SBARC-list

sbarc-list@lists.netlojix.com

5 participants
2687 discussions

Start a nNew thread

EARLY AMATEUR STATIONS
by Bob Bascom 08 Oct '18

08 Oct '18

EARLY AMATEUR STATIONS When Spark Was King: http://www.sowp.org/early-amateur-stations/

1 0

More information on ARRL and the N6AA censure
by Jay Hennigan 08 Oct '18

08 Oct '18

As many of you are aware, the SW Division Director N6AA was censured (in my opinion very unfairly) purportedly in regard to his remarks at the 2017 Visalia DX Convention. This was due to a discussion at the ARRL forum about the recently and stealthily adopted ARRL board of Directors code of conduct which severely limits what ARRL Directors can share with membership about Board decisions. Other underlying issues are ARRL's actions with regard to NTS and the language of the Amateur Radio Parity Act for which ARRL has been lobbying. This has been interpreted to be in favor of HOAs and severely limiting with regard to amateurs' ability to put up antennas in HOA communities. Documents showing the toxic atmosphere at ARRL HQ and the ongoing tactics of the E&E committee to disqualify candidates with dissenting views have been made available at http://kkn.net/n6aa/arrlcensure/ . All five districts open for election have contested elections this year with challengers calling for more transparency and openness on the part of the ARRL Board. For what it's worth, I'm on the side of N6AA and the challengers. -- Jay Hennigan - CCIE #7880 - Network Engineering - jay(a)impulse.net Impulse Advanced Communications - http://www.impulse.net/ Your local telephone and internet company - 805 884-6323 - WB6RDV

2 1

Space X Launch
by Levi C. Maaia, K6LCM 07 Oct '18

07 Oct '18

Did anyone else catch the incredible SpaceX Falcon 9 launch tonight? These images taken from Santa Barbara Mesa show the launch sequence including separation of the first stage which then landed back at Vandenberg Air Force Base. It appeared as if a gaseous cloud from deep space was suddenly transported to fill a quarter of the night sky At one point after the separation of the first stage, there was a ripple effect that almost made it look like you were seeing a visual representation of radio waves coming off of the rocket. See cropped image. I’m not sure what caused that effect but it was interesting to see. LCM Levi C. Maaia, K6LCM Director at Large | Co-Chair, Telecommunications Services Committee Santa Barbara Amateur Radio Club, Inc. a 501(c)(3) nonprofit public benefit corporation www.levi.maaia.com +1.805.604.5384

2 1

It's official!
by Jay Hennigan 04 Oct '18

04 Oct '18

Today is Citizen's Band Radio Day. -- Jay Hennigan - CCIE #7880 - Network Engineering - jay(a)impulse.net Impulse Advanced Communications - http://www.impulse.net/ Your local telephone and internet company - 805 884-6323 - WB6RDV

4 4

2019 SW Division Convention - Yuma
by Marvin Johnston 03 Oct '18

03 Oct '18

This just came in from the SW Division e-communicator. The Yuma Hamfest URL is: http://www.yumahamfest.org/ This has been one of the most fun hamfests I've attended, and highly recommend it! Marvin KE6HTS ********** 2019 Southwestern Division Convention - Yuma In 2019, the Yuma Hamfest, on February 15 and 16, will again be the ARRL Southwestern Division Convention. This is the convention that has rotated through the sections, and was conventionally held in September. There will not be another Southwestern Division convention in September in 2019 as no other groups have stepped up to sponsor such an event.

1 0

Updating the repeater list
by Stephen Pope 01 Oct '18

01 Oct '18

Hello all, Who has updates to the local repeater list? I'm attaching my latest version below as a CSV file -- good for printing via any spreadsheet program or for import into CHIRP for programming your radio. I also have a new list from Avi of the Ventura repeaters, and there's a page with the data of the new Ventura repeaters (work in progress) at https://www.pvarc.club/repeater-systems/ <https://www.pvarc.club/repeater-systems/> Does anyone know of missing or stale links in my list? If you let me know, I'll distribute an updated version. Stephen Pope (W6STP) ---- -- Stephen Travis Pope Santa Barbara, California, USA http://HeavenEverywhere.com <http://heaveneverywhere.com/> http://FASTLabInc.com <http://fastlabinc.com/> https://vimeo.com/user19434036/videos <https://vimeo.com/user19434036/videos> http://heaveneverywhere.com/Reflections

