Toots for K4HCK@mastodon.radio account

Written by Cale K4HCK on 2025-01-19 at 22:22

The new ADS-B antenna has resulted in double the position reports compared to the old antenna.

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Written by Cale K4HCK on 2024-12-25 at 16:07

Only one ISS pass for this area today, but it was a successful one!

Recording audio in the moment and decoding later is the way to go. #SSTV

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Written by Cale K4HCK on 2024-12-24 at 00:54

Anyway, the goal is to get in the backyard with an HT and yagi for the upcoming ISS SSTV event. Thinking about using the Sony pocket recorder to record the audio. I'm guessing that will be easier than trying to decode with the iPhone in real time.

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Written by Cale K4HCK on 2024-12-24 at 00:50

Been experimenting with SSTV decoding. The best decode in this example is a direct capture from the FT-857 + SignaLink w/ QSSTV app.

The worst capture is holding an iPhone up to the 857’s speaker decoded with Black Cat’s app.

Oddly, the mid quality is from holding a Sony pocket recorder next to the 857’s speaker then playing the recording back to the iPhone and Black Cat’s app.

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Written by Cale K4HCK on 2024-12-14 at 23:05

Headed over to the Nashville Amateur Radio Club’s space to help celebrate their 90th year!

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Written by Cale K4HCK on 2024-10-24 at 03:07

Weather service be harsh.

We haven't had rain since September 30th.

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Written by Cale K4HCK on 2024-09-25 at 19:17

The other major issue to keep in mind is that all these services, LoTW, etc., are running with no redundancy, currently. So a bad power surge or a dead hard drive platter, and these things are all toast.

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Written by Cale K4HCK on 2024-09-25 at 19:14

If you've spent any time in IT or development, this is really tough to watch. ARRL director goes into detail on the issues leading up to the ransom payment, and what they're still dealing with.

• LoTW runs on CentOS 6 (5 years out of support)

• No backups (which forced their hand to pay ransom)

• DX system ran on Win98 (can't source that OS, currently)

Discussion starts at about 16 minutes into the video.

https://youtu.be/DMjwQIsybAQ?t=960

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Written by Cale K4HCK on 2024-09-20 at 05:09

And finally, this is what a 10,000 watt dummy load looks like

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Written by Cale K4HCK on 2024-09-20 at 04:41

The engineer giving the tour worked there for 33 years. Talked about how small and incredibly reliable systems are now. This is a 6 piece modular amplifier. 5 modules can go down and the transmitter keeps working (at lower power output).

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Written by Cale K4HCK on 2024-09-20 at 04:38

Massive prep occurs before and during the airing of the Super Bowl because it’s such a huge revenue generator from the commercials.

Generators are tested. All engineers are on site the day of. They even keep the backup transmitter running into a dummy load.

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Written by Cale K4HCK on 2024-09-20 at 04:35

On to the tower and transmitter a short walk next door!

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Written by Cale K4HCK on 2024-09-20 at 04:23

Master control used to be run remotely out of Atlanta but the new station owners brought it back local.

During the Christmas bombing that caused a major AT&T outage, the station couldn’t get on the air because the fiber lines to Atlanta were down

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Written by Cale K4HCK on 2024-09-20 at 01:00

Master control and the newsroom.

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Written by Cale K4HCK on 2024-09-19 at 03:57

What are the chances that wide spectrum SDRs were recording in the Lebanon area and captured the trigger signal?

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Written by Cale K4HCK on 2024-09-19 at 03:55

Almost certainly the offending government was able to intercept the supply lines of Hezbollah to modify devices and achieve these highly targeted attacks. It's unlikely random devices on eBay contain this sophisticated modification.

I'd be interested in the setup used to trigger the HT based explosions. Did they use ham bands? Were the devices modified to accept a separate signal on a different band? Did the HT have to be powered on?

A lot of design and effort went into this.

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Written by Cale K4HCK on 2024-07-30 at 13:46

Did you know the North Fraser Amateur Radio Club was founded in 1473? https://www.ve7nfr.com/index.html

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Written by Cale K4HCK on 2024-07-19 at 21:50

If you're in the DC area, NPR is auctioning off a boatload of broadcast equipment and general IT related items. Even some ham gear in there. Looks like it's local pickup only: https://rasmus.com/auctions/LbP63ahoGy8AwhIwx1dU/a/Broadcast-IT---A-V-Studio-Equipment-Washington--DC

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Written by Cale K4HCK on 2024-07-18 at 15:25

Middle Tenneessee HamQuest is this Saturday! Maybe the best hamfest of the region outside of Huntsville?

(Of course, I'm out of town again this weekend and have to miss it. 😢 )

https://midtnhamquest.com/

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Written by Cale K4HCK on 2024-06-28 at 15:54

Anyone have direct contact with M0AWS? Been trying to join the Matrix server for a while and keep getting the same error. Curious if he has any insight on his end.

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