MicroHAMS February 16, 2016

Participants

Mark

Amy

Dean

Scott H

Mike

Rick

Kenny

Peter

Javier

Phil

Dennis

Dave W.

Jeffrey

Don

Michael

Tim

Events

Ham fairs list by Lynn N7CFO:

http://www.n7cfo.com/amradio/hf/hf.htm

March 5th – Mike and Key Hamfest Saturday in Puyallup, WA

March 19th – MicroHAMS Digital Conference

Additional fun item at MHDC:

The Icom IC-7300 “SDR” might make an appearance. Prototype was shown at Orlando.

Speakers

Peter K4PNG

Report of First SDR-SIG Meeting

21 people attended

HDSDR presentation

SDR dongle

SDR Console demo

Next meeting, Tuesday, March 29th, 6pm at Building 27

Kenny KU7M

Buster AMBESERVER

History

Robin AA4RC built D-Plus and a backdoor

DV-Dongle / DVAP

G4KLX built DSTARRepeater and ircDDBGateway

It lets you access D-STAR reflectors

NWDigital

AMBE CODEC for digital voice

UDRX-440 needs AMBE

ThumbDV

PiDV

Buster is a Mac application by:

NH6Z, Jeremy McDermond

From <http://www.nh6z.net/Amatuer_Radio_Station_NH6Z/About_Me.html>

Remote access to the AMBE service was desired and the AMBE server was born.

G4KLX and K7VE

Buster + Raspberry Pi + AMBE 30000R by NWDigital

Buster is Open Source.

Kenny did a super cool demo on a Mac.

FYI about D-STAR reflectors

  • Reflector 1C is general first contacts
  • Reflector 35C is Seattle area
  • Dstarinfo.com tells what intended uses of reflectors are.

MicroHAMS Digital Conference – Update 2

The final speaker for the conference has been posted, Phil Horkin-AF7GY will be speaking about using line of sight (LOS) for MIMO applications. Here is a quicks summary of his talk:

As a brief explanation of the topic, Line of Sight (LOS) MIMO is rather new technology that uses multiple antennas on both the transmitter and receiver, much like conventional (Non-Line of Sight MIMO), but operates in the absence of multipath. Because of this distinction, there are constraints on how this technology may be used, requiring careful placement of both transmitting and receiving antennas, but where it is applicable, may be used to double or triple the link throughput without a linear increase in aggregate transmit power.

LOS MIMO has its greatest applicability to high data rate systems, either for fixed wireless, or with one node moving. While this will have somewhat limited applicability to amateur radio, our thought has been that this is an example of a digital system employing SDR and radio communications technology that many amateurs may find interesting.

73, Kenny-KU7M

MicroHAMS January 19, 2016

Participants

Peter, K4PNG

Mike, K5TRI

Jim, KE7JIM

Andreas, KU7T

Don H., KC7YZW

Tim, KK7TM

Phil,

Eric

Scott H.

David

Javier

Mike

John W7FU

Dennis

Miguel

Will

Wayne

Mike

News

MicroHAMS Digital Conference coming in March 2016

Technician and General License Courses – Redmond CERT – contact Javier

Extra Class – contact Dave Wickert

SDR SIG – Tuesday, Building 27 “Garage”

Agenda

Mike Mraz, N6MZ

 Mike_N6MZ

DXpedition to Navassa Island 2015 K1N

This island was off the air for a generation. #1 most wanted country.

Mike showed us a great video of the two-week expedition.

There is a DVD available from the K1N website.

How can you get started? Gain experience on an easy DXpedition first, such as the Virgin Islands, during a holiday. You need lots of time off work, DX experience, CW experience, disposable income (around $10,000+), and you need to get on a team somehow.

MicroHAMS November 17, 2015

Participants

Phil, N2EU

Scott S., KD7VBS

Bill, WA7NWP

Don Marshall, KE7ARH

Dave W. AE7TD

John Petrich, W7FU

Peter, K4PNG

Terence Chan KE7SFF

Tim, KK7TM

Events

Puyallup in March 2016

December MicroHAMS meeting will be dinner only with some door prizes for participants!