2 1

AIS
by Bill Talanian 30 Sep '18

30 Sep '18

AIS availability and system range. My thanks to all site techs for making this happen. Note the factor of ducting at 160 MHz which allows periodic openings out to 750 statute miles. 1360 is Santa Ynez Peak 533 is La Vigia Bill [MarineTraffic] <http://post.spmailtechno.com/f/a/4dYmctOTrkjkn8mp_KblPQ%7E%7E/AABDiQA%7E/Rg…> Dear William B. Talanian, Thank you for contributing to this ever-growing crew with your data! Thanks to your efforts, station 1360 <https://www.marinetraffic.com/en/ais/details/stations/1360>, Santa Barbara accomplished the following stats: * 100% availability * 648 NM range * 12186.6 km^2 coverage You rock! Keep up the good work! Here's a link <https://help.marinetraffic.com/hc/en-us/articles/216304857-Installation-Gui…> to some tips on optimising your setup. Don't hesitate to reply to network(a)marinetraffic.com for additional help. Cheers! MarineTraffic Network Team ------------------------------------------------------------------------ Dear William B. Talanian, Thank you for contributing to this ever-growing crew with your data! Thanks to your efforts, station 533 <https://www.marinetraffic.com/en/ais/details/stations/533>, Santa Barbara accomplished the following stats: * 100% availability * 637 NM range * 11171 km^2 coverage You rock! Keep up the good work! Here's a link <https://help.marinetraffic.com/hc/en-us/articles/216304857-Installation-Gui…> to some tips on optimising your setup. Don't hesitate to reply to network(a)marinetraffic.com for additional help. Cheers! MarineTraffic Network Team Support <http://post.spmailtechno.com/f/a/ei8SCEjIpR5G6N_R-f88zQ%7E%7E/AABDiQA%7E/Rg…> | Forums <http://post.spmailtechno.com/f/a/0d_Xl-lpneYzAXLFBnoAhw%7E%7E/AABDiQA%7E/Rg…> | My Account <http://post.spmailtechno.com/f/a/sRnCS8XUjil0gBhwO3-uLg%7E%7E/AABDiQA%7E/Rg…> | Live Map <http://post.spmailtechno.com/f/a/4dYmctOTrkjkn8mp_KblPQ%7E%7E/AABDiQA%7E/Rg…> | Vessels database <http://post.spmailtechno.com/f/a/x7E0DMdBWsJ2RMXZXHs_pw%7E%7E/AABDiQA%7E/Rg…> © MarineTraffic.com, 2007 - 2018 MarineTraffic on Facebook <http://post.spmailtechno.com/f/a/sDJhK0-PuL20aj1ErBZHxA%7E%7E/AABDiQA%7E/Rg…> MarineTraffic on Twitter <http://post.spmailtechno.com/f/a/Q56bZV4K7rkkgLh1kZJcBA%7E%7E/AABDiQA%7E/Rg…> MarineTraffic Google+ Page <http://post.spmailtechno.com/f/a/OBrZyvqLprmb8TPEsUx7kw%7E%7E/AABDiQA%7E/Rg…> MarineTraffic LinkedIn Profile <http://post.spmailtechno.com/f/a/1QOBrNkk0hULIM7Ux1G92Q%7E%7E/AABDiQA%7E/Rg…>

1 0

A new antenna using single atoms could usher in the age of atomic radio | Ars Technica
by Brian Milburn K6BPM 19 Sep '18

