https://0x9900.com/static/VSWR.html 2026-07-12T21:04:34+00:00 weekly 0.5 https://0x9900.com/static/FieldDayGraphs-2024.html 2026-07-12T21:04:34+00:00 weekly 0.5 https://0x9900.com/ 2026-07-11T17:18:00+00:00 weekly 0.5 https://0x9900.com/qra-locator-tool-now-available 2026-07-11T17:18:00+00:00 weekly 0.5 https://0x9900.com/images/qra/Earth-180.jpeg Earth https://0x9900.com/choke-baluns-for-f6kop 2026-06-21T07:23:00+00:00 weekly 0.5 https://0x9900.com/images/kop-choke/20260620_065934-520.webp Choke installed on the antenna https://0x9900.com/images/kop-choke/411954_1_105_c-320.webp Large ferrite core https://0x9900.com/images/kop-choke/Choke-1-720.png Choke balun #1 https://0x9900.com/images/kop-choke/2251CC_1_105_c-720.webp Choke balun #1 https://0x9900.com/images/kop-choke/Choke-2-720.png Choke balun #2 https://0x9900.com/images/kop-choke/A33F57_1_105_c-720.webp Choke balun #2 https://0x9900.com/all-together-for-our-passion 2026-01-23T11:02:00+00:00 monthly 0.5 https://0x9900.com/is-your-antenna-actually-getting-out 2025-12-30T18:07:00+00:00 monthly 0.5 https://0x9900.com/images/WSPR/WSPR_transmission-340.png WSPR transmits acros the world https://0x9900.com/images/WSPR/Pattern-640.webp Antenna Tansmission Pattern https://0x9900.com/images/WSPR/Azimuth-640.webp Antenna Azimuth Pattern https://0x9900.com/images/WSPR/Angle-640.webp Signal Takeoff Angle https://0x9900.com/from-simple-vhfuhf-antennas-to-dx-champions 2025-04-08T09:07:00+00:00 yearly 0.5 https://0x9900.com/images/VHF-UHF-Antennas/GPAntenna-180.jpg Ground Plane Antenna https://0x9900.com/images/VHF-UHF-Antennas/JPole-180.jpg JPole Antenna https://0x9900.com/images/VHF-UHF-Antennas/yagi405-180.jpg Yagi Uda Antenna https://0x9900.com/images/VHF-UHF-Antennas/diamond-x50-180.jpg Coaxial Collinear Antenna https://0x9900.com/images/VHF-UHF-Antennas/helix-180.jpg Helical Antenna https://0x9900.com/images/VHF-UHF-Antennas/eme-antenna-180.jpg Helical Antenna https://0x9900.com/images/VHF-UHF-Antennas/NanoVNA-280.jpg NanoVNA https://0x9900.com/images/VHF-UHF-Antennas/Zoom-AA55-180.jpg Antenna Analyzer https://0x9900.com/connecting-across-california-and-beyond 2025-04-02T10:22:00+00:00 yearly 0.5 https://0x9900.com/a-look-at-hf-digital-modes-in-ham-radio 2025-02-02T08:54:00+00:00 yearly 0.5 https://0x9900.com/link-pi-star-to-reflectors-using-systemd 2024-12-22T14:31:00+00:00 yearly 0.5 https://0x9900.com/images/mmdvm-hotspot-180.jpg Pi-Star hotspot https://0x9900.com/alternatives-to-hwef-antenna 2024-12-12T10:28:00+00:00 yearly 0.5 https://0x9900.com/hwef-antenna-pros-cons-and-why-im-not-a-fan 2024-11-28T11:25:00+00:00 yearly 0.5 https://0x9900.com/cable-comparison-tool 2024-07-22T17:58:00+00:00 yearly 0.5 https://0x9900.com/images/RG213-240-180.png RG-231 Coaxial Cable https://0x9900.com/images/pixel.png Compare https://0x9900.com/coax-cable-loss-and-the-impact-of-bad-swr 2024-07-03T06:44:00+00:00 yearly 0.5 https://0x9900.com/images/coax-240-180.png Heliax Coaxial Cable https://0x9900.com/images/vswr_wave-800.webp Standing wave with 100% reflection on a lossless line https://0x9900.com/measure-resonance-using-a-nanovna 2024-06-12T16:09:00+00:00 yearly 0.5 https://0x9900.com/images/NanoVNA/IMG_1421-760.JPG Small trap using thin coax https://0x9900.com/images/NanoVNA/IMG_1420-760.JPG 20 meter trap from a QRP antenna https://0x9900.com/images/NanoVNA/IMG_1426-760.JPG