New SDR Group – John Petrich, W7FU

John is making a special interest group (SIG) about Software Defined Radio(SDR).

Please stay tuned for another message to MicroHAMS real soon that talks about this.

We’ll meet three times a year.

Let’s compile a list of names of MicroHAMS who would be interested.

He’s open to ideas about the location to meet.

The first group meeting will be after the holidays.

Low end SDRs (in terms of price) have been of the most interest, generally.

SDR Links and Ideas from Scott Slack, KD7VBS

SDRPlay

http://sdrplay.com

$149

SDRPlay RSP

http://hackaday.com/2015/09/25/mid-price-hardware-gets-serious-about-software-defined-radio/

Software

HD SDR

SDR-Console

SDR# (SDR sharp)

RTL SDRs

RTL-SDR 2 has better frequency stability and can be modified for lower bands.

Amazon.com

Hobbyist’s guide to the RTL-SDR by Carl Laufer

$20

MHDC SDR Idea

We could have an early start session at MicroHAMS Digital Conference 2016 about getting started with SDR, say, 8:00 AM.

MicroHAMS October 20, 2015

MicroHAMS October 20, 2015

Participants

Phil N2EU

Dennis *new*

Peter K4PNG

Steven *new*

Scott S. KD7VBS

Kenny KU7M

Andrew *new*

Wayne K7ETW

Dean *new*

Amy *new*

Marc *new*

Michael AJ6E

Bart AE7SJ

Scott H. N7SS

Bill WA7NWP

David W7CF

Tim KK7TM

News

Scott Slack KD7VBS is on the cover of QST!

PNW VHF meeting was last week and KD7VBS_is_FamousBill won an IC-7100!

MDSR – http://users.skynet.be/myspace/mdsr/

Hamfest near Corvallis, Oregon this weekend

Friday / Saturday Linux club – ask Scott Slack for details

Speaker

Bart Kus – HAMWAN

HamWAN_logoMicroHAMS made a generous donation to HAMWAN.

http://www.hamwan.org/t/Wiki+Home+Page

HAMWAN worked for ARRL Field Day by providing internet connectivity. There was interest expressed by Mercer Island and Redmond City. If you know any contacts for either EMCOM org. please let Bart know via Tim (kk7tm@kk7tm.com) to follow up.

  • 900MHz band is declared dead because of tons of noise.
  • 1.2GHz band is being looked at for higher power.
  • 5GHz band is in use currently.

MicroHAMS September 15, 2015

Participants

Javier

Phil

Dave J

Bill Vodall WA7NWP

Scott S

Tim

Wayne

Don

Art

Peter

David

Cameron KG5GHQ

 

Events

Seattle Maker Fair this weekend

SEP 26 Spokane Hamfest Washington state convention

SEP 26 Scouting Radio and Electronics Merit Badge and Tech License – contact Tim KK7TM@KK7TM.com

 

 

Agenda

Bill Vodall — WSPR and his Raspberry Pi-based beacon!

Weak Signal Propagation Reporter (WSPR)

https://en.wikipedia.org/wiki/WSPR_(amateur_radio_software)

Bill’s website:  http://wa7nwp.blogspot.com/

K1JT Author’s website: http://physics.princeton.edu/pulsar/K1JT/wspr.html

WSPR Network:  http://wsprnet.org/drupal/

RADWAV SKyPi-40 XCVR Bundle:  http://radwav.com/special.html

 

Amateur Logic episode discussing the Raspberry Pi WSPR shield

RTL-SDR

New and improved RTL-SDR available on Amazon for $20  http://amzn.to/1SLPS6F

http://www.rtl-sdr.com/

New book: Hobbyist’s guide to the RTL-SDR by Carl Laufer  http://www.amazon.com/gp/product/B00KCDF1QI/ref=as_li_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B00KCDF1QI&linkCode=as2&tag=book0674-20&linkId=XHRIQAZC3JVLUJWM

 

KIO hex beam antenna:  http://www.k4kio.com/