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KI6ZHD USA flag USA

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I received my technican license in May, 2009, ceneral license in August, 2009, and extra in June 2012.  That whole time, my focus has been around digital modes on Linux but the next challenge will be to start learning CW (we'll see how that goes).

Recent interests:

- I run my entire HAM shack on Centos 6 Linux supporting digital modes, Echolink packet radio, SSTV (digital and analog), APRS, etc.  I've fully documented that journey in my Centos HamPacket documentation at http://www.trinityos.com/HAM/CentosDigitalModes/hampacketizing-centos.html

- I am the Yaesu System Fusion repeater trustee for the BayNet YSF repeater (444.425 in the Bay Area : Palo Alto, CA) running a fulling WiresX enabled system.  I have given several presentations about YSF to our annual BayCON event where I both try to inform what's new but also how the rest of the digital voice world is evolving too (DMR, Dstar, etc). : http://www.trinityos.com/HAM/index-ham.html

- I'm actively involved in the support side for the Direwolf software-based AX.25 TNC for Linux, Mac, and Windows - http://home.comcast.net/~wb2osz/.  This pacage is more than a TNC as it natively supports APRS, ttAPRS (touch tone support), with connectors for AGW/PE, TCP-KISS, and Serial emulation.  In addition to supporting AFSK300 (HF), AFSK1200, and FSK9600, it supports several PSK modes for more reliable operation at higher speeds.

- I am the Linpac for Linux packet radio maintainer found at https://sourceforge.net/projects/linpac/ .  This is an easy to use NCURSES terminal supporting multiple concurrent packet connections, mailboxes, message relay, and UNPROTO support.

- I've been developing a documentation set for running AX.25 packet radio on a hardened Raspberry Pi image.  You can find more about that here - http://www.trinityos.com/HAM/CentosDigitalModes/RPi/rpi2-setup.html

- I presented "Linux and Amateur Radio - Opening Doors without Windows" at the Pacificon 2013 convention at the Santa Clara Convention center - This presentation includes lots of screen captures, videos, etc. of applications available on Linux today for various HAM radio interests - http://www.trinityos.com/HAM/index-ham.html#Linux-and-Amateur-Radio

 

The Shack gear:

Base Station HF & VHF/UHF:

HF: The home setup consists of a Yaesu FT-950 into an Ameritron AL80B 1kw amp into a Palstar AT2K tuner into an Alpha Delta DX-CC parallel dipole up 60'. http://www.trinityos.com/HAM/Antennas/Alpha-Delta-DX-CC/alpha-delta-dx-cc-overview.html.

VHF+: On the VHF/UHF side, I have a Kenwood TM-D710 that has two 24/7 uses. VFO-A runs on 145.050 running Linpac as KI6ZHD / KI6ZHD-1 for 1200baud packet ops. VFO-B is running Svxlink / Echolink as a simplex node on 145.595 pl 136.5. I also have a Yaesu FT-857 for the occasional portable ops as well as use se on the Mad Scientists 2m N6MPX SSTV nets. The home VHF/UHF rigs go into a Comet CX-333 tribander antenna.http://www.trinityos.com/HAM/Antennas/Comet-CX-333-and-G5RVjr/

 

Above in the upper left is a current picture of my shack.  Click on it to see a larger view.  Below is an older picture of my shack with the older crappy MFJ-969 tuner:

 

Mobile:

I have a fairly elaborate Kenwood TM-D710 installation in my car to both be a removable "Go-Kit" and to also avoid tearing up the car when I was installing the radio. It's connected to a Comet SB224 triband antenna. Check out http://www.trinityos.com/HAM/G35-mobile-D710/index-g35-mobile-d710.html for the details and you can find me on APRS as KI6ZHD-9 - http://aprs.fi/?call=KI6ZHD-9&z=13&timerange=10800&others=1

 

Portable & HT:

KG6GAO recently gave me a pair of Alinco DJ530s which are the older "square" type HTs which are pretty big but these HTs support cross-band repeat! I've never seen HTs that can do that! I also recently did some remote ops in Lake Shasta, CA with the FT857 while camping. That was fun and I hope to do more of that in the future. I also have a Kenwood TH-F6A (fantastic little HT), a Yaesu VX5, and an Icom IC80AD (Dstar).

 

Packet and Digital modes:

I've also played around with all sorts of hardware TNCs be it AEA PK232s, Kantronics KPC3s, Timewave PK96s, Kenwood D710s, PacCOMM Tiny2, and even the TNC-Pi (TNC-X for the Raspberry Pi - shown below).  All are very nice but Direwolf running on Linux blows them all away in terms of weak signal decodes, etc.  On the HF digital modes, it's Fldigi and sometimes 300BAUD Direwolf on HF. 

 

 

Why all the Digital modes?

In many respects, packet BBS stuff is a dial-up BBS blast from the past which I have many fond memories. Once upon a time, I used to run an Carina BBS running on an Atari 130XE computer, then a PC/Telegard BBS running on an Amiga BridgeBoard, and then Telegard BBS running on networked 386/486s running DOS and Netware Lite with 10Base2 thinnet Ethernet! Once Linux came into my life in 1991 on a 486DX, I never looked back!

 

Profession:

As a little background on me, I work at Juniper Networks running various continuous delivery engineering efforts supporting the MX, PTX, other Juniper platforms. Previously, I worked on the Branch SRX line doing technical marketing and keeping the marketing people honest. Prior to that, I worked at Zvents running all of Operations as well as had another stint at Juniper Networks running the SRX development labs and in the Proof of Concept labs (POC) for 6.5yrs before that.

 

Find me on RF and the Net:

You can always bring up my Svxlink / Echolink node - KI6ZHD-L:767882 - http://www.echolink.org/links.jsp?lat_deg=&lat_min=&lat_NS=North&lon_deg=&lon_min=&lon_EW=West&sel=gridsq&gs=cm97ai&city=&state=&country=US&d=2. Once you connect, wait at least a minute or two as I'll get an SMS text that you've connected and I'll turn on the HT to see if you're still there.

I've been spending most of my recent time on the VHF/UHF voice bands during the commute hours on the Bay-Net repeaters (KJ6VU: 145.390-pl88.5 or 433.975+pl100.0)., N6NFI (145.230-pl100) and I also monitor K6LRG (147.045+pl94.8) and WA6GFY (443.775+pl100.0). Digital wise, you can find me on 1200 packet on 145.050 via the LPRC3 node up on the Loma Prieta mountain top. 

73!

--David

KI6ZHD

7944285 Last modified: 2017-03-04 22:37:07, 8204 bytes

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