Smith Chart showing the reactance https://0x9900.com/grid-dip-meter 2024-06-06T07:06:00+00:00 yearly 0.5 https://0x9900.com/images/dipmeter/dipmeter-180.png Old HEATHKIT Dip Meter https://0x9900.com/images/dipmeter/Sensor-180.png Sensor Coil https://0x9900.com/images/dipmeter/RigE_T1-750.JPG RigExpert AA-230 - Trap made with thin coax https://0x9900.com/images/dipmeter/RigE_T2-750.JPG RigExpert AA-230 - 20/40 meter QRP antenna trap https://0x9900.com/images/dipmeter/NVNA_T1-750.JPG NanoVNA - Trap made with thin coax https://0x9900.com/images/dipmeter/NVNA_T2-750.JPG NanoVNA - 20/40 meter QRP antenna trap https://0x9900.com/space-weather 2024-05-27T09:41:00+00:00 yearly 0.5 https://0x9900.com/images/sunactivity/dlayer-760.png D-Layer absorption after an X-class Flare Click on the graph for the current data https://0x9900.com/images/sunactivity/xray_flux-760.png X-Ray Flux Click on the graph for the current data https://0x9900.com/images/sunactivity/xray_flux-760.png Sun Spot Number Click on the graph for the current data https://0x9900.com/images/sunactivity/proton_flux-760.png Proton Flux Click on the graph for the current data https://0x9900.com/building-a-delta-loop-2 2024-02-13T06:51:00+00:00 yearly 0.5 https://0x9900.com/images/DeltaLoop/RealLoopSmith-760.png Delta look with and without the 4:1 votage transformer https://0x9900.com/images/DeltaLoop/Construction-760.jpg The team at work! Tony with the antenna launcher (left). The antenna feed point (up right) Connie trying FT8 (down right) https://0x9900.com/building-a-delta-loop 2024-02-01T07:25:00+00:00 yearly 0.5 https://0x9900.com/images/DeltaLoop/DeltaLoop-760.png Delta Loop - Return loss / VSWR https://0x9900.com/images/DeltaLoop/patterns-760.png Delta Loop Radiation patterns - 40, 20, 15, 10-meter bands https://0x9900.com/images/DeltaLoop/DeltaLoopZ-760.png Loop Impedance https://0x9900.com/images/DeltaLoop/DeltaLoopMatching-760.png Delta Loop Matching https://0x9900.com/What-Kills 2023-12-12T16:45:00+00:00 yearly 0.5 https://0x9900.com/images/misc/Electrocution-300.png Zap! https://0x9900.com/adding-the-17-meter-band-to-my-hustler-4btv 2023-09-30T14:41:00+00:00 yearly 0.5 https://0x9900.com/images/Hustler/HustlerMod-1-535.JPG Aluminum bracket at the base of the antenna https://0x9900.com/images/Hustler/HustlerMod-2-535.JPG The small PVC pipe holds the top of the wire https://0x9900.com/images/Hustler/Hustler-4BTV-17m-smith-vswr-760.png 4BTV 17m mod Smith chart & SWR https://0x9900.com/SMRC-Hunt 2023-09-24T16:39:00+00:00 yearly 0.5 https://0x9900.com/ground-plane-antenna 2023-06-08T07:41:00+00:00 yearly 0.5 https://0x9900.com/images/0.25-antenna/impedance-535.png Impedance function of the radial's angle https://0x9900.com/tips-for-mastering-repeaters 2023-05-22T14:24:00+00:00 yearly 0.5 https://0x9900.com/the-hf-bands 2023-05-20T15:31:00+00:00 yearly 0.5 https://0x9900.com/images/Bands/HFBands-320.png HF bands in the US https://0x9900.com/100-countries-in-2-weeks-with-10-watt 2023-03-23T09:46:00+00:00 yearly 0.5 https://0x9900.com/images/AutoFT8/NA-latest2-760.png Band Activity shows openings on several bands towards Europe https://0x9900.com/images/AutoFT8/NA-latest-760.png Band Activity shows the bulk of contacts are on 10 meters between North America and Europe https://0x9900.com/tracking-weather-balloons 2023-01-04T05:28:00+00:00 yearly 0.5 