EBARC on Twitter

ORCA: Oakland Radio Communications Association

MARS: Marin Amateur Radio Society

CCCC: Contra Costa Communications Club

CCRA: Contra Costa Repeater Association

Contra Costa RACES

NorCal VHF/UHF Contest Page

NALCO Northern Alameda County Amateur Radio Emergency Services

KY6R, Rich Holoch's Presentations on DXing (NOTE: some of these are large PDF files that will take awhile to download/open):

  • Low Band DX Antennas From Rich's February 2017 presentation. Some timely strategies for working the low bands during the solar minimum with mostly home-made wire antennas that don't require a massive amount of real estate.

  • DXCC HONOR ROLL IN ONE SOLAR CYCLE It's more about the journey and education along the way than it is about the final achievement. An informative and humorous look at reaching DXCC Honor Roll with a "little pistol" station.

  • WIRE ARRAYS FOR DXING was the topic of Rich's, presentation in January 2011. A ton of great information and inspiration for anyone who likes to build their own wire antennas.

  • DXCC HONOR ROLL ANTENNA STRATEGIES As the title suggests, this presentation is about optimizing your antennas for working DX with a little about propagation and operating skills too.

  • HOW TO USE AN ANTENNA ANALYZER Tips on using an analyzer to fine tune your antennas.

  • DXCC - THE FINAL MILE Or How HFTA (High Frequency Terrain Analysis) Saved My Sanity.

  • DXCC Honor Roll #1 Antenna Strategies for reaching the most difficult goal in DXing, a presentation for Pacificon 2014.

  • U-Rat Project Building a Universal Remote Antenna Tuner.

Antenna Modeling Workshop with 4Nec2:
PDF copy of the October 2017 presentation
YouTube 4Nec2 Tutorials by DX2Hunt
PDF 4nec2 Tutorial by Gunthard Kraus

Keith Payea's, AG6CI, excellent presentation on radio astronomy (May 2017) is available here. And more information on the HAMSci project to crowd-source data collection during the August 21, 2017 solar eclipse and be found here. There is also an informative article in the February 2017 issue of QST.

THE HENRY-1 HIGH ALTITUDE BALLOON LAUNCH went off without a hitch (well, very few anyway) on Saturday, March 18th 2017. We felt it was deserving of a webpage, with an hour-by-hour narrative, photos, videos, and links to lots of sites with information about high altitude ballooning. Read more...

Vis-a-vis Martin Rothfield's August 2016 program on Digital Voice, here is a link to the free software that he demonstrated: WWW.freeDV.org

Vis-a-vis Jim Colletto's July 2016 program on the Heard Island DXpedition, here are some links to more spectacular photos: Jim's Facebook Page and VK0EK's photo page

Summits On The Air (SOTA) - a presentation at the July 2015 meeting by Clayton Nalls, NF1R.

Improve your contesting skills (great for Field day) with AE0EE, Bill Mitchell's Tips on Contesting

Mesh Network Information from Broadband-Hamnet.ORG

Resonant Feedline Dipole: The April 2014 presentation by Bill Mitchell, AG6RB, and Jack Burris, K6JEB, on building a resonant feedline dipole for the UC Berkeley ARC, W6BB, using EBARC's new antenna analyzer.

Some notes and links from the February 2014 presentation on Software Defined Radios by Simon Poulton, KK6IJZ:

If you want a general intro to some interesting features and benefits of SDR, watch this: www.youtube.com/watch?v=ZuRcaxpbYCw. That is the video that got me to invest in the dongle, and as I'd already heard of Linrad, I waded in from there. Linrad is written and maintained by Leif SM5BSZ and downloadable here: www.sm5bsz.com/linuxdsp/linrad.htm. You'll note that there is a version that can be compiled and run under Windoze, although as I said, I think using a proprietary system is antithetical to the principles, heritage and achievements of radio amateurs.It is very important to read the Linrad install instructions *before* attempting - for all its wonderful features and benefits, Linrad is NOT a conventional in the way of most modern desktop-run applications and you can quickly run into a problem that might otherwise "discourage persistence"! I also recommend reading this before using too: www.on4khg.be/SDR.html#Linrad%20parameters.

