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"https://0x9900.com/http-status-codes/", "published_at": "2012-11-28T18:49:22+00:00" }, { "id": "01a0871c-f034-7262-8247-7578ac988878", "title": "Spam filtering with OpenBSD and making spamming a little harder", "url": "https://0x9900.com/spam-filtering-with-openbsd-and-making-spamming-a-little-harder/", "published_at": "2012-11-26T04:49:22+00:00" }, { "id": "01a0871c-f034-7262-8247-7578acafee10", "title": "Bash Tip - Beware of spaces", "url": "https://0x9900.com/bash-tip-beware-of-spaces/", "published_at": "2012-10-22T05:08:02+00:00" }, { "id": "01a0871c-f034-7262-8247-7578ad96a6b5", "title": "Bash Tip - The importance of testing that variables are defined.", "url": "https://0x9900.com/bash-tip-the-importance-of-testing-that-variables-are-defined/", "published_at": "2012-10-17T06:23:48+00:00" }, { "id": "01a0871c-f034-7262-8247-7578ae2fd0dc", "title": "Using OpenBSD to build a secure access point", "url": "https://0x9900.com/using-openbsd-to-build-a-secure-access-point/", "published_at": "2012-09-25T05:23:10+00:00" }, { "id": "01a0871c-f034-7262-8247-7578aeaaf090", "title": "Build you own stratum-1 NTP server for less than $100", "url": "https://0x9900.com/build-you-own-stratum-1-ntp-server-for-less-than-100/", "published_at": "2012-08-27T05:23:10+00:00" }, { "id": "01a0871c-f034-7262-8247-7578af0734e0", "title": "How SSD works", "url": "https://0x9900.com/how-ssd-works/", "published_at": "2012-03-31T19:13:10+00:00" }, { "id": "01a0871c-f034-7262-8247-7578afebfb65", "title": "Arduino Temperature and Humidity sensor", "url": "https://0x9900.com/arduino-temperature-and-humidity-sensor/", "published_at": "2012-02-22T05:23:11+00:00" }, { "id": "01a0871c-f034-7262-8247-7578b05b5302", "title": "Using SSH with an SSH bastion", "url": "https://0x9900.com/using-ssh-with-an-ssh-bastion/", "published_at": "2012-01-18T20:23:11+00:00" } ] posts Claim your blog