https://0x9900.com/images/RS/RSLaunch-320.jpg Radiosonde Launch (NOAA) https://0x9900.com/images/RS/AtticPI-320.jpg Sonde tracker installed in my attic https://0x9900.com/images/RS/GoogleEarth-Sonde-760.png Weather balloon path on Google Earth https://0x9900.com/common-mode-current-choke 2022-12-17T14:35:00+00:00 yearly 0.5 https://0x9900.com/images/CMC/Mix31-760.png Tests with Mix-31 https://0x9900.com/images/CMC/Mix43-760.png Tests with Mix-43 https://0x9900.com/images/CMC/IMG_1009-320.JPG Test setup https://0x9900.com/images/CMC/CMC-760.png Attenuation https://0x9900.com/images/CMC/CMC_Z-760.png Choking Impedance https://0x9900.com/images/CMC/RG58-Ugly-760.png 6 inch - 12 turn - Ugly Balun https://0x9900.com/hustler-4btv-cleanup-tuning 2022-11-30T14:35:00+00:00 yearly 0.5 https://0x9900.com/images/Hustler/so239-problem-320.jpg Broken wire https://0x9900.com/images/Hustler/4btv-10m-smith-vswr-760.png Hustler 4BTV 10-meter VSWR https://0x9900.com/images/Hustler/4btv-15m-smith-vswr-760.png Hustler 4BTV 15-meter VSWR https://0x9900.com/images/Hustler/4btv-20m-smith-vswr-760.png Hustler 4BTV 20-meter VSWR https://0x9900.com/images/Hustler/4btv-30m-smith-vswr-760.png Hustler 4BTV 30-meter VSWR https://0x9900.com/images/Hustler/4btv-40m-smith-vswr-760.png Hustler 4BTV 40-meter VSWR https://0x9900.com/images/Hustler/4btv-fs-rl-760.png Hustler 4BTV Return loss https://0x9900.com/images/Hustler/4btv-fs-vswr-760.png Hustler 4BTV VSWR https://0x9900.com/telegram-propagation-bot 2022-06-18T13:11:00+00:00 yearly 0.5 https://0x9900.com/images/bot/Telegram-340.png Telegram Screenshot https://0x9900.com/images/bot/kpindex-640.png PK index https://0x9900.com/images/bot/flux-640.png 10.7 cm Flux https://0x9900.com/images/bot/ssn-640.png Estimated Sun Spot Number https://0x9900.com/images/bot/dxcc-202206182017-640.png DXCC traffic from North America https://0x9900.com/moxon-antenna-calculator 2022-05-07T17:20:00+00:00 yearly 0.5 https://0x9900.com/images/moxon/IMG_1600-640.jpeg 6 Meter Moxon Antenna https://0x9900.com/images/moxon/Moxon-6m-RP-640.png 6 Meter Moxon Antenna https://0x9900.com/images/moxon/Moxon-6m-640.png SWR bellow 2.5:1 on the entire 6 meter band https://0x9900.com/building-a-double-bazooka-antenna 2022-04-18T16:59:00+00:00 yearly 0.5 https://0x9900.com/images/bazooka/DoubleBazooka-640.png How to build a Double Bazooka Antenna https://0x9900.com/images/bazooka/6m-SWR-640.png Double Bazooka 6M SWR https://0x9900.com/images/bazooka/6m-Smith-640.png Double Bazooka 6M Smith Chart https://0x9900.com/images/bazooka/doublebazooka-psk-640.png 6 meter double bazooka on PSKReporter https://0x9900.com/building-a-dummy-load 2022-04-04T16:57:00+00:00 yearly 0.5 https://0x9900.com/images/dummy/cantenna-240.jpg Cantenna Dummy load https://0x9900.com/images/dummy/dl-200-SWR-HF-740.png Dummy load SWR on the HF bands https://0x9900.com/images/dummy/dl-200-RL-HF-740.png Dummy load Return Loss on the HF bands https://0x9900.com/images/dummy/dl-200-SWR-VHF-740.png Dummy load SWR on the VHF bands https://0x9900.com/images/dummy/dl-200-RL-VHF-740.png Dummy load Return Loss on the VHF bands https://0x9900.com/images/dummy/dl-200-SWR-UHF-740.png Dummy load SWR on the UHF bands up to 800MHz https://0x9900.com/images/dummy/dl-200-RL-UHF-740.png Dummy load Return Loss on the UHF bands https://0x9900.com/images/dummy/IMG_0900-540.JPG Dummy Load