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Author Topic: feed tips for KLAX  (Read 13010 times)
bluecrewfan08
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« on: May 17, 2008, 11:35:37 PM »

Looking for input on what people are looking for in a KLAX feed?  which freq?  I have noticed that even living very close to the tower( less then 2 miles), each freq has unique differences and limitations.

So far, ground seems to be tough, tough to make out the tower, but clear as day from the aircraft. I don't get that.
 I am 1 mile north/east of 24 R, yet  everything is much clear on approaches to the 25's.  Curious.

If there are any LAX locals, I am in the Osage area. Any suggestions?


Rob
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MathFox
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« Reply #1 on: May 18, 2008, 08:05:21 AM »

Firstly, we will be happy with any LAX feed, you can pick frequencies for any reason you like.

An airport like LAX can generate several good streams; ideally there would be a handful of scanners, each doing their set of frequencies, see the Boston and New York sets of feeds. With less scanners you can pack the scanners, trying to get all (will result in the listener hearing a lot of snippets of conversations on different frequencies) or pick a small set of frequencies per scanner where it is easier to follow a plane in. "Tower", "Ground" and "Approach/Departure" are common selections, each with their share of fans. Two or three active frequencies per stream maximum.

I don't know how the airspace at LAX is organised, but it could be interesting to have a "Tower+Approach+Departure" feed for the North runways and a separate similar feed for the South complex.
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KSYR-pjr
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« Reply #2 on: May 18, 2008, 10:26:47 AM »

Bluecrew, do you have your antenna mounted outside of your house or are you using an indoor antenna?
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Regards, Peter
ATC Feed:  Syracuse (KSYR), NY
bluecrewfan08
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« Reply #3 on: May 18, 2008, 11:49:32 AM »

Bluecrew, do you have your antenna mounted outside of your house or are you using an indoor antenna?

Outside, on top of garage. I'd say about 15' up.

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VTBDflyer
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« Reply #4 on: May 18, 2008, 12:27:20 PM »

I would love to hear the ground frequencies, if your close enough. But I do enjoy listening to the tower and app/dep freqs. I would love to have them either way, just to have a LAX feed.

Alex
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KSYR-pjr
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« Reply #5 on: May 18, 2008, 02:09:56 PM »

Outside, on top of garage. I'd say about 15' up.

What kind of antenna is it:  J-pole, discone, or some other?  Also, how good is the quality of the coax cable connecting the antenna to the scanner?

I don't pretend to be a radio frequency expert (although being a feeder here has provided a bit of education) but on the surface it seems to me that you should be able to pick up the ground aircraft very well being that close to the airport.  My feed is 9 miles from the airport across some rolling hills but I am able to pick up the larger jet aircraft on the ground quite well.   Given that LAX is a huge airport it is possible that even though you are two miles from the airport fence it is conceivable that you are really 6 miles from the terminal or so... but still.
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Regards, Peter
ATC Feed:  Syracuse (KSYR), NY
bluecrewfan08
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« Reply #6 on: May 18, 2008, 04:05:47 PM »

Im using a jpole and  15' of RG-58 cable. I was reading about  installign a choke at the antenna, going to try that later today after it cools off.

I drove today from my house to In N Out at the foot of 24R, and even with a zig zag route by car, it was only 1.4 miles.

If I stand at the very peak of the roof of my house, I can just make out the top of the tower.

Rob
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bluecrewfan08
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« Reply #7 on: May 18, 2008, 04:45:52 PM »

Just temporarily raised the top the antenna 5' higher. Now should be exactly in line of sight of the tower.
Interestingly enough, it made a huge improvement to the SOUTH complex . And only a little improvement to the north complex. Weird. huh

I'm going up again with pen and pad, will take down some notes. Going to scan through all the availables from here.

I'll report back with the results  grin

Rob
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tyketto
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« Reply #8 on: May 19, 2008, 01:40:45 PM »

Firstly, we will be happy with any LAX feed, you can pick frequencies for any reason you like.

