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| |-+  Feed Setup Pictures (Moderators: dave, RonR)
| | |-+  KMEM / KACY Feeds
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Author Topic: KMEM / KACY Feeds  (Read 1309 times)
bugalou
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« on: November 28, 2014, 06:47:00 PM »

Hello everyone.  I provide the feds for KMEM (Memphis International Airport) and KACY (Atlantic City International Airport and the 177th ANG fighter wing).  Below are some basic pictures of the feed.   KMEM is hosted at my parent's house just outside of Memphis, and I host KACY at my house in south Jersey.  Both feeds are very simple consisting of a few scanners and a Raspberry Pi providing the stream.  Thanks to Dave for all the help getting these up, and thanks to all my frequent listeners.  Please follow me on Twitter @hgbugalou for the latest on all the feeds I provide.



KACY:







KMEM





« Last Edit: November 28, 2014, 06:55:06 PM by bugalou » Logged
verbatim
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« Reply #1 on: December 01, 2014, 12:16:10 AM »

awesome, it's possible an antenna close-up picture? is the antenna homebrew??
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bugalou
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« Reply #2 on: December 06, 2014, 08:06:06 PM »

awesome, it's possible an antenna close-up picture? is the antenna homebrew??

I can try when the weather clears out here.

It is a custom made Arrow antenna (http://www.arrowantennas.com/).  I have the same model for the KMEM feed in my parent's attic.  I did an outdoor setup here to try and pickup an NY center feed I am right on the fringe off.  KACY is less than 2 miles from my house and I could probably pick it up with a cloths hanger  cheesy .
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viista
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« Reply #3 on: December 15, 2014, 08:08:58 PM »

Great setup! What kind of USB audio converter(blue box) used on KACY feed? Mind sharing with some technical info?

Thanks

Jeff
WMKB

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dave
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« Reply #4 on: December 20, 2014, 06:31:03 AM »

Great setup! What kind of USB audio converter(blue box) used on KACY feed? Mind sharing with some technical info?

Thanks

Jeff
WMKB



Jeff-

We generally use one of the two audio interfaces on feeds that LiveATC helps with:

http://www.amazon.com/gp/product/B009NVS6KS/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1

We also use the Griffin iMic - available from various sources.

One reason is that these cards have a proper Line In interface which presents the proper impedance to a scanner's audio output.  The other reason is that these cards have tested out pretty well in audio quality tests.

The cheap $1USD audio interfaces that exist can be made to work - you just have to either very tightly control the scanner volume so as not to overdrive them or provide your own impedance matching network so as not to overdrive the mic level input of those cards.

Dave
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InterpreDemon
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« Reply #5 on: December 20, 2014, 01:42:41 PM »

My only suggestion, FWIW, would be to rotate that antenna to horizontal or end-mount it from the handle if you want to stay with vertical polarization. Having the driven element right next to the mast is killing the gain and pattern, not to mention making any setting of that gamma match moot once mounted to the mast. Ideally you would pull that rubber handle off, add a foot or two of tubing and mount vertically with the reflector element at least a foot away from the mast. The coax from the driven element would then be strapped to the antenna boom, fed straight back to the mast and then down. Here's an example of the ideal mounting for vertical arrays:
« Last Edit: December 20, 2014, 01:45:08 PM by InterpreDemon » Logged

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
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