https://0x9900.com/measure-a-capacitor-using-an-oscilloscope 2022-03-24T10:57:00+00:00 yearly 0.5 https://0x9900.com/images/rlc/RC-440.png Schematic https://0x9900.com/images/rlc/rpi-pico-220.jpg Raspberry-Pi Pico https://0x9900.com/images/rlc/SDS00013-680.png Square wave -- Vpp: Pk-Pk[1] = 3.36V https://0x9900.com/images/rlc/SDS00014-680.png Rising edge https://0x9900.com/images/rlc/SDS00015-680.png Falling edge https://0x9900.com/measure-an-inductance-or-capacitance-using-an-oscilloscope 2022-03-18T16:35:00+00:00 yearly 0.5 https://0x9900.com/images/rlc/fork-240.jpg Tuning Fork https://0x9900.com/images/rlc/tank-220.png L-C Tank Circuit https://0x9900.com/images/rlc/rpi-pico-220.jpg Raspberry-Pi Pico https://0x9900.com/images/rlc/tank-sch-440.png Schematic https://0x9900.com/images/rlc/IMG_0896-540.jpg L-C tank breadboard https://0x9900.com/images/rlc/SDS00008-680.png L-C tank ringing https://0x9900.com/images/rlc/SDS00009-680.png Oscillation Frequency https://0x9900.com/how-to-power-your-radio 2022-02-05T16:34:00+00:00 yearly 0.5 https://0x9900.com/images/Wires/IcomPower-640.png Powering your rig https://0x9900.com/images/Wires/IcomManual-640.png Powering your rig https://0x9900.com/images/Wires/battery_drop-420.png Discharge rate (click to zoom) https://0x9900.com/images/Wires/voltage_drop-420.png Voltage drop (click to zoom) https://0x9900.com/antenna-modeling-software 2022-01-31T09:36:00+00:00 yearly 0.5 https://0x9900.com/images/AntennaDesign/Patterns-720.png Antenna Patterns https://0x9900.com/mini-aprs-weather-station 2021-10-13T12:56:00+00:00 yearly 0.5 https://0x9900.com/images/aprs_wx-640.png Temperature graph as shown on the APRS webserver https://0x9900.com/digital-voice-presentation 2021-10-09T11:37:00+00:00 yearly 0.5 https://0x9900.com/images/DigitalRadio-640.png Digital Radio (click to download) https://0x9900.com/water-recirculation-pump-switch 2021-10-06T15:17:00+00:00 yearly 0.5 https://0x9900.com/images/pump/pump-540.jpg Re-circulation pump schematic https://0x9900.com/images/pump/belkin2-280.jpg ESP8266 installation https://0x9900.com/images/pump/belkin1-280.jpg Switch with the temperature sensor cable https://0x9900.com/images/pump/screen-420.jpg Screen shot of the web interface https://0x9900.com/learning-cw 2021-07-23T09:48:00+00:00 yearly 0.5 https://0x9900.com/images/fldigi-cw-740.png Fldigi cw practice screenshot https://0x9900.com/field-day-2021 2021-07-01T18:51:00+00:00 yearly 0.5 https://0x9900.com/images/FieldDay2021/smith-360.png Smith Chart dipole on 80/75-meter https://0x9900.com/images/FieldDay2021/vswr-40-360.png SWR on 40-meter https://0x9900.com/images/FieldDay2021/vswr-80-360.png SWR on 80/75-meter https://0x9900.com/images/FieldDay2021/states_bands-560.png Contacts on 80M and bands worked https://0x9900.com/images/FieldDay2021/80-install-640.jpg 80-meter antenna during installation https://0x9900.com/images/FieldDay2021/setup-640.jpg San Mateo Radio Club field day setup https://0x9900.com/807540-meter-antenna-for-field-day 2021-06-08T12:22:00+00:00 yearly 0.5 https://0x9900.com/images/FieldDay/dipole40_swr-360.png Dipole 40-meter branch https://0x9900.com/images/FieldDay/dipole80_swr-360.png Dipole 80-meter branch https://0x9900.com/images/FieldDay/dipole8040_swr-360.png SWR across the 80-meter band with a parasitic element https://0x9900.com/images/FieldDay/dipole8040-parasitic75-360.jpg Fan