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Glurp
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Topic # 245213 23-Jan-2019 21:40
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Is there a site or sites where I can find lists of all radio transmitter locations in my area, regardless of transmitter type or license?

 

 





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'That VDSL Cat'
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  Reply # 2166533 23-Jan-2019 21:42
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#include <std_disclaimer>

 

Any comments made are personal opinion and do not reflect directly on the position my current or past employers may have.


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  Reply # 2166599 23-Jan-2019 23:19
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https://gis.geek.nz/celltowers


 
 
 
 


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  Reply # 2166602 23-Jan-2019 23:57
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Oblivian:

 

https://gis.geek.nz/celltowers

 

that's only cell towers.. i'd suspect OP is after something out of band for towers.

 

 

 

Next will be the questions of what harmonics affect cell towers ;)





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  Reply # 2166604 24-Jan-2019 01:45
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https://www.rsm.govt.nz/smart-web/smart/page/-smart/domain/licence/SelectLicencePage.wdk?fromHome=Yes

Just done a test search, and the RSM website allows you to do a search based solely on location. Although it will only show licenses that match the location name that you search for.

Guessing that this Question is in relation to the slow speeds that the OP has previously complained about on their RBI internet connection. Although presumably if the problem is due to someone illegally transmitting on the same frequencies, or causing interference to Vodafone. Then Vodafone would have quickly complained to RSM and gotten that person shutdown.

As for things like harmonics, They will only get worse over time. Especially due to the many Chinese switchmode power supplies, variable speed motor drives, inverter welders etc. Which all involve switching high voltages at high currents and at high frequencies.

There was even an interference issue that was traced to rusty bolts holding together a steel transmitter tower. As rust is a metal oxide. Metal oxide in contact with non rusted metal can act as a diode. And diodes, when exposed to 2 or more separate radio frequencies at the same time, can combine the frequencies and produce new unwanted frequencies.

I even have a car amplifier that kills radio reception in my car. As that amp is a class D amp (in effect just a very big switchmode power supply that is wired directly to my speakers). Solved the symptoms by using streaming music instead of going back to using a class AB amplifier.





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  Reply # 2166623 24-Jan-2019 07:29
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hio77:

Oblivian:


https://gis.geek.nz/celltowers


that's only cell towers.. i'd suspect OP is after something out of band for towers.


 


Next will be the questions of what harmonics affect cell towers ;)



Still fits into "Regardless of type and licence."

Given I suspect this is yet another thread trying to stretch to find what could be effecting his routers continual fluctuating cell signal/speed in the middle of nowhere...


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  Reply # 2166682 24-Jan-2019 08:53
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hio77:

 

https://wirelessmap.markhansen.co.nz/

 

 

 

 

This one only does fixed (point to point) links




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  Reply # 2166714 24-Jan-2019 09:55
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OK, since this has started a discussion I will explain. Someone with no technical understanding at all and an inclination to vagueness insists that people further up our street are getting a wireless Internet connection via a relay tower on a nearby hill. This cannot be a mast by any major ISP. It has to be a relay, either set up by a small local ISP I wasn't aware of or a community group I also somehow wasn't aware of. I am just trying to find out who is behind this. Since any transmitter would have to have a license, and transmitters are thin on the ground out here, I thought I might be able  to identify it from the location. I just want to know what it is. I have no idea what the location would be called. It is just a nearby hilltop. I only have approximate coordinates. So I am trying to work it out from the likely location. 

 

 

 

 

 

 





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  Reply # 2166715 24-Jan-2019 09:57
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Unless you have sighted it visually I'd go with the default conclusion that it is the tin foil hat squad at it again.






 


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  Reply # 2166716 24-Jan-2019 09:57
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The local radio enthusiast is always muttering about the amount of interference from led and cfl bulbs. He's on a hill looking over a crowded suburb. On a much smaller scale is that likely to affect mobile?

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  Reply # 2166731 24-Jan-2019 10:10
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Remember it could be unlicensed backhaul product. this would not show on any RSM database.

There is a lot of WISP's out there working in the unlicensed bands.


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  Reply # 2166733 24-Jan-2019 10:12
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hio77:

 

Oblivian:

 

https://gis.geek.nz/celltowers

 

that's only cell towers.. i'd suspect OP is after something out of band for towers.

 

Next will be the questions of what harmonics affect cell towers ;)

 

 

I know of cell towers not having enough filtering and causing 3rd order intermod with UHF and VHF systems :P 


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  Reply # 2166735 24-Jan-2019 10:13
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Right, now we get somewhere.

 

If there is a basic blackhat reselling someones 'net open plan wireless provider, chances are it won't be on a licence or be registered. 2.4/5G on a ghetto setup.

 

Unless it had a direct Microwave link like Hio77 posted which you could work out the hill it was receiving/sending from

 

There was one in christchurch for ages - Yobbo, before fibre and DSL was a thing. They had a house on the port hills with a commercial sat/feed connection and feed it out across canterbury to anyone with a high power PCMCIA card and a parabolic antenna.

 

From a hill, you can get away with a couple of high gain slotted array at equal spread. And anyone could use a parabolic or yagi on their roof. I got 15Km 2Mbit (2.4 b days) So look around the homes for a yagi or parabolic antenna pointing the same direction.

 

If it is a small/commercial net provider over a similar service. Expect the costs to be high. Getting data to the transmit point isn't cheap.

 

Some rural providers are on here and may know the area. Scorch is one of these in Canterbury https://www.scorch.co.nz/services/terrestrial-wireless/canterbury-region/ You can see one example of a repeater site in their image. Solar + microwave uplink + directional antennas

 

 

 

 


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  Reply # 2166784 24-Jan-2019 11:02
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hio77:

 

https://wirelessmap.markhansen.co.nz/

 

 

 

 

I've never seen that before - that's super cool. Is that basically anything on licenced frequencies?


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  Reply # 2166788 24-Jan-2019 11:06
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knoydart:

hio77:


https://wirelessmap.markhansen.co.nz/


 



This one only does fixed (point to point) links


Which covers most of these. It also has multi to point links...




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  Reply # 2166791 24-Jan-2019 11:07
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ResponseMediaNZ:

Remember it could be unlicensed backhaul product. this would not show on any RSM database.

There is a lot of WISP's out there working in the unlicensed bands.



Extremely likely this is the case. Not many at all out there that use licensed bands except for possibly a mw link to a very heavy isolated site




#include <std_disclaimer>

 

Any comments made are personal opinion and do not reflect directly on the position my current or past employers may have.


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