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Feed Setup Pictures / Re: KAUS (#1) feeds setup
« Last post by flunkat on Today at 12:13:27 AM »
I just wanted to describe my setup (KAUS #1 feeds) in more detail since I got a couple of questions privately from others. Hopefully this info is useful to others trying to work through setup issues. If we get a discussion going it might help with my own setup issues. I’d love to learn more about everyone else’s setups. I’ve been reading the forums for new ideas. Just to introduce myself, I’m a commercially-rated pilot and an engineer, and I fly GA out of KAUS.

My site location:
-2.4 Nm from the official GPS coordinates for the field (KAUS).
-2.2 Nm from Tower and Tracon facility.
-1.6 Nm from closest facility antenna.
-Airfield elevation is on average about 500 feet MSL and my site at 430 ft MSL. I am lower than average field elevation and this has always been a problem in regards to catching ground level transmissions.

The Frequency Environment:
   -   5 approach/departure frequencies:
      -   118.15 (Southeast) rarely heard.
      -   119.0 (North and west) heavily used.
      -   120.875 (South) not used often.
      -   127.225 (East) heavily used.
      -   125.325 (Final approach) heavily used.

   -   Tower - 121.000
   -   Ground - 121.900
   -   Clearance Delivery - 125.500

   -   ATIS - 124.400
   -    FBOs - 130.225, 130.375, 130.6

My Antenna:
1/2 wave J-pole (centered on 123.0 MHz) that I constructed out of 3/4” copper tubing. Mounted on roof peak at 33 ft AGL or 466 ft MSL. Still lower than field elevation. I also built a 5-element Yagi but I’m currently not using it since its too conspicuous and I don’t want to run afoul of my community HOA rules.

Feedline and upstream setup:
- Gas tube lightning protector about 5 ft from antenna. Connected directly to ground rod with 8 gage copper. Antenna mast is also directly grounded. The two other antennas in the picture on either side of the J-pole are for ADSB. I feed Flightaware and FlightRadar24. They were interested in my location since I can provide ground level traffic data (Austin-Bergstrom currently does not have ASDE-X ground radar).
- 2 FM radio band filters in series. One from GPIO labs and a Flamingo (thanks to Dave). There are a couple of very powerful FM transmitters near my site, so these help a lot.
- Filtered low noise airband preamp from GPIO labs.
- I use just RG6Q for the feed lines (impedance is mismatched but I haven’t noticed it affecting VHF Rx). I have not measured SWRs, which probably doesn’t matter anyway since its only Rx.
- 2-way passive splitter and sent to two different setups in my house.

Demod setup #1:
- Antronix 8-way lossless splitter/amp.
- 4 x Nesdr Smart SDRs (supplied by Dave)
- Powered USB hub (supplied by Dave)
- Raspberry Pi running rtl_airband (supplied by Dave)
- Details about rtl_airband configuration available on request. I worked a lot on this including looking at the source code to understand some parameters.

Demod setup #2:
   - Antronix 8-way lossless splitter/amp. Grounded to power supply to remove ground loops.
   - 4 x RTL-SDR Blog V3 SDRs, attached via powered USB hub to a Linux machine
   - rtl_airband on Linux machine  (details of config/settings available on request)
   - 4 x Uniden Bearcat BC355N radios

Uniden Bearcat hardware radios setup:
   - 4 x Line-to-mic level attenuation cables for audio out (-35dB)
   - 4 x ground loop isolators
   - 4 x Roccat Juke USB sound cards
   - These are plugged into a Linux box running darkice (details of config/settings available on request)
   - 4 hardware radios cover the following frequencies
      (1) Scan mode, all approach frequencies (118.15, 119.0, 120.875, 125.325, 127.225)
      (2) Ground control (121.9)
      (3) Tower (121.0)
      (4) Clearance Delivery (125.5)

I do also have an SDRPlay RSPDuo which I normally play around with, but its been a hassle trying to get it to work consistently on Linux with SoapySDR. The 10Mhz sample rate is amazing though.

Would love to hear from others with ideas. FYI, I’m not proficient in radio stuff. I’m not a HAM operator nor am I an electrical engineer. I’m an Aerospace and Software engineer. I’m also a commercially-rated pilot with a passion for anything aviation.
Listener Forum / Re: is this really worth it?
« Last post by dave on January 20, 2022, 01:22:10 PM »
Things are not always what they seem. :-)

Many or all of the feeds like the ones you refer to are provided by SDR receivers which are already covering other frequencies (more "valuable" ones). So they essentially come for free - so why not have them?
Listener Forum / is this really worth it?
« Last post by Chananya Freedman on January 20, 2022, 01:08:52 PM »
i start every morning by looking at the website home page to see what the new feeds are. as i look this morning, i see some feeds for Austin FBOs. is that kind of thing really worth it? is it busy enough to get a lot of listeners? this is not a complaint. i just find it a little strange. comments will be appreciated.   