Dipole 80/40 with parasitic element on 75 https://0x9900.com/images/FieldDay/dipole8040-transform-640.png SWR across the entire 80-meter band https://0x9900.com/images/FieldDay/dipole8040-transform-swr-640.png SWR across the entire 80-meter band with the 75Ω impedance transformer https://0x9900.com/images/FieldDay/Elevation-640.png Radiation pattern on 80/75-meter and 40-meter https://0x9900.com/reflected-power-and-vswr 2021-04-25T11:16:00+00:00 yearly 0.5 https://0x9900.com/images/SWR/SWR-320.png SWR / Reflected power https://0x9900.com/images/vswr_wave-800.webp Standing wave with 100% reflection on a lossless line https://0x9900.com/images/SWR/bird_43_hd-180.jpg Directional power meter https://0x9900.com/images/SWR/VSWR.svg Reflected Power https://0x9900.com/images/SWR/VSWR-MN-320.png Matching network https://0x9900.com/random-wire-antenna 2021-01-31T14:24:00+00:00 yearly 0.5 https://0x9900.com/images/randwire/connect-280.png Random-wire connection (click to zoom) https://0x9900.com/images/randwire/wire-760.png Length of wire (click to zoom) https://0x9900.com/images/randwire/wire2-760.png Length of wire (click to zoom) https://0x9900.com/using-dude-star-for-digital-contacts 2021-01-29T16:22:00+00:00 yearly 0.5 https://0x9900.com/images/dude-star/dude-star-340.png DUDE-Star screen-shot (click to enhance) https://0x9900.com/images/dude-star/settings-340.png Settings tab (click to enhance) https://0x9900.com/images/dude-star/main-340.png Main tab (click to enhance https://0x9900.com/navtex-for-emergency-communication 2021-01-25T16:55:00+00:00 yearly 0.5 https://0x9900.com/images/navtex-280.jpg Fldigi receiving NAVTEX (click to enhence) https://0x9900.com/followup-on-where-are-all-the-hams 2021-01-19T11:55:00+00:00 yearly 0.5 https://0x9900.com/images/WSPR/heat_world-760.png Active hamradio operators world wide (pskreporter data) https://0x9900.com/images/WSPR/heat_usa-760.png Active hamradio operators in the US (pskreporter data) https://0x9900.com/images/WSPR/heat_eu-760.png Active hamradio operators in Europe (pskreporter data) https://0x9900.com/programming-the-radio-module-sa818 2020-12-28T20:42:00+00:00 yearly 0.5 https://0x9900.com/images/pirim/wpirim-280.jpg PIRIM Raspberry-Hat https://0x9900.com/images/pirim/SA818_bb-760-760.png Connecting the SA818 to a USB FTDI dongle https://0x9900.com/connecting-your-tyt-on-a-raspberry-pi 2020-12-26T11:24:00+00:00 yearly 0.5 https://0x9900.com/images/pirim/pirim-tn-280.jpg PIRIM Raspberry-Hat https://0x9900.com/images/pirim/pirim-db9-tn-280.jpg Raspberry-Hat with the connector installed https://0x9900.com/images/pirim/tyt-connector-tn-760.jpg TYT connector installation with the dab of hot glue to secure the Mini-CT connector https://0x9900.com/hf-antennas 2020-11-10T15:44:00+00:00 yearly 0.5 https://0x9900.com/images/wire-spool-240.jpg An antenna before birth https://0x9900.com/images/HFAntennas-640.jpg HF Antennas slides https://0x9900.com/remote-controlled-antenna-switch 2020-11-06T19:29:00+00:00 yearly 0.5 https://0x9900.com/images/ASwitch/AntennaSwitch-760.png Antenna Switch Schematics https://0x9900.com/images/ASwitch/SwitchHome-280.png Switch Home Page https://0x9900.com/images/ASwitch/IMG_0691-760.JPG Antenna Switch & Bias Tee https://0x9900.com/images/ASwitch/MacSwitch-280.png MacSwitch screen shoot https://0x9900.com/bias-tee 2020-11-04T06:47:00+00:00 yearly 0.5 