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| | |-+  ZNY - North Mountain
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Author Topic: ZNY - North Mountain  (Read 16829 times)
JetScan1
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« Reply #30 on: September 05, 2013, 11:00:55 AM »

Quote
I also noticed 121.325 just came alive shortly after 3:00pm.

I notice this morning (10:30 EDT) they have 121.325 turned on and simulcasting with 132.175 (all aircraft on 132.175), yesterday it was turned off when the sectors were merged.

 

   
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RonR
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« Reply #31 on: September 05, 2013, 06:13:24 PM »

Ron- Definitely interested, check it out.

I was planning on going there tomorrow to check it out but just remembered he's on vacation and won't be back until next week.  Bummer, I'll have to wait until then...

Ron
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ZBW/ZNY/ZDC (JFK Area) #1
ZBW/ZNY/ZDC (JFK Area) #2
ZBW/ZNY/ZDC (JFK Area) #3
ZBW/ZNY/ZDC (JFK Area) #4
ZBW Boston Center (CLIPR32/HTO31)
ZBW Boston Center (DXR19/SOUTHIE49)
InterpreDemon
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« Reply #32 on: September 05, 2013, 08:03:53 PM »

Ron, the transmissions are so infrequent I recommend you just leave a scanner there and record it with VOX controlled software like ScanRec on a lap-top (unless he's got a Windows box available), which you can find here:

http://www.softpedia.com/get/Multimedia/Audio/Other-AUDIO-Tools/Scanner-Recorder-Scanrec.shtml

Leave the scanner there with a whip antenna, set ScanRec up for VOX operation and see what you've got on 129.4 after a couple days. If he can pick up the ground transmissions with a whip on the back of the scanner we will be in business. It will probably not amount to more than five or ten minutes of recording per 24 hours, sometimes nothing for a day.
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KJFK ARINC
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HF CAR-A  3455/5550/6577/8846/11396
HF ARINC LDOC  6640/8933
HF NY VOLMET  6604

Complaints should be addressed to: City Hall
ferraraj
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« Reply #33 on: September 05, 2013, 11:30:30 PM »

The next immediate chore is to get another radio and stream going because you've got a hot traffic site with enough reception capability for about four feeds, not counting ARINC. It's been a black hole out there for too long and I think your feeds will be in the top fifty pretty much permanently.

I agree whole-heartedly...esp when the wx gets bad...these freqs will all be very busy and very interesting. If Loon is willing, of course...definitely split them up! I'd certainly be willing to kick in funds for that!

Dave's plan for a feed at Camelback will hopefully fill some more long-time ZNY holes!
« Last Edit: September 05, 2013, 11:33:56 PM by ferraraj » Logged

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W3MAT
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« Reply #34 on: September 06, 2013, 09:50:19 AM »

My first time posting a picture, hope this works.  Since the Arrow Yagi (tuned for amateur radio, 146mhz) is working so well, I decided to build a 3 element Yagi specifically for the aircraft band.  It is cut/tuned for a center frequency of 129.000.  Assembly is complete...  1" PVC for boom, 1/2" copper tubing for elements (spare no expense..lol), project box to house the electrical end of the project, and paint.  As you can see (hopefully), my home built Yagi is in it's primer stage.  I will post another picture after painting is complete.

Loon
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W3MAT
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« Reply #35 on: September 06, 2013, 01:06:54 PM »

The antenna is completed and in the air as of 13:00 local time.  It seems to be working as I was picking up a flight on ARINC (129.4) with a passenger experiencing chest pains.  How do you like my paint scheme?

Loon
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InterpreDemon
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« Reply #36 on: September 06, 2013, 01:45:11 PM »

You're killing yourself with that feed arrangement, Loon. You need to run the coax along or inside the boom and well back behind the reflector before it turns down. At this point I bet the antenna would work better if you rotated it 90 deg to the "flat side" (or even 45 deg with the coax exiting the boom perpendicular to the radiator and then looping back down to the mast), since you would only lose about 3db due to polarization, and right now your pattern and feed impedance is so distorted you're probably losing at least double that.

But it's a good move on the 1/2" copper, those larger elements will give better bandwidth. I use 3/4".

What model did you use? Looks like the "standard" by your spacing.