Regarding demos, let's start with something simple - this is a decent result with more conventional hardware producing a linear input to a sound card which Linrad then processes: www.youtube.com/watch?v=edErVFLuipA. Here is the kind of demo I was hoping to show at the meeting for dongle with converter: www.youtube.com/watch?v=KaFdsM24lps. It's not immediately apparent what he's doing, but look for the cross/circle cursor's movement and how he's manipulating some of Linrad's controls, particularly on the bandwidth filter at the bottom. There are two bandwidth filter curves there, and you'll see not only how they're controlled, but the steepness of their shoulders.

Regarding performance, this is a demo of Leif's version of the Osmocom drivers that are used for a dongle's control: www.youtube.com/watch?v=3elerqjx_w8. Leif is long-winded as usual, but around minute 11, he gets to the point which is that using his improved re-write of the Osmocom drivers together with Linrad, he's able to pull a weak signal out from below noise that is otherwise saturating the dongle's input. Or as he, like a typical European, understates it: "The different gain modes in Linrad have advantages". As far as I'm aware, no other SDR software can perform like this. Similarly, here is a page regarding Linrad's AGC performance: www.sm5bsz.com/lir/agctest/agctest.htm.

As mentioned, most phones and wireless computer connectivity devices are SDR, and from what I understand, Osmocom is pretty much the standard software library the hardware industry uses and supports for these kinds of devices.

Propagation Prediction Tools from the January 2014 presentation by Peter Hoffman, W6DEI
VOACAP Point-to-Point
VOACAP Coverage Map
PSK Reporter
Reverse Beacon Network
HFRADIO.ORG Solar and Ionospheric Data
HamCap, DxAtlas, Ionoprobe Software

Maritime Mobile Nets Audio clips from HF SSB contacts by Peter, W6DEI, with sailors of the Bluewater Cruising Association of British Columbia, Canada.

Ron Smith, KE6RS, and Paul Maciel, AK1P, gave the February 2013 presentation on QRP. As promised, here are some useful links covering some of the many interesting aspects of "low power" ham radio.

QRP Clubs:

GQRP Club (England)
Benelux QRP Club - Note: In Dutch
EA QRP Club (Spain) - Note: In Spanish
VK QRP Club / CW Operators QRP Club (Australia)
Alaska QRP Club
American QRP Club
Eastern Pennsylvania QRP Club
Flying Pigs QRP Club, International
Four States QRP Club Sells Kits
Hawaii QRP Club
Knightlites QRP Association
Long Island QRP Club
Michigan QRP Club
New England QRP Clup Sells Kits
New Jersey QRP Club
North Georgia QRP Club
NorCal QRP Club Not selling kits,
has online manuals for retired kits

NorTex QRP Club - Sells Kits
QRP Amateur Radio Club International Very active,
nice quarterly magazine
QRP Australia
Saint Louis QRP Society
Reno QRP Group

Commercial Kit Vendors:

American Morse Equipment
Hendricks QRP Kits
Kanga US
Oak Hills Research
Small Wonder Labs

KJ6DZB, Mathison Ott's program on Software Defined Radio presented at the February 2012 meeting (in PDF format).

Jack's Field Day 2011 program presented at the June 2011 meeting (in PDF format).

Here are some links on Hackerspace as presented by Jason Spence, KF6RGF, at the April 2011 meeting:
Ace Monster Toys is a hackerspace in the SF Bay Area in Oakland. Our space is generally open to members and their guests, and not the general public. If you would just like to see the space or exchange greetings from another hacker space, people on our Weekly Schedule can show you around with some advance notice.
Noisebridge - Noisebridge is an infrastructure provider for technical-creative projects, collaboratively run by its members. We are incorporated as a non-profit educational corporation for public benefit. We operate primarily in a 5,600 square-foot space located in the heart of San Francisco. We teach, we learn, we share. Read more about Noisebridge or watch a short video.
- Maker Faire 2011 is coming up: May 21st and 22nd. Maker Faire isn't easy to describe, but we think these videos do a pretty good job of showing what a wonderful and unique festival it is! Started in San Mateo, California in 2006, and also being held in Detroit and New York, Maker Faire is the premier event for grassroots American innovation. As the World's Largest DIY Festival, this two-day family friendly Faire has something for everyone - a showcase of invention, creativity and resourcefulness and a celebration of the Maker mindset.

