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Off Topic Wireless - If it receives or transmits and it doesn't fit in anywhere else, WayneH will probably move it here

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  #41 (permalink)  
Old 01-10-2017, 3:04 PM
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Please post links to your local media outlets and when you plan on doing this.
Yes please. This should be interesting.
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Old 01-10-2017, 3:38 PM
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please tell us the general type of business your trying to monitor. why don't you just go there and act like your applying for a job?
It is a transport business.

A bit of background: when I started scanning in the late 1990's, they had a licensed frequency of xx.xxxMHz which was registered to them "John Smith Transport".

In around 2003/2004 this frequency went dead. A few years later I found them using a shared repeater on xxx.xxxxMHz. This was licensed to "ABC Communications" but was being used by "John Smith Transport". I spent a lot of time listening to them to confirm this.

In the past year, this frequency has also gone dead, I suspect they have moved to a UHF simplex frequency which was used by another company which they purchased a couple of years ago, I can't confirm this.

Their depot is located at the end of a public road with no other businesses anywhere close by. Due to the nature of what they transport they get very nervous about anybody hanging around. If I had an easy way to do this I would be taking that path.
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Old 01-10-2017, 3:41 PM
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Originally Posted by redbeard View Post
Unfold a chair and sit there and listen. The fact that you don't want to be seen by anyone at this 'company' implies way more intent than just casual monitoring and frequency identification.
I don't have the time to sit around all day waiting for them to maybe use the radio and as per my last post, it is not an area you could be "hanging around".
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Old 01-10-2017, 3:43 PM
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That said, I suspect there's a lot more to your story than you're willing to share with us. So, while there may be many forum members more than qualified to help you, I'd think it best for them to resist the temptation to do so.
Nothing else to it, I am trying to find what frequency a business is using when the frequency they were using in the past has gone dead.
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Old 01-10-2017, 3:57 PM
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What are you really trying to do?

Seems a bit overboard with regards to your covert ops planning just to monitor a "transport" business.
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Old 01-10-2017, 4:19 PM
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What are you really trying to do?

Seems a bit overboard with regards to your covert ops planning just to monitor a "transport" business.
I am trying to locate the frequency of a business who have stopped using their previous frequency. This is what I do. I don't really care about the contents of the communications, just who is using what frequencies. It is something I have done for many years, this business is just turning out to be a harder target.

Here are some examples of me doing this:
VKPC7PB: Article - Hunting out new and exciting frequencies - Updated September 2016

VKPC7PB: Update on Penny Royal

VKPC7PB: Close Calling LED Signs

VKPC7PB: Launceston Tip Radio Usage

VKPC7PB: New Active Frequency - 471.700MHz

VKPC7PB: 462.100MHz Officeworks Launceston
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Old 01-10-2017, 4:21 PM
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Perhaps they have moved to MDTs or cell phones.
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Old 01-10-2017, 4:23 PM
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Moved to the Tavern since this really isn't about scanning, it's about hiding a piece of electronics.
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Old 01-10-2017, 4:27 PM
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Originally Posted by bpckty1 View Post
Perhaps they have moved to MDTs or cell phones.
Both very possible, other users have done this. I just want to be sure before I stop scanning their frequency.
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Old 01-10-2017, 7:20 PM
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Your 162.500 MHz LED signs reminds me of a problem I investigated about 30 years ago. Motorola sold a $6 million system to a city and could not get final acceptance because of an interference problem that was nasty and annoying. Many had tried including my self but failed to find the source after many weeks. The signal was weak, fleeting and blocked by high rises. It also appeared to be coming from many directions as once. Finally a helicopter was furnished and I got to bring my equipment way above building height. I had a partner on the ground in a mobile similarly equipped. Finally I got a good hit and was able to point the other guy in the direction of a parking lot. He identified the vehicle involved and approached the driver. It turns out Motorola made a low cost 800 MHz mobile called the MOSTAR that had a 53.9 MHz IF. This placed its receiver LO precisely on the two channels that affected the City. This news of course meant that Motorola 1) Was the cause of the problem 2) Motorola had sold thousands of these mobiles in the county and surrounding counties and 3) Motorola had to make $ystem change$ (Specifically ones I had suggested to management weeks earlier) to make the system less susceptible to the problem. This news of course was received coldly and skeptically in Schaumburg. So I spent an afternoon parked at an intersection that I had found would be a good choke point for commercial vehicles using these radios. I set up my test equipment and photographed the names on all the dozens of commercial vehicles that raised the signal. They all had this particular Motorola Mostar.
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  #51 (permalink)  
Old 01-10-2017, 7:40 PM
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Originally Posted by pb_lonny View Post
Due to the nature of what they transport they get very nervous about anybody hanging around.
Sounds like you're asking for trouble.