https://0x9900.com/images/BiasTee/BiasTee-Synopsis-340.png Synopsis https://0x9900.com/images/BiasTee/BiasTee-Pic-760.jpg Bias Tee picture https://0x9900.com/esp8266-environment-sensor 2020-10-01T19:30:00+00:00 yearly 0.5 https://0x9900.com/images/esp/Wemos_D1_mini2-280.jpg ESP8266 Wemos D1 https://0x9900.com/images/esp/prototype-760.jpg Prototype on a bread-bord https://0x9900.com/images/esp/dashboard-760.png Adafruit Dashboard https://0x9900.com/images/esp/iphone-dashboard-240.png iPhone dashboard https://0x9900.com/garden-lights 2020-06-15T19:30:00+00:00 yearly 0.5 https://0x9900.com/images/GardenLights-320.jpeg Garden Lights https://0x9900.com/images/light-box-420.jpg Light Box https://0x9900.com/where-are-all-the-hams 2020-05-07T14:43:00+00:00 yearly 0.5 https://0x9900.com/images/WSPR/WORLD_wspr-760.png Active ham operators world wide (WSPR data) https://0x9900.com/images/WSPR/US_wspr-760.png Active hamradio operators in the US (WSPR data) https://0x9900.com/images/WSPR/EU_wspr-760.png Active hamradio operators in the EU (WSPR data) https://0x9900.com/images/WSPR/PAC_wspr-760.png Active hamradio operators in the Australia / New Zealand (WSPR data) https://0x9900.com/images/WSPR/SA_wspr-760.png Active hamradio operators in South America (WSPR data) https://0x9900.com/baking-bread 2020-05-02T13:55:00+00:00 yearly 0.5 https://0x9900.com/images/baking/IMG_0618-340.JPG Bread dough after 4 hour rise https://0x9900.com/images/baking/IMG_0615-340.JPG Final result https://0x9900.com/80-meter-nvis-antenna 2020-04-27T14:21:00+00:00 yearly 0.5 https://0x9900.com/images/NVIS/NVISPattern-280.jpg NVIS radiation pattern (ARRL) https://0x9900.com/images/NVIS/DiamondNVIS-280.jpg Diamond antenna feed point https://0x9900.com/images/NVIS/distplot-760.png Medium Distance https://0x9900.com/images/NVIS/boxplot-760.png Distance distribution showing outliers https://0x9900.com/images/NVIS/violin-760.png Best chance of contact / distance https://0x9900.com/images/NVIS/contactmap-760.png Contacts map https://0x9900.com/images/NVIS/azimuth-760.png Contacts direction and density https://0x9900.com/i-just-got-my-tech-license 2020-04-17T11:52:00+00:00 yearly 0.5 https://0x9900.com/images/FT-70D-Front-180.jpeg Analog / Digital Radio https://0x9900.com/images/SOTA-Activator-180.jpg SOTA with a yagi and a HT https://0x9900.com/images/CARLA_SF_Antenna-180.jpg CARLA Antenna (SF) https://0x9900.com/images/cubesat-180.jpg Ham Radio Satellite Cubesat https://0x9900.com/images/k0nr_sat_antenna-280.jpg Satellite tracking (K0NR) https://0x9900.com/images/VHF_contest-280.jpg VHF contester from a high vintage point https://0x9900.com/ham-radio-jargon-for-beginner 2020-04-09T06:57:00+00:00 yearly 0.5 https://0x9900.com/images/ARRLLogo-110.jpg ARRL https://0x9900.com/dmr-d-star-cross-mode 2020-04-06T09:27:00+00:00 yearly 0.5 https://0x9900.com/images/DMR-DStar/XLXConfig-680.jpg Pi-Star XLX configuration https://0x9900.com/dmr-with-pi-star 2020-03-19T19:31:00+00:00 yearly 0.5 https://0x9900.com/images/mmdvm-hotspot-180.jpg Pi-Star hotspot https://0x9900.com/images/DMR+/DMRPlusConfig-760.png Pi-Star DMR+ configuration https://0x9900.com/images/DMR+/MD380-tyt-180.jpg TYT MD-380 https://0x9900.com/images/DMR+/DMRSC-1-180.jpg MD-380 Screenshot https://0x9900.com/images/DMR+/DMRSC-2-180.jpg MD-380 Screenshot https://0x9900.com/images/DMR+/DMRSC-3-180.jpg MD-380 