Splitter question

[dave3825]

I would like to know if this would work. Lets say I have 2 yagi antennas. One facing north and the other facing south. If I ran them into a splitter (output side) and took the actual input connector and ran it to my scanner, would I receive signals from both north and south???

This is a pic of what I have.

 

[N_Jay]

I would like to know if this would work. Lets say I have 2 yagi antennas. One facing north and the other facing south. If I ran them into a splitter (output side) and took the actual input connector and ran it to my scanner, would I receive signals from both north and south???

This is a pic of what I have.

Yes.

You would get about a 3 to 4 dB reduction in peak gain.

You would also get several small peaks and deep nulls in other directions.

 

[n8emr]

I would like to know if this would work. Lets say I have 2 yagi antennas. One facing north and the other facing south. If I ran them into a splitter (output side) and took the actual input connector and ran it to my scanner, would I receive signals from both north and south???

This is a pic of what I have.

Unless your specificly trying to limit signals east and west, why not just go to a omni antenna.?

 

[dave3825]

why not just go to a omni antenna.?

Well I have a scantenna and 2 yagi. my one yagi picks up a system deep in nassau and the other pics up nyc better than the scantenna. I am trying to have the best of both worlds..


I also have a splitter that does not have any circuitry, it just connects all three center leads and of course its metal so the outer leads/shield are all connected..

 

[N_Jay]

Well I have a scantenna and 2 yagi. my one yagi picks up a system deep in nassau and the other pics up nyc better than the scantenna. I am trying to have the best of both worlds..


I also have a splitter that does not have any circuitry, it just connects all three center leads and of course its metal so the outer leads/shield are all connected..

That is not a splitter, it is a "T"and with that you will have other issues.

 

[dave3825]

That is not a splitter, it is a "T"and with that you will have other issues.

Lol it says splitter on it Its seems like nothing more than a 3 way connector...
I do have other multi/amplified switches but am unsure about them.


I just want to use a omni and yagi at the same time without signal lose. The scantenna is amplified.

 

[W6KRU]

Lol it says splitter on it Its seems like nothing more than a 3 way connector...
I do have other multi/amplified switches but am unsure about them.


I just want to use a omni and yagi at the same time without signal lose. The scantenna is amplified.

But using a yagi with an omni negates a major benefit of the yagi and can cause new problems. Mult-antennas are usually a bad idea. There is a sticky that addresses this exact question.

 

[N_Jay]

Lol it says splitter on it Its seems like nothing more than a 3 way connector...

Where did it come from? IS it designed for a particular use?

I do have other multi/amplified switches but am unsure about them.

????

I just want to use a omni and yagi at the same time without signal lose.

You are asking for magic.

The scantenna is amplified.

Hu??

Explain please.

 

[thewenk]

I just want to use a omni and yagi at the same time without signal lose. The scantenna is amplified.

To do that you want to use a diplexer, which will keep the omni received signals from being mixed with the yagi signals. Do a search on "diplexer" and "Tin Lee". Much has been discussed about this previously.

Dave

 

[W6KRU]

To do that you want to use a diplexer, which will keep the omni received signals from being mixed with the yagi signals. Do a search on "diplexer" and "Tin Lee". Much has been discussed about this previously.

Dave

I'm not sure I understand your statement but I don't think a diplexer works that way. The two signals will be mixed downstream from the diplexer. The other issue is the function of a diplexer. A diplexer separates two frequency bands. A diplexer for hooking up 2 antennas on the same frequencies just doesn't sound right.

 

[thewenk]

I'm not sure I understand your statement but I don't think a diplexer works that way. The two signals will be mixed downstream from the diplexer. The other issue is the function of a diplexer. A diplexer separates two frequency bands. A diplexer for hooking up 2 antennas on the same frequencies just doesn't sound right.

I definitely do not understand what you are trying to do.

Dave

 

[W6KRU]

I definitely do not understand what you are trying to do.

Dave

You suggested a diplexer for hooking an omni to a yagi and I was trying to explain to you what a diplexer was and what it wasn't. A diplexer would be used to hook up a dual band uhf/vhf radio with a single output to two different antennas. It would not be used to hook up two uhf antennas to the same receiver.

 

[rico47635]

Wouldn't it be simpler to use a pre-amp with a discone type of antenna?

 

[W6KRU]

Wouldn't it be simpler to use a pre-amp with a discone type of antenna?

It would depend on the situation. A pre-amp will amplify noise as well as signal. A directional antenna will cut down on the signal/noise coming from the back and the sides of the antenna. Anything you are not interested in ( the back and sides of the antenna ) is attenuated by the antenna. You won't have as much noise on the front end of your scanner and it will be easier for it to hear a low level signal. HTH

 

[zz0468]

There's a sticky with a discussion of using two or more antennas with a splitter and one receiver. The bottom line, like I mentioned in that other thread, is just hooking them up is going to create a pattern that looks more like a bug splat on a windshield. And none of the antennas will exhibit the kind of gain and directivity they're capable of on their own.

 

[dave3825]

N Jay

In response to your multi quote lol

The splitter is old and its a Pfantone TV-HSPL2GL Pic here and here

I have a bunch of amplified splitters/multiswitches 1 pic here.

omni and yagi at the same, asking for magic.
I have been known to do that from time to time lol.

amplified scantenna
I have an inline amp for satalite tv right at the scantenna. On the systems I listen to, it increased reception alot. One trunked system went from 1 bar to 4 another went from 3 to 5 bars.

On the conventional side, I get NYPD pretty well now. I get FDNY almost 5 bars. I can receive New Jersey and Connecticut UHF very clear.

I get the trunked Federal system 4 bars.

I used to get the Metro 21 system 3 bars but now its not working. I need to see if they rebanded since my last upload.

I get barely one bar on the DOITT UHF system. I can not get anything on the DOITT system, NY NJ Port Authority or the NYC MTA systems.


Now with the yagi pointing west I would get these better.

 

[rico47635]

It would depend on the situation. A pre-amp will amplify noise as well as signal. A directional antenna will cut down on the signal/noise coming from the back and the sides of the antenna. Anything you are not interested in ( the back and sides of the antenna ) is attenuated by the antenna. You won't have as much noise on the front end of your scanner and it will be easier for it to hear a low level signal. HTH

Don't they now have DSP technology that includes a pre-amp? I will have to check my MFJ catalog, but I am pretty sure there are some that do both.

 

[N_Jay]

Don't they now have DSP technology that includes a pre-amp? I will have to check my MFJ catalog, but I am pretty sure there are some that do both.

Hu???
DSP at 800 MHz?