A teenage pilot has become the youngest woman to fly solo around the world, landing in Belgium after an epic five-month journey.

Zara Rutherford touched down in the town of Kortrijk, 90 kilometres west of Brussels, on Thursday afternoon - the same airfield where she embarked on her journey last August.

At 19 years old, the British-Belgian pilot is 11 years and 11 months younger than American Shaesta Waiz who was 30 when she set the existing record for the youngest woman to circumnavigate the world solo back in 2017.

“Growing up, I didn’t see many other female pilots. I always thought that was really discouraging,” Zara Rutherford told reporters after landing her single-seater Shark sport aircraft at Egelsbach, an airfield a few kilometres from Frankfurt Airport, Germany’s busiest.

“So I’m hoping to encourage more girls to go into aviation and kind of show a friendly face, so that if a girl likes aviation and she sees me, she knows she’s not the only one."  Rutherford’s route around the world took her across Iceland to Greenland and down the east of Canada and the USA through Central America to Colombia then back north to Alaska.

She flew over Russia, Korea, Indonesia and India to the Middle East before heading back to Europe in her Shark Aero aircraft which is designed in Czechia and built-in Slovakia. It can reach speeds of up to 295 kilometres per hour.  Along the way, Rutherford had to deal with biting cold over Russia and narrowly avoid North Korean airspace.

The teenager has recently completed her high school studies in mathematics, economics and physics and hopes to study computer science or computer engineering at university.

“In both aviation and STEM (science, technology, engineering, mathematics) the gender gap is huge” Rutherford wrote on her website.

“My aim is to encourage girls and young women to pursue their dreams and promote aviation and STEM-related careers. Only 5% of commercial pilots and 15% of computer scientists are women.”
Aviation News (General) / Nearly home: Teen pilot lands in Germany on global flight
« Last post by KB4TEZ on January 19, 2022, 10:55:28 AM »

EGELSBACH, Germany (AP) — Teenage pilot Zara Rutherford landed in Germany on Wednesday on the penultimate stop of her bid to become the youngest woman to fly around the world solo.

Hopefully one day away from sealing the record, the Belgian-British 19-year-old said that she’s looking forward to getting home after “a long five months.”

Rutherford is due to land Thursday in Kortrijk, Belgium, where she embarked on her trip on Aug. 18. American aviator Shaesta Waiz was 30 when she set the existing record for the youngest woman to circumnavigate the world solo in 2017.

“Growing up, I didn’t see many other female pilots. I always thought that was really discouraging,” Rutherford told reporters after landing her single-seater Shark sport aircraft at Egelsbach, an airfield a few kilometers from Frankfurt Airport, Germany’s busiest. “So I’m hoping to encourage more girls to go into aviation and kind of show a friendly face, so that if a girl likes aviation and she sees me, she knows she’s not the only one.”

She was initially supposed to finish her trip on Monday, but bad weather has caused several delays during the journey.

Rutherford’s flight saw her steer clear of wildfires in California, deal with biting cold over Russia and narrowly avoid North Korean airspace. She said she’s “really excited” to get home.

“Now to think that I’m home tomorrow, I don’t think I’ve processed it — it still feels strange, I still feel like I should be months away,” she said. “I’m happy that I’ve done it, but it’s been really difficult.”

“There’s been amazing moments, but then there’s been moments when I have feared for my life and I would not want to do that again,” Rutherford added.

“Once I’m home, I think I’m going to sleep for about a week” and then talk about her experiences, she said. She hopes to go to university to study engineering in September, in the U.K. or the U.S.

The men’s record for the youngest solo round the world flight is held by Travis Ludlow of Britain, who set that benchmark last year at 18.
Feed Setup Pictures / KAUS (#1) feeds setup
« Last post by flunkat on January 18, 2022, 04:29:26 PM »
My setup for KAUS #1 feeds. Mix of SDRs and Bearcat BC355N radios.

Washington (CNN Business)AT&T announced Tuesday that it would delay activating 5G on some towers around certain airports. The wireless technology's rollout near major airports had been scheduled for Wednesday, but airlines warned of dire consequences for transportation and the economy.