Screenshot https://0x9900.com/canadian-ice-road 2020-02-29T22:03:00+00:00 yearly 0.5 https://0x9900.com/images/IceRoad/IMG_0509.JPG Ice Road https://0x9900.com/images/IceRoad/IMG_0510.JPG Ice Road https://0x9900.com/images/IceRoad/IMG_0513.jpg This ice is more than 2 meter (6.5 inch) thick https://0x9900.com/aprs-telemetry 2020-02-28T11:01:00+00:00 yearly 0.5 https://0x9900.com/images/APRS-CPU-Temperature-640.png iGate CPU Temperature https://0x9900.com/common-mode-current-and-chokes 2020-02-23T08:08:00+00:00 yearly 0.5 https://0x9900.com/images/ChokeIntro-640.jpg Common mode current and chokes presentation https://0x9900.com/measuring-toroid-attenuation 2020-01-31T15:20:00+00:00 yearly 0.5 https://0x9900.com/images/ToroidTestAN-180.png Toroid testi using an antenna analyzer https://0x9900.com/images/YellowToroid-760.jpg Yellow Toroid https://0x9900.com/images/43Toroid-760.png Type 43 Toroid https://0x9900.com/d-star-with-an-icom-id-4100 2019-12-30T13:35:00+00:00 yearly 0.5 https://0x9900.com/images/ID4100_head-640.jpg Clear display https://0x9900.com/images/ID4100_screen-420.jpg From: and To: fields https://0x9900.com/high-altitude-weather-balloon 2019-10-09T08:59:00+00:00 yearly 0.5 https://0x9900.com/images/earth_balloon-640.jpg Earth view from a high altitude balloon https://0x9900.com/images/WSPR-TX-Mini-180.png WSPR-TX by ZachTek https://0x9900.com/images/party_balloon-180.jpg Mylar party balloon https://0x9900.com/battery-board-with-protection-cut-off 2019-09-16T15:51:00+00:00 yearly 0.5 https://0x9900.com/logging-on-macloggerdx-with-fldigi 2019-08-11T13:10:00+00:00 yearly 0.5 https://0x9900.com/images/MLDX-760.jpg MacLoggerDX https://0x9900.com/ysf-to-dmr-cross-mode-on-pi-star 2019-08-07T10:15:00+00:00 yearly 0.5 https://0x9900.com/images/FT-70D-Front-180.jpeg Yaesu FT-70D https://0x9900.com/images/YSF2DMROption-760.png Enabling YSF2DMR https://0x9900.com/images/YSFconfiguration-760.png YSF Gateway configuration https://0x9900.com/images/FT-70D_Connect-200.png Connecting to the hotspot https://0x9900.com/images/FT-70D_en-200.png Enter the room number https://0x9900.com/field-day-2019 2019-08-04T18:25:00+00:00 yearly 0.5 https://0x9900.com/images/fieldday2019/RadiationPattern-240.png Radiation pattern show where the nulls are located https://0x9900.com/images/fieldday2019/IMG_0293-640.jpg 40 meter 2 elements installed on the mast ready to be raised https://0x9900.com/images/fieldday2019/IMG_0294-640.jpg 6 elements 3 band, 10, 15 and 20 meter with the 40 meter antenna in the back https://0x9900.com/images/fieldday2019/IMG_0295-640.jpg 6 elements 3 band and the 2 elements 40 meter antenna ready to be used https://0x9900.com/images/fieldday2019/IMG_0297-640.jpg Installing the 15 meter 5 elements with the 20 meter in the background https://0x9900.com/images/fieldday2019/IMG_0299-640.jpg 8 elements 6 meters antenna and the VHF/UHF antenna for satellite work https://0x9900.com/images/fieldday2019/IMG_0309-640.jpg 80 meter 4 element ready, as well as one bonus point for displaying the American flag https://0x9900.com/images/fieldday2019/IMG_0310-640.jpg Me, climbing on the mast to tighten the screws between the mast and the antenna https://0x9900.com/keeping-your-allstar-node-cool 2019-07-28T17:07:00+00:00 yearly 0.5 https://0x9900.com/images/PiFan1-220.jpg FET Switch Module https://0x9900.com/images/PiFan-580.png Fan