19 Sep '18

https://arstechnica.com/science/2018/09/a-new-antenna-using-single-atoms-co… A new antenna using single atoms could usher in the age of atomic radio The team tested their device by recording themselves singing "Mary Had a Little Lamb" Jennifer Ouellette - 9/19/2018, 6:18 AM Enlarge / Zapping a vapor cell of excited cesium atoms with lasers makes an excellent detector of radio waves. Rydberg Technologies In the 1950s, atomic clocks revolutionized precision time-keeping. Now we may be on the verge of so-called "atomic radio," thanks to the development of a new type of antenna capable of receiving signals across a much wider range of frequencies (more than four octaves) that is highly resistant to electromagnetic interference. An antenna is typically a collection of metal rods that pick up passing radio waves and convert their energy into an electrical current, which is then amplified. One might argue that the good old-fashioned radio antenna has served us well since the dawn of the 20th century, so why do we need anything to replace it? According to David Anderson of Rydberg Technologies, those antennae are wavelength-dependent, so their size depends on whatever wavelength of signal they are trying to measure (they need to be about half the size of whatever wavelength they are designed to receive). That means you need antennae of several different sizes to measure different radio frequencies. Anderson is a co-author of a new paper posted to the arXiv describing a novel alternative to conventional antennae, based on vapor cells filled with a gas of so-called "Rydberg atoms." That just means the atoms are in an especially excited state, well above their ground (lowest-energy) state. This makes them especially sensitive to passing electric fields, like the alternating fields of radio waves. All you need is a means of detecting those interactions to turn them into quantum sensors. "You can design the receiver to operate at whatever frequencies you want and avoid intentional electromagnetic interference much more easily." The Rydberg Technologies team realized they could zap their vapor cells filled with excited cesium atoms with laser light tuned to just the right critical frequency. This saturates the atoms so they can't absorb any more light, such that a second laser beam can pass right through them, effectively making the gas transparent. The critical frequency at which this transition happens will change in response to a passing radio wave, so the light from that second laser beam will flicker in response. The vapor cell becomes a purely optical radio wave detector, with no need for any wires or circuitry. Plus it's capable of measuring pulsed and modulated RF fields, according to Anderson, which is how information is transferred across the airwaves. They have already tested the concept with AM and FM microwaves to transmit recordings of various team members singing "Mary Had a Little Lamb"—a nod to Thomas Edison, who sang the same song when he invented the phonograph in 1877. The all-optical nature of the vapor cells means that even if they are hit with a massive burst of electromagnetic radiation, like that from a solar flare, they won't be permanently damaged because there is no circuitry to fry. This is a major concern for the electrical grid or certain defense systems and satellites. An atomic antenna would also be less vulnerable to the recent spate of suspected microwave attacks at US embassies in Cuba and China. And the cells are ideal for secure communications. "You can design the receiver to operate at whatever band or whatever frequencies you want and avoid intentional electromagnetic interference much more easily," says Anderson. The detector cells are quite small, merely millimeters in size, with potential to scale them down even more. However, they require a significant backup system to operate, which has not been miniaturized. "You're not going to have a radio receiver that fits into a car dashboard today," says Anderson. "But the atomic clock paved the way for what we now call quantum technologies," and they began as large tabletop devices. Eventually scientists figured out how to make them small enough to fit into commercial systems. Anderson foresees a similar trajectory for atomic radio. Within the next couple of years, he is confident they will have a suitcase-sized system that would fit neatly into an airplane or a ship, for example—vessels that would welcome the added protection from interference and electromagnetic pulses conferred by these detector cells. And perhaps one day these vapor cells will replace those pesky car antennae with something a bit more aesthetically pleasing. [h/t: Technology Review]

1 0

Fwd: Fwd: [socal-hamnet-users] Mesh Network cameras and brushfires
by Bill Talanian 18 Sep '18

18 Sep '18

-------- Forwarded Message -------- Subject: [socal-hamnet-users] Mesh Network cameras and brushfires Date: Tue, 18 Sep 2018 15:58:12 -0700 From: Orv W6BI <orv.beach(a)gmail.com> Reply-To: socal-hamnet-users(a)groups.io To: VC_HAMMESHNET <VCHAMMESH(a)groups.io>, socal-hamnet-users(a)groups.io Earlier this afternoon we had a brushfire in the northeastern corner of Simi Valley. VCFD jumped on it with lots of resources and got it snuffed out before it got much beyond about 50 acres. In spite of it being windy and jiggling the camera, and having to zoom way in, I got some fairly decent screenshots from the mesh network camera on the north end of Sycamore Road here in Simi Valley. A few of them are attached. I streamed it for about 30 minutes to Youtube, too. 73 Orv W6BI -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#89):https://groups.io/g/socal-hamnet-users/message/89 Mute This Topic:https://groups.io/mt/25750937/548622 Group Owner:socal-hamnet-users+owner@groups.io Unsubscribe:https://groups.io/g/socal-hamnet-users/leave/2938607/2014994440/xyzzy [pgstrauss(a)verizon.net] -=-=-=-=-=-=-=-=-=-=-=-

1 0

Military Tooth Mics For Invisible Radio Calls
by Brian Milburn - K6BPM 10 Sep '18

10 Sep '18

We need these! https://www.defenseone.com/technology/2018/09/military-now-has-tooth-mics-i… -- Brian - K6BPM

4 3

Jump to page:

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

SBARC-list