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2026

QRA Locator Tool Now Available original ↗

12 Jul 2026

Choke Baluns for F6KOP original ↗

21 Jun 2026

All together for our passion original ↗

23 Jan 2026

2025

Is Your Antenna Actually Getting Out?original ↗

31 Dec 2025

From simple VHF/UHF Antennas to DX Champions original ↗

8 Apr 2025

Connecting Across California and Beyond original ↗

2 Apr 2025

A Look at HF Digital Modes in Ham Radio original ↗

2 Feb 2025

2024

Link pi-star to reflectors using systemd original ↗

22 Dec 2024

Alternatives to HWEF Antenna original ↗

12 Dec 2024

HWEF Antenna: Pros & Cons and Why I'm Not a Fan original ↗

28 Nov 2024

Cable comparison tool original ↗

23 Jul 2024

Coax Cable Loss and the Impact of Bad SWR original ↗

3 Jul 2024

Measure Resonance using a NanoVNA original ↗

12 Jun 2024

Grid Dip Meter original ↗

6 Jun 2024

Essential Space Weather Graphs original ↗

27 May 2024

Building a Delta Loop Antenna (part 2)original ↗

13 Feb 2024

Building a Delta Loop Antenna original ↗

1 Feb 2024

2023

Debunking the Simplified Notion About Electrocution original ↗

13 Dec 2023

Adding the 17-Meter Band To My Hustler 4BTV original ↗

30 Sept 2023

San Mateo Radio Club Scavenger Hunt original ↗

24 Sept 2023

Ground-plane antenna original ↗

8 Jun 2023

Tips For Mastering Repeaters original ↗

22 May 2023

The HF Bands original ↗

20 May 2023

100 Countries in 2 weeks with 10 Watt original ↗

23 Mar 2023

Tracking Weather Balloons original ↗

4 Jan 2023

2022

Common Mode Current Choke original ↗

17 Dec 2022

Hustler 4BTV Cleanup & Tuning original ↗

30 Nov 2022

Telegram Propagation Bot original ↗

18 Jun 2022

Moxon antenna calculator original ↗

8 May 2022

Building a Double Bazooka Antenna original ↗

18 Apr 2022

Building a Dummy Load original ↗

4 Apr 2022

Measure a capacitor using an oscilloscope original ↗

24 Mar 2022

Measure an inductance or capacitance using an oscilloscope original ↗

19 Mar 2022

How to power your radio original ↗

6 Feb 2022

Antenna modeling software original ↗

31 Jan 2022

2021

Mini APRS Weather Station original ↗

13 Oct 2021

Digital Voice Presentation original ↗

9 Oct 2021

Water Recirculation Pump Switch original ↗

6 Oct 2021

Learning CW original ↗

23 Jul 2021

Field Day 2021 original ↗

2 Jul 2021

80/75/40-meter antenna for Field Day original ↗

8 Jun 2021

Reflected Power and VSWR original ↗

25 Apr 2021

Random-Wire Antenna original ↗

31 Jan 2021

Using DUDE-Star for digital contacts original ↗

30 Jan 2021

NAVTEX for Emergency Communication original ↗

26 Jan 2021

Followup on: where are all the hams?original ↗

19 Jan 2021

2020

Programming the radio module SA818 original ↗

29 Dec 2020

Connecting your TYT on a Raspberry-Pi original ↗

26 Dec 2020

HF Antennas original ↗

10 Nov 2020

Remote Controlled Antenna Switch original ↗

7 Nov 2020

Bias Tee original ↗

4 Nov 2020

ESP8266 Environment Sensor original ↗

2 Oct 2020

Garden Lights original ↗

16 Jun 2020

Where are all the hams?original ↗

7 May 2020

Baking bread original ↗

2 May 2020

80-meter NVIS antenna original ↗

27 Apr 2020

I just got my Tech License original ↗

17 Apr 2020

Ham Radio Jargon for beginner original ↗

9 Apr 2020

DMR D-Star cross-mode original ↗

6 Apr 2020

DMR+ with Pi-Star original ↗

20 Mar 2020

Canadian Ice Road original ↗

1 Mar 2020

APRS Telemetry original ↗

28 Feb 2020

Common mode current and chokes original ↗

23 Feb 2020

Measuring Toroid Attenuation original ↗

31 Jan 2020

2019

D-Star with an Icom ID-4100 original ↗

30 Dec 2019

Battery board with protection cut-off original ↗

16 Sept 2019

Logging on MacLoggerDX with Fldigi original ↗

11 Aug 2019

YSF to DMR Cross mode on Pi-Star original ↗

7 Aug 2019

Field Day 2019 original ↗

5 Aug 2019

Keeping your AllStar node cool original ↗

29 Jul 2019

Going digital with the FT-70D original ↗

17 Jul 2019

Battery Monitor for QRP operations original ↗

14 Jul 2019

Clamp-on RF current probe original ↗

12 Jul 2019

Mobile Allstar node original ↗

11 Jul 2019

DMR or C4FM Simplex Frequencies.original ↗

18 May 2019

Parachute Mobile for AllStar users.original ↗

12 Apr 2019

APRS iGate for Parachute Mobile original ↗

7 Apr 2019

2015

How to debug with logging original ↗

26 Sept 2015

Santa Barbara Wet Wednesdays original ↗

10 Sept 2015

How to choose a good password?original ↗

27 Aug 2015

GIT 101 - the beginners guide original ↗

25 Aug 2015

Create self contained python executables original ↗

22 Aug 2015

Unix Archive Tools original ↗

13 Aug 2015

2014

Concatenation of strings in Python original ↗

24 Aug 2014

This Engine Pulls!original ↗

28 Jul 2014

2013

Python descriptors original ↗

2 Sept 2013

Two Factor Authentication with SSH & S/Key on OpenBSD original ↗

29 Aug 2013

Managing records in python original ↗

15 Mar 2013

Optimizing your code with __slots__original ↗

22 Feb 2013

Using free public DNS servers original ↗

6 Jan 2013

2012

Embedding OpenBSD original ↗

6 Dec 2012

HTTP Status codes original ↗

28 Nov 2012

Spam filtering with OpenBSD and making spamming a little harder original ↗

26 Nov 2012

Bash Tip - Beware of spaces original ↗

22 Oct 2012

Bash Tip - The importance of testing that variables are defined.original ↗

17 Oct 2012

Using OpenBSD to build a secure access point original ↗

25 Sept 2012

Build you own stratum-1 NTP server for less than $100 original ↗

27 Aug 2012

How SSD works original ↗

31 Mar 2012

Arduino Temperature and Humidity sensor original ↗

22 Feb 2012

Using SSH with an SSH bastion original ↗

18 Jan 2012