Author Topic: New feed: BLM/WRI/NEL/N12/3N6  (Read 215760 times)

Offline RonR

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Re:
« Reply #75 on: November 25, 2013, 06:12:49 AM »
75 now...Yes, so far I love my galaxy 4. My daughter has the iPhone 5 and I honestly don't see what the fuss is all about. The iPhone is nothing special to me.

Sent from my Galaxy S4 using tapatalk

Offline ferraraj

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Re: New feed: BLM/WRI/NEL/N12/3N6
« Reply #76 on: November 25, 2013, 07:49:46 PM »
Hey John...133.5 on the BLM feed is not picking up any ground side...can you try it on the other (WRI) radio to see if its any better?

Offline JohnN

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Re: New feed: BLM/WRI/NEL/N12/3N6
« Reply #77 on: November 25, 2013, 08:15:42 PM »
Really? It was working fine before. I'll give it on shot back over on the WRI scanner again. I've been too busy playing with my Galaxy S4 to pay attention to my feeds. This phone can do so much, but I probably won't use even ½ of its features.

All right, I've got 33.5 on the Pro-2006, and I think I heard the ground. I don't have any problem leaving it in the scan during the storm, if no one has any objections. After Thursday, I'd go back to the original frequencies. Does anyone have any objections to this temporary setup?
« Last Edit: November 25, 2013, 08:27:14 PM by JohnN »

Offline ferraraj

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Re: New feed: BLM/WRI/NEL/N12/3N6
« Reply #78 on: November 25, 2013, 09:03:36 PM »
It was picking up ground side overnight..but by this afternoon there was nothing... Just an FYI. Thanks for accommodating my request...

Offline dave

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Re: New feed: BLM/WRI/NEL/N12/3N6
« Reply #79 on: November 25, 2013, 09:05:38 PM »
It was picking up ground side overnight..but by this afternoon there was nothing... Just an FYI. Thanks for accommodating my request...

Or was it picking up a different ground transmitter because they were on the mid and combined up?

Offline JohnN

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Re: New feed: BLM/WRI/NEL/N12/3N6
« Reply #80 on: November 26, 2013, 12:09:56 PM »
Has anyone else noticed that automated weather advisory that comes in on the BLM feed once in a while? I might have to do some research on that, and see if I can figure out where it is coming from. I'll have to see if I can do something about it.

Offline InterpreDemon

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Re: New feed: BLM/WRI/NEL/N12/3N6
« Reply #81 on: November 26, 2013, 01:14:04 PM »
Does it only happen at night, or on a regular schedule of some sort?

Offline JohnN

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Re: New feed: BLM/WRI/NEL/N12/3N6
« Reply #82 on: November 26, 2013, 01:23:55 PM »
It's not only at night, because I've been hearing it happen today. I haven't been paying attention to how often it happens. I do think this is going to be difficult to solve, because I haven't been able to track down what frequency it happens on. When I hear it on the feed, I look at the scanner to see what it stopped on. Problem is, the scanner says it's scanning. I don't know if that has something to do with a delay in the feed or something. I'll keep trying to track this down. I'll let you know what I find.

Offline InterpreDemon

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Re: New feed: BLM/WRI/NEL/N12/3N6
« Reply #83 on: November 26, 2013, 02:08:07 PM »
Look at both scanners, make sure they do not both lock up when it is happening, because it could be an image. Too complicated to explain.

Offline RonR

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Re: New feed: BLM/WRI/NEL/N12/3N6
« Reply #84 on: November 26, 2013, 06:03:45 PM »
John, if you're listening to your feed through the liveatc site (that's what I do with my feeds all the time), then there is a short delay between reception of the signal on your scanner and hearting it online.  By the time you briefly hear that automated weather service online, the scanner already started scanning again.  At least that's why I belive you're not seeing it on your scanner.

And yes, I have heard it too, but I hadn't heard it since you put in the stub filter so I thought the filter took care of that.  I guess it didn't  :-)

Offline JohnN

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Re: New feed: BLM/WRI/NEL/N12/3N6
« Reply #85 on: November 26, 2013, 06:33:05 PM »
From what I can remember, the AWOS broadcast usually lasts about 5-10 seconds. So between the delay, and my slow reaction time, this is going to be difficult to track down. I guess I could start by listening and seeing if this happens on a regular interval. Or I can sit and stare at the scanner constantly until this happens again. I don't think it's the NWS station, so it might be one of the airport's AWOS. I'll have to get my portable scanner and see if I can match up the voice and current conditions. My guess is it is coming either from BLM or N12.

Offline dave

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Re: New feed: BLM/WRI/NEL/N12/3N6
« Reply #86 on: November 26, 2013, 06:34:18 PM »
I have heard it a couple of times but couldn't identify the airport - it isn't there for long.  I wouldn't waste too much time chasing it.  It was really infrequent.  Has that changed?

Offline JohnN

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Re: New feed: BLM/WRI/NEL/N12/3N6
« Reply #87 on: November 26, 2013, 06:39:41 PM »
I wouldn't say that it is a problem. Just one of those things that would be nice to track down if I can. The AWOS for BLM is 121.625, and N12 doesn't have an AWOS. Is it possible for 121.625 to "bleed" onto one of the frequencies I'm scanning?

