Home

Details

Our club station (site 530) is in the Stanford Foothills, accessible by the dish trail. Click the image above to view a map.  

Welcome to the Stanford Amateur Radio Club, W6YX!

Next Meeting Date:
Time:
Topic:
Meeting link:

To navigate this site, please click on the Main Menu links to your right.

Details
May the 4th be with you! For this month's meeting, Hiroki Kato AH6CY will give a talk about potato-powered radios.
 
 
What: Potato-Powered QRPp radio
When: Tue May 10, 7:30PM
 
See below for details.
 
Overview:  The talk recounts an experiment in using fruit and vegetable to power practical transceivers. It discusses how much electric energy various fruits and vegetables can generate and how to build QRPp radios.
 
About the speaker: Born in Hiroshima, Hiroki Kato was first licensed as JA4AAO when he was in high school there. He came to the US in 1966 to pursue graduate studies. Dr. Kato taught political science and linguistics at the Univ of Hawaii, Northwestern and Harvard. He came to Silicon Valley in the 1990s to work for early startups. He enjoys QRP portable ops, casual HF DX and digital modes. He collects and restores boat anchor radios, including WWII-era radios. His book The Paraset Radio: the Story of a WWII Spy-Radio and How to Build a Replica was recently published by the RSGB. His two sons attended Stanford and one of his grandsons is currently a freshman at Stanford.
 

 

Details
 
For the April meeting of the Stanford Amateur Radio Club, we will have an invited talk by Mike Lavelle K6ML about 122 GHz radios. Please see below for details. Apologies for the late notice!
 
What: Building and Operating 122 GHz Radios
When: Tue April 12, 7:30 PM PDT
Password: 561227
 
 
Overview
I will give a brief overview of the microwave spectrum and who's using it, then will describe radar sensor MMIC technology and how we repurposed it as a ham radio transceiver.   Next, the radio system budget (SNR = system gain - path loss) and how better antennas lead to greater range.  Finally, a discussion of the contributors to path loss and how path (and weather) selection led to a new distance record for this band.  Along the way, we'll learn about several radios based on the radar MMICs, including the very popular VK3CV design (about 500 units shipped to hams world wide) and the 122 GHz beacon at the W6YX site.
 
About the Speaker
Mike Lavelle (K6ML) started out on HF and 2m as WN2ZHL in high school, and then studied microwave semiconductor design in college.  As a co-op student at COMSAT Labs he built 7 and 14 GHz propagation beacons for early communications satellites.   At some point, he was mesmerized by the new 8 bit microprocessors and switched to designing computer display terminals in Silicon Valley, eventually becoming a 3-D graphics hardware architect at Sun Microsystems and later pushing some more pixels around at Silicon Image.   Now that he's retired, he's reverted to tinkering with ham radio, HF thru mm waves.

 

Details
Who: Andy Do and Patrick van Eijk

What:


Decentralized Wireless Networking with Helium and LoRaWAN
Where:   Zoom (link)
Password: 139906
When:
Tues, Feb 8th,
7:30pm PT

 

Andy Do
President at Embedded Works / SensorWorks		 Patrick van Eijk
Director of LoRa Business Development at Semtech

--------------------

Talk Summary:

What do you get when you utilize blockchain Decentralized Finance (DeFi) and cryptocurrency to build one of the fastest-growing wireless networks?
How would you build a global IoT wireless network in a matter of years, not decades, and at a fraction of the cost of traditional mobile carriers who might spend billions to buy spectrum, build cell towers, and gain subscribers?

The answer is the Decentralized Wireless (DeWi) movement which is growing at breakneck speeds.
At the center of this movement is the Helium blockchain, which is powered by the LoRaWAN wireless protocol that has seen tremendous growth in IoT applications.
The Helium DeWi model has amassed legions of crypto mining fans, and its “hotspot miners” have been deployed worldwide.

We’ll explore the benefits of a DeWi network and the multitude of Helium IoT applications used in small business to big city projects.