Chris Tate, N6WM, did an enthusiastic presentation on contesting at the March 2011 meeting. If you want more information about the the logging software he recommended or the super contest station he built here are the links: N1MM logging software and K6LRG super contest station.

Surface Mount Technology Jack Burris, K6JEB and Ron Smith, KE6RS, gave a presentation on building circuits with surface mount technology at the February 2010 EBARC meeting.

Maritime Radio Historical Society Denise Stoops, May 2007 presentor, suggests that members of EBARC may want to have a look at the Maritime Radio Historical Society's web page and bring any questions they may have to the meeting for Denise to answer.

DX Atlas by Alex, VE3NEA, has downloadable propagation programs: DX Atlas, IonoProbe, HamCap, and Faros as presented by Ron Smith and Jack Burris at the April 2007 meeting.

VOACAP Also presented at the April 2007 meeting, you can download the VOACAP propagation program itshfbc.exe at this site.

Walter Pyle's website: Walter Pyle, WA6DUR, presented a program on solar energy at the October 2006 meeting. His company, H-Ion Solar Inc., offers clean and renewable energy solutions using solar and hydrogen technologies.

Emily Clarke's website: At the September 2006 general meeting, Emily Clarke, N1DID, gave a presentation on amateur radio aboard satellites. Emily is on the board of AMSAT and one of the most knowledgeable people in this fascinating niche of amateur radio. Lots of information on her website and links to other sites with AMSAT info.

Grant Connell's website: At the May 2006 general meeting Grant Connell, WD6CNF, gave a presentation about some of the ham radio software he has developed. Among his suite of applications are programs to decode CW, add DSP filtering to the audio output of your radio, an audio spectrum analyzer, and many other interesting programs.

Alan Biocca's website: At our March 2006 general meeting, Alan Biocca, WB6ZQZ, and Eric Williams, WD6CMU, gave a presentation on their homemade antenna launchers.

ARRL: The voice of amateur radio in the U.S.

The QRZ Callbook: Perhaps the most comprehensive directory of domestic and DX call signs.

DXer's Handbook: An excellent introduction to the "art" of DXing by Bryce Anderson, K7UA.

DX Reflector: See what DX is on the bands RIGHT NOW.

EHam Net: Discussion groups on many ham-related topics, product reviews, and an excellent classified section for finding used ham equipment.

Cebik's Antenna Site: Antenna theory and projects by L.B. Cebik, W4RNL, one of the most respected experts in the field and a frequent contributor to QST magazine.

AC6V Ham Radio Links: Over 6000 links to other sites with ham radio information on every conceivable topic.

Online Practice Exams: Practice taking the written exam elements for Technician, General, or Extra licenses. Randomly generated tests from the current question pools allow you to practice taking the test and grade yourself.

Azimuthal Map: Create an azimuthal world map centered on your QTH, courtesy of Tom, NS6T.

CW Trainer: CW training software programs from Ray Goff, G4FON. This free, downloadable software will help you get up to speed for passing the 5wpm test or boost your skills to a more practical level like 20 or 30+wpm. It is designed to use the Koch Method that has proved so successful in teaching new cw operators. It emphasizes starting with just a few characters at a time, but at full speed, then gradually increasing the number of characters (rather than learning all the characters first and then trying to increase your speed).

VOACAP Excellent and easy to use online propagation prediction tool.

What is Ham Radio: A good site for people who want to know what ham radio is all about and/or how to become a ham.

A Chronologic History of Amateur Radio