Here's a couple I did, and my preference is to mount my vertical arrays from the rear and well away from the tower or mast. If your mast is metal, you either need to side-mount that beam at least 2' from the mast, run the coax horizontally from the feed point over to the mast and then down, or mount it end-on with the reflector as far from the mast as possible, though you can plug the mast effect into your model with NEC and adjust your elements accordingly, but the effect once you get beyond 1/4 wave diminishes rapidly.
« Last Edit: September 06, 2013, 01:54:07 PM by InterpreDemon » Logged

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HF CAR-A  3455/5550/6577/8846/11396
HF ARINC LDOC  6640/8933
HF NY VOLMET  6604

Complaints should be addressed to: City Hall
W3MAT
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« Reply #37 on: September 06, 2013, 03:58:37 PM »

Yup, you're right... I was running short on time and failed to run the coax along the boom and off the back.   That will be my early morning project tomorrow, as I am stuck at work now until 23:00.   As for getting it away from the mast, that may be a bit tricky.  The antenna, although small, has some weight to it with the copper elements and box in the center, and to add a "T" to the top of the mast and then more PVC of the back of the antenna into the T, well.... I just don't know.  I may find it lying on the ground some morning.  This is the first I has a chance to listen since I put it up this afternoon, as I was really cutting it close on time, but I have to say the way it is right now it's really not doing a bad job.  I guess what I mean to say is, I don't feel I've lost anything from what was hanging up there and 128.57 sounds a little bit quieter and 121.32 a bit stronger.  I'll make the coax adjustment in the morning and see what happens.  Really guys, I think I am about finished tweaking the reception factor on the feed.  In the past week, I've been through 3, no... 4 antennas, so what ya hear now is pretty much what ya get.  I have to admit though, building the Yagi from scratch and have it work this well is pretty gratifying.  It was a two day project, but a ball of fun to build and then paint into Southwest colors.  Now if I could just build one that looked like a 737...   Hey!   Just kidding....   Have a great weekend everyone!

Loon
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InterpreDemon
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« Reply #38 on: September 06, 2013, 04:54:52 PM »

Loon, you simply HAVE to get the metal mast away from the radiator unless it is perpendicular. For example, your boom can be metal instead of PVC... no problem, but I understand why you used it (so you could use the box). If metal you just have to remember to add appx half the thickness of the boom to the length of your elements for boom correction factor. Also, the extra few feet to the very top of the mast will make no difference, so what I would do if I wanted to save that PVC boom is add a union to the back with another two or three feet of PVC, then clamp the back of it about three feet from the top of the mast and run a nice think (50lb test) mono-filament line down from the top of the mast to your feed-point box to give it some support and keep everything straight. Only other thing to do is turn that coax exit 90 deg toward the back and zip-tie it to the boom, back and down the mast...

.... simple metal tube through the back of it's neck so it can breath. No problem, lovely budgie.
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Feed Purveyor:
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(KJFK) NY DEP Liberty East
HF CAR-A  3455/5550/6577/8846/11396
HF ARINC LDOC  6640/8933
HF NY VOLMET  6604

Complaints should be addressed to: City Hall
W3MAT
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« Reply #39 on: September 06, 2013, 05:20:31 PM »

How about a piece of parachute cord instead of the fishing line?
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InterpreDemon
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« Reply #40 on: September 06, 2013, 05:35:09 PM »

Whatever... as long as it is non-metallic. I guarantee, if you get that beam mounted and fed properly you will see a big "jump" over what you've got now.
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Feed Purveyor:
KJFK ARINC
KHPN ATIS
(KJFK) NY DEP Liberty East
HF CAR-A  3455/5550/6577/8846/11396
HF ARINC LDOC  6640/8933
HF NY VOLMET  6604

Complaints should be addressed to: City Hall
W3MAT
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« Reply #41 on: September 06, 2013, 05:42:48 PM »

My gears are turning and I understand what your saying completely.  A trip to the hardware store is planned for tomorrow to get a union joint and a 3 foot piece of PVC.  I will charge up the drill tonight when I get home, and work will commence Sunday morning bright and early. 

Thanks for all your help and guidance, I greatly appreciate it.


Loon
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InterpreDemon
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« Reply #42 on: September 06, 2013, 06:09:53 PM »

No problem, anything for the best signal. Next time I am passing through we'll have to meet at the Milton truck stop.
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Feed Purveyor:
KJFK ARINC
KHPN ATIS
(KJFK) NY DEP Liberty East
HF CAR-A  3455/5550/6577/8846/11396
HF ARINC LDOC  6640/8933
HF NY VOLMET  6604

Complaints should be addressed to: City Hall
W3MAT
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« Reply #43 on: September 06, 2013, 06:13:58 PM »

Sounds like a plan
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W3MAT
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« Reply #44 on: September 08, 2013, 10:26:19 AM »

Good Morning,

Antenna work is completed.  The Yagi is now 3 feet away from the mast and coax run along the boom.  I didn;t have enough to get a loop off the back, but even with these changes I can notice a big difference.  128.575 is now pretty much full quieting.   Here's the pics...

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