An airport like LAX can generate several good streams; ideally there would be a handful of scanners, each doing their set of frequencies, see the Boston and New York sets of feeds. With less scanners you can pack the scanners, trying to get all (will result in the listener hearing a lot of snippets of conversations on different frequencies) or pick a small set of frequencies per scanner where it is easier to follow a plane in. "Tower", "Ground" and "Approach/Departure" are common selections, each with their share of fans. Two or three active frequencies per stream maximum.

I don't know how the airspace at LAX is organised, but it could be interesting to have a "Tower+Approach+Departure" feed for the North runways and a separate similar feed for the South complex.

That would be really cool, especially since the repeaters for 128.5 and 124.9 are around that area as well. Depending on how much can be dedicated to the feed, hearing Clearance Delivery would be really good, albeit slow (there's one controller there that reads clearances very slow so those international can understand them). That, or even Ground, either .65 or .75. According to their ATIS late at night, they combine on .75, so if that's doable...

BL.
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Squawk 7700
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« Reply #9 on: May 21, 2008, 11:36:30 AM »

Depending on your equipment of course (you will need two receivers), you may want to split the South and North Complex on the left and right speakers similar to my KOAK feed. This way the listener has the option to listen to either the North or South Complex by simply sliding the speaker balance control. In the meantime, just get a signal up and have Dave evaluate it. Thanks for taking on the KLAX challenge! smiley
« Last Edit: May 21, 2008, 10:01:33 PM by Squawk 7700 » Logged

Feeder:
KHWD Ground/Tower
KOAK Del/Gnd/Twr
KSFO NORCAL App Rwy 28L/R
KSFO Tower/Ground
NORCAL Approach (KOAK)
NORCAL Departure (KSFO/KOAK)
KSJC NORCAL Approach #2
ZOA Oakland Center (35/40/41)


RJTT App/Dep
RJTT Tokyo Control
RJTT Twr/TCA
bluecrewfan08
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« Reply #10 on: May 26, 2008, 01:50:02 PM »

an update.....

Was crazy busy this past week, with 3 days of travel, so not much headway.
I am however picking up a used laptop from my brother in law this afternoon, a great deal, as in free.

I talked to a comm. friend of mine,  who had some 9913 in his shop, and he promised to make me up a 30' piece with the right connectors.

So I'm hoping within the next 2 weeks to get the software for the feed, see how it goes,and give it a shot.

Hang in there guys.


Rob

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Chananya Freedman
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« Reply #11 on: May 27, 2008, 03:28:41 PM »

Thanks for the information. Keep us updated. What is "9913" and have you decided which frequencies you're putting on the feed? If you need advise, I can help. Good Job!

Chananya
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73's KI6YIL
Chananya Freedman
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Squawk 7700
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WWW
« Reply #12 on: May 27, 2008, 04:10:08 PM »

Thanks for the information. Keep us updated. What is "9913" and have you decided which frequencies you're putting on the feed? If you need advise, I can help. Good Job!

Chananya

Belden 9913 is low loss coaxial cable.
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Feeder:
KHWD Ground/Tower
KOAK Del/Gnd/Twr
KSFO NORCAL App Rwy 28L/R
KSFO Tower/Ground
NORCAL Approach (KOAK)
NORCAL Departure (KSFO/KOAK)
KSJC NORCAL Approach #2
ZOA Oakland Center (35/40/41)


RJTT App/Dep
RJTT Tokyo Control
RJTT Twr/TCA
Chananya Freedman
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« Reply #13 on: May 28, 2008, 03:14:05 PM »

Heyl Bob! I suggest using 133.9 tower north, 120.95 tower south. If anyone has access to an extra feed I would recommend 124.9 final approach south, and 128.5 final approach north.

Bob, how did you reach me through email and how do I reach you back or initiate a personal message. Thanks. Good luck with the feed.

Apologies to those who don't want this forum to be used for personal messages; I had a need.

Chananya
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73's KI6YIL
Chananya Freedman
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cactushp
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« Reply #14 on: May 30, 2008, 03:21:10 PM »

You also have to keep in mind, that the actual transmitting location is not on top of the control tower. They broadcast from a transmitter tower somewhere on the field. Does anyone know where the LAX one is?
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Scott Mulhollan
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