Offline dave

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Re: New feed: BLM/WRI/NEL/N12/3N6
« Reply #88 on: November 26, 2013, 06:42:05 PM »
I wouldn't say that it is a problem. Just one of those things that would be nice to track down if I can. The AWOS for BLM is 121.625, and N12 doesn't have an AWOS. Is it possible for 121.625 to "bleed" onto one of the frequencies I'm scanning?

It's very possible, yes.  Could be some intermodulation causing it.  *That* might be hard to get rid of - but first the offending transmitters need to be identified - the ones causing the product to appear in the first place.  Nothing a little time, math, patience, and a spectrum analyzer can't solve.

Offline JohnN

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Re: New feed: BLM/WRI/NEL/N12/3N6
« Reply #89 on: November 26, 2013, 06:45:38 PM »
Well, I have time, and some math abilities. The patience and spectrum analyzer could be a problem. So I think I'm just going to assume it's 121.625 and leave everything alone.

Offline dave

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Re: New feed: BLM/WRI/NEL/N12/3N6
« Reply #90 on: November 26, 2013, 06:58:22 PM »
Well, I have time, and some math abilities. The patience and spectrum analyzer could be a problem. So I think I'm just going to assume it's 121.625 and leave everything alone.

The first step is to identify exactly what AWOS it is.  Then…read up on intermodulation products:

http://en.wikipedia.org/wiki/Intermodulation


Offline JohnN

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Re: New feed: BLM/WRI/NEL/N12/3N6
« Reply #91 on: November 30, 2013, 02:15:27 PM »
Just caught the frequency the AWOS comes through on. It was 122.8, which is Lakewood's CTAF. According to AirNav, the nearest AWOS are BLM (121.625) and MJX (119.875), which is 17 nm from BLM.

Offline ferraraj

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Re: New feed: BLM/WRI/NEL/N12/3N6
« Reply #92 on: December 02, 2013, 08:31:57 PM »
I'm having a hard time figuring out...is 133.5 off the WRI scan now? 118.97 sure comes in nice :-)! This is the only feed that can hear 133.5, did you and Dave decide if it could be added permanently?...

Offline JohnN

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Re: New feed: BLM/WRI/NEL/N12/3N6
« Reply #93 on: December 02, 2013, 10:16:04 PM »
I've been trying to post from my phone, but I guess it's not working. I've been meaning to lock out 33.5, but I haven't gotten around to it. So yes, as of now, 33.5 is on the feed. I'm probably going to lock it out soon to free up the feed, until I get a 3rd scanner.

Offline JohnN

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Re: New feed: BLM/WRI/NEL/N12/3N6
« Reply #94 on: December 04, 2013, 07:35:04 PM »
Just found another Pro-2006 on ebay. No bids, currently at $9.99 and $20 shipping. I put a $10 bid, but I doubt I'll get it. If I were to get the 3rd scanner, my setup would be:

Pro-2006 #1           Pro-2006 #2  Bearcat 350A
KWRI                       118.975         KBLM
KNEL                        125.325         N12
McGuire Approach    133.500        3N6
McGuire Departure

Two of them would be hooked up to the Pi, on to my laptop. Hopefully no one else bids on the scanner, because I'm not really willing to go over $30 total right now.

Offline JohnN

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Re: New feed: BLM/WRI/NEL/N12/3N6
« Reply #95 on: December 04, 2013, 10:15:46 PM »
Well, I've been outbid. I knew it would happen. Does anyone have any recommendations of other scanners to look out for, besides the Pro 2006?

Offline InterpreDemon

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Re: New feed: BLM/WRI/NEL/N12/3N6
« Reply #96 on: December 05, 2013, 02:31:47 PM »
Sure, the RS Pro 2050, the BC 780, 785 or plain 350

The bigger issue is that you will be knocking the signal down by roughly a half to the existing radios (or one of them) when you add this third radio. Best thing to do is determine which of the existing radios has better coverage (probably the CTAF) and split that line in two. The marginal ground stations you are picking up now will probably be gone after another 3dB drop in signal, so you need to organize your radios so that the weakest signals are on the radio at the top of the splitter chain. If the third radio is going to have 133.5, it might need to be on the first splitter in order to pick up the ground side and the most distant aircraft, with the second output on that splitter going to another splitter that feeds the other two radios. Some radios have better ears than others as well (even between two identical models), so you can put them further down the splitter chain. It takes time and experimentation to arrive at the configuration that gets most or all of what you want to hear, most or all of the time, and sometimes that can result in a rather elaborate setup.

Offline JohnN

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Re: New feed: BLM/WRI/NEL/N12/3N6
« Reply #97 on: December 05, 2013, 03:22:46 PM »
I forgot to factor in the loss of signal. I bet I would lose the ground communications if I split it again. I think I have room for a second antenna on the roof, just not room in the budget. I guess maybe I could ask Santa for another antenna and scanner.

Offline InterpreDemon

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Re: New feed: BLM/WRI/NEL/N12/3N6
« Reply #98 on: December 05, 2013, 07:57:20 PM »
If the radio and antenna are for 133.5 I think there is plenty enough Santa out here to deliver. Just make your list and set it out with the milk and cookies.

Offline JohnN

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Re: New feed: BLM/WRI/NEL/N12/3N6
« Reply #99 on: December 06, 2013, 11:12:06 AM »
I think there should be enough room on the roof for a second antenna, but I will have to check and make sure. Do you have any recommendations for a homemade antenna that would work about as good as what I have up there now?