Why are you obsessed with this? If you suspect illegal activity, report it to the proper authorities and let them handle it.

Otherwise, your shenanigans are likely to get a can of whoop-azz opened on you, esp if they're "nervous."

Last edited by bill4long; 01-10-2017 at 7:47 PM..
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Old 01-10-2017, 7:58 PM
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Do a search for "ammo can repeater"...
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Old 01-10-2017, 8:00 PM
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Originally Posted by bill4long View Post
Sounds like you're asking for trouble.

Why are you obsessed with this? If you suspect illegal activity, report it to the proper authorities and let them handle it.

Otherwise, your shenanigans are likely to get a can of whoop-azz opened on you, esp if they're "nervous."
safe or not i can see where op would be curious and they say curiosity killed the cat but at least he knew before he died
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Old 01-10-2017, 8:37 PM
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Do a search for "ammo can repeater"...
Another great idea. I am working on building a suitable case at the moment.
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Old 01-10-2017, 8:38 PM
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Originally Posted by RFI-EMI-GUY View Post
Your 162.500 MHz LED signs reminds me of a problem I investigated about 30 years ago.
Good to hear of other people who do this sort of thing, hunting down frequencies and spectrum usage.
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Old 01-10-2017, 8:50 PM
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Originally Posted by bill4long View Post
Sounds like you're asking for trouble.

Why are you obsessed with this? If you suspect illegal activity, report it to the proper authorities and let them handle it.

Otherwise, your shenanigans are likely to get a can of whoop-azz opened on you, esp if they're "nervous."
its fun op wants to see what he can find on his own he seems to be doing some research to keep the whoop-azz from being opened on him
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Old 01-10-2017, 9:10 PM
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Another great idea. I am working on building a suitable case at the moment.
You can buy weatherproof gasketed thermoplastic electrical boxes at hardware stores. They are available in all sizes. Usually you will see a medium sized one supported on several pieces of underground PVC electrical conduit sticking out of the soil on traffic medians and in the landscaped islands in parking lots. Usually they contain controls for irrigation systems. No one gives them a second thought.
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Old 01-10-2017, 9:19 PM
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You can buy weatherproof gasketed thermoplastic electrical boxes at hardware stores. They are available in all sizes. Usually you will see a medium sized one supported on several pieces of underground PVC electrical conduit sticking out of the soil on traffic medians and in the landscaped islands in parking lots. Usually they contain controls for irrigation systems. No one gives them a second thought.
cool idea
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Old 01-10-2017, 9:52 PM
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Originally Posted by Dog View Post
Do a search for "ammo can repeater"...
In the woods near a tree stand, this would not cause too much concern. In an urban area, in Nervous 'Merika,, well see for yourself:

https://www.youtube.com/watch?v=2hmcf1mHVoU
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Old 01-10-2017, 9:52 PM
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You can buy weatherproof gasketed thermoplastic electrical boxes at hardware stores. They are available in all sizes. Usually you will see a medium sized one supported on several pieces of underground PVC electrical conduit sticking out of the soil on traffic medians and in the landscaped islands in parking lots. Usually they contain controls for irrigation systems. No one gives them a second thought.
Great idea and exactly the sort of response I was looking for.
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