SF-HAB New YouTube Channel

SF-HAB now has a new YouTube channel that will include videos and other media for sharing with the public. The channel name is: sf-hab.

The web link to the channel is https://www.youtube.com/@sf-hab

Video playlists are available via the link: https://www.youtube.com/@sf-hab/playlists

The video from the January 2023 meeting is at: https://www.youtube.com/watch?v=_BhDF22BlV0

SF-HAB January Meeting Remote Zoom


Please join SF-HAB for the January 2023 remote zoom meeting. The meeting time is this coming Tuesday, January 10, 2023 at 7PM Pacific time.


See below for the Zoom meeting details and how to join. We will have an opportunity to meet any new folks and also chat about current and future projects. Potential topics are listed below:


  • New Tracker/Kazu
  • Solar Array/David, Beau, Rikke
  • Manufacturing Trackers/Beau
  • Controllable Altitude Balloon/Martin, David
  • Lightweight Crossband Repeater/Martin
  • Chabot Space and Science Center/Martin
  • Calaveras County Public Schools/David
  • Drone Rules Explained/Robert
  • Stuff I’m Forgetting/Everyone

Help Needed

  • SF-HAB Web Page- More New Stuff – Stabilized Payload

Zoom Meeting Connection Details

Robert Graf (he/him) is inviting you to a scheduled Zoom meeting.

Topic: SF-HAB January Meeting (Remote Zoom)
Time: Jan 10, 2023 07:00 PM Pacific Time (US and Canada)

Join Zoom Meeting

Meeting ID: 889 7036 7411
Passcode: 425887
One tap mobile
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Meeting ID: 889 7036 7411
Passcode: 425887
Find your local number: https://us02web.zoom.us/u/keCFzqleen

HabHub is shutting down but SondeHub will replace it

HabHub has been provided by Anthony Strik since 2011 – thanks Anthony! The HabHub Tracker, Predictor and Curst Calculator are now located on SondeHub. Thanks to Amateur Radio Digital Communications (ARDC) for supporting SondeHub!


Falling from the Sky: Chasing WX Balloon Transmitters

Beau, K6EAU
Rikke, KN6KZF
Steve, K6WW


Beau, Rikke, and Steve will share their experiences and antics of chasing WX balloons. There are thousands of balloons launched twice a day, at the same time, from sites all over the world, carrying radiosondes to capture and transmit weather data to ground stations. During their roughly two-hour flight, their diameter grows to over 25 feet and they rise to above 100,000 feet when they burst and drop back to earth. Since the radiosonde transmits a tone on UHF, just under the ham band, for about 8 hours, chasing and recovering the payload has become the ultimate T-hunt. 

Amateur Operators KN6KZF & K6EAU (a.k.a. Rikke & Beau) enjoy cruising the air waves as a conveniently socially distanced hobby. They have enjoyed reaching out from lighthouses, mountain tops, national parks and even via the International Space Station. Combining the fun of geocaching, balloons and radios has led to a great way to spend time together and get outdoors both launching and recovering various devices. Most recently that involved running Ground Control for Parachute Mobile Mission 42 while 3 skydivers made successive jumps to make both VHF and HF radio contacts while descending from over 10,000 feet under chute. 

Steve Wilson, K6WW, is a native Californian who has lived in the SF Bay Area for the last 33 years. Steve’s godfather, Alan Young (SK K6KLL), a former broadcast engineer, got him into the hobby in 2001 when Steve got his Technician license. He upgraded to General in 2010 and Extra in 2016. He’s a former ARES Emergency Coordinator for Fremont and former President (2014-2016) and current Vice President (2023) of the South Bay Amateur Radio Association (SBARA). He’s also a member of the Parachute Mobile support team.

For more info PAARA – Home Page

Our First Latex Floater

Most latex balloons are used to rapidly ascend to burst altitude and land gracefully with a parachute (aka burster, pop & drop, etc.) We tried something different. Last Sunday we tried a latex balloon for a high altitude float: K6RGG-14. It was a 100g Hwoyee with 5 g of net lift. The payload was 20 g due to heavier antenna wires. It took off with a ~ 2 m/s and gradually leveled out at ~50 K’. Next time we’ll use APRS to keep tabs better. One possibility for a next flight is adding a valve to release gas once a vertical altitude is reached. Note on the second day it traveled much less as it was higher up. Latex balloons can carry a much heavier payload which will allow more interesting contents like a crossband repeater and other fun instruments.

Video courtesy of K6EAU
Video courtesy of K6EAU

Launch on November 13th at 9am

We’re launching a balloon this Sunday morning, November 13th at 9:00 AM pacific time. If you’re in the area and would like to see the launch, please join us at the Cannery Park in Hayward, CA. See the map link below for the exact location.

HAB Launch Site On Google Maps