP1B can be used instead of the RTL-SDR V3 to search for an ATSC 1.0 signal.

I will try to show how I use the RTL-SDR V3 and the RSP1B as a spectrum analyzer in screenshots and amateur quality videos.

 

[telstar_1]

Because the earth is not only a spheroid shape but it is turning eastward at about 1,000 mph. You have to aim at the spot where your target will be when you get there. A 9 hour trans Atlantic flight lands at a point 9,000 miles east of where it was when you left. There is also the factor that the atmosphere is spinning sort of with the ground below.

For radio wave communications the rotation is supremely insignificant, just aim at the point of desired reception on the great circle map.

But wouldn't that apply just to an earth orbit free of gravitational influence of the land mass? An air path should be no different from a land path as far as straight line heading

 

[johan]

Hello johan

I also have an RSP1B that I just bought and an RSP1A. The RSP1B has better shielding.

Your RSP1B can be used as a spectrum analyzer to show if an ATSC 1.0 signal is there even if a tuner is not able to lock on to the signal to show a picture.

So, your RSP1B can be used instead of the RTL-SDR V3 to search for an ATSC 1.0 signal.

I will try to show how I use the RTL-SDR V3 and the RSP1B as a spectrum analyzer in screenshots and amateur quality videos.

Thank Rabbit 73


most videos with an Sdr go too fast and especially the mouse and the controls. Hope it works out Rabbit73