The wireless company made the announcement as it works with the aviation industry and the US Federal Aviation Administration for further information, according to a statement from AT&T spokesperson Megan Ketterer.
"We are frustrated by the FAA's inability to do what nearly 40 countries have done, which is to safely deploy 5G technology without disrupting aviation services, and we urge it do so in a timely manner," the spokeswoman said.
AT&T (T), which owns CNN's parent company, will continue to launch advanced 5G services everywhere else as planned.

The Biden administration said earlier Wednesday it was "actively engaged" in finding a solution to Wednesday's planned 5G rollout that airlines say cause safety problems that will lead to major flight delays.A White House official tells CNN that the administration is talking with the FAA, Federal Communications Commission, wireless carriers, airlines and aircraft equipment manufacturers to find a solution that still allows the rollout without sacrificing the safety of flights.

In a Tuesday letter, CEOs from 10 airlines told the Biden administration to push back the already-delayed rollout. Airlines estimate 1,000 flight disruptions per day because of possible interference with radar altimeters that pilots use to land in low visibility conditions. The telecom industry has not commented on the letter, but has said fears are unfounded since there have not been problems in other countries where 5G is already deployed.
A source familiar with the discussions tells CNN that right now talks are centering on establishing a buffer at key airports, allowing roughly 90% of 5G towers to be deployed. If agreed to, officials predict the cancellations could be avoided and impacts to the traveling public -- while not eliminated -- would be reduced.
Listener Forum / KPHF
« Last post by SkyHawk68A on January 18, 2022, 11:48:35 AM »
Is there a way to remove Norfolk's (KORF) frequencies from the KPHF (Newport News Ground/Tower) channel? It often gets garbled with the local traffic on this station. And many times, doesn't even broadcast KPHF's traffic and only does KORF.

Aviation News (General) / 5G - This is getting intense -
« Last post by KB4TEZ on January 18, 2022, 06:53:02 AM »

The airline industry on Monday called on the Biden administration to block any 5G wireless transmission within a two mile radius of airport runways, citing the potential for thousands of flight cancellations and disruptions once the technology is switched on in just days.
Airlines for America, which represents most of the airline and cargo industry, warned that the 5G activation set to go live Wednesday will disrupt thousands of passengers and cargo shipments despite workarounds put into place by the Federal Aviation Administration to minimize interference where possible.
A letter obtained by POLITICO, calling for the action was signed by CEOs of Delta Air Lines, United Airlines, American Airlines, FedEx and UPS’ airline units, among others, as well as the head of A4A.

“Immediate intervention is needed to avoid significant operational disruption to air passengers, shippers, supply chain and delivery of needed medical supplies” such as vaccines, the officials said in the letter, addressed to National Economic Council Director Brian Deese, Federal Communications Commission Chair Jessica Rosenworcel, Transportation Secretary Pete Buttigieg and FAA Administrator Steve Dickson.

The letter urged the officials to “take whatever action necessary” to make sure that 5G is not deployed in places where air traffic control towers are too close to runways, until the FAA can figure out how it “can be safely accomplished without catastrophic disruption.”

The CEOs said that airplane manufacturers have told them that absent remediations, “huge swaths of the operating fleet that may need to be indefinitely grounded” and that tens of thousands of Americans could get stranded overseas.

Airline executives say 5G rollout will cause significant flight disruptions---------------------------WASHINGTON (TND) — The countdown to what airline executives are calling a “catastrophic” crisis is on.

On Wednesday, AT&T and Verizon will roll out the first 5G C-band towers and airlines say the service could make a large number of airplanes unusable, stranding travelers and worsening supply chain issues.

The Federal Aviation Administration says instruments like altimeters, which measure an aircraft’s distance from the ground, may be affected by 5G interference as well as low-visibility operations.

So far, only 45% of commercial planes have been cleared to perform low-visibility landings at airports near new 5G towers. The FAA says the move opens up runways at as many as 48 of the 88 airports most directly affected by interference.   But airlines say that does not include many major hubs.

"Even with the approvals granted by the FAA today, U.S. airlines will not be able to operate the vast majority of passenger and cargo flights due to the FAA's 5G-related flight restrictions unless action is taken prior to the planned Jan. 19 rollout," said trade group Airlines for America, which represents several major airlines.

In a letter to federal officials obtained by Politico, Airlines for America said, “The ripple effects across both passenger and cargo operations, our workforce and the broader economy are simply incalculable. Every one of the passenger and cargo carriers will be struggling to get people, shipments, planes and crews where they need to be. To be blunt, the nation’s commerce will grind to a halt.”
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