control experiment https://0x9900.com/going-digital-with-the-ft-70d 2019-07-17T11:16:46+00:00 yearly 0.5 https://0x9900.com/images/FT-70D-Front-180.jpeg Yaesu FT-70D https://0x9900.com/images/FT-70D-AMS-220.png FT-70D AMS selected https://0x9900.com/images/FT2D_Front-220.jpg The X key is for Wires-X https://0x9900.com/images/FT-70D_Wires-220.png Wires blinking https://0x9900.com/images/FT-70D_Connect-220.png Connection established https://0x9900.com/images/FT-70D_en_TN-220.png Input screen https://0x9900.com/images/FusionConnections-580.jpeg What is connected where https://0x9900.com/images/mmdvm-hotspot-180.jpg MMDVM Hotspot on a Pi Zero https://0x9900.com/battery-monitor-for-qrp-operations 2019-07-14T13:55:07+00:00 yearly 0.5 https://0x9900.com/clamp-on-rf-current-probe 2019-07-12T10:12:12+00:00 yearly 0.5 https://0x9900.com/mobile-allstar-node 2019-07-10T18:25:00+00:00 yearly 0.5 https://0x9900.com/images/Allstar_outside-180.jpg AllStar Node plugged to a 7Ah battery https://0x9900.com/images/Allstar_inside-640.jpg Inside the AllStar node https://0x9900.com/images/BF-888-1-640.jpg BF-888 Mods (COS) https://0x9900.com/images/asterisk-640.png Allstar administration menu https://0x9900.com/dmr-or-c4fm-simplex-frequencies 2019-05-18T15:22:31+00:00 yearly 0.5 https://0x9900.com/images/MD380.jpg DMR Radio https://0x9900.com/parachute-mobile-for-allstar-users 2019-04-11T17:12:00+00:00 yearly 0.5 https://0x9900.com/images/ParaMobileInfra-540.jpeg AllStar Infrastructure https://0x9900.com/images/AllStarNode-320.jpg Baofeng and Rapberry Piat the heart of the Allstar node https://0x9900.com/images/RadioHack-320.jpg Baofeng UV-82 modifications https://0x9900.com/aprs-igate-for-parachute-mobile 2019-04-07T16:23:13+00:00 yearly 0.5 https://0x9900.com/images/MarkPara-180.jpg Mark (AF6IM) Getting ready for a 2m jump https://0x9900.com/images/APRSBox-760.jpg APRS iGate assembled https://0x9900.com/images/aprs.fi.png Jumper information on aprs.fi https://0x9900.com/how-to-debug-with-logging 2015-09-26T16:08:00+00:00 yearly 0.5 https://0x9900.com/santa-barbara-wet-wednesdays 2015-09-09T22:49:00+00:00 yearly 0.5 https://0x9900.com/images/SB_Evening_Sail/SBWW/P1040612-640.jpg Wet Wednesday Regatta https://0x9900.com/images/SB_Evening_Sail/SBWW/P1040612-640.jpg Wet Wednesday Regatta https://0x9900.com/images/SB_Evening_Sail/SBWW/P1040620-640.jpg Wet Wednesday Regatta https://0x9900.com/images/SB_Evening_Sail/SBWW/P1040638-640.jpg Wet Wednesday Regatta https://0x9900.com/images/SB_Evening_Sail/SBWW/P1040644-640.jpg Wet Wednesday Regatta https://0x9900.com/images/SB_Evening_Sail/SBWW/P1040648-640.jpg Wet Wednesday Regatta https://0x9900.com/how-to-choose-a-good-password 2015-08-27T11:07:43+00:00 yearly 0.5 https://0x9900.com/images/duo-screenshot-180.png DUO Security https://0x9900.com/images/Dropbox-1-640.png 1. First screen asks for login and password https://0x9900.com/images/Dropbox-2-640.png 2. Second screen asks for the OTP (given by DUO) https://0x9900.com/git-101-the-beginners-guide 2015-08-25T09:56:05+00:00 yearly 0.5 https://0x9900.com/images/git-logo.png GIT Logo https://0x9900.com/images/git-performance-440.png Git Performance https://0x9900.com/create-self-contained-python-executables 2015-08-21T21:06:13+00:00 yearly 0.5 https://0x9900.com/unix-archive-tools 2015-08-13T16:04:02+00:00 yearly 0.5 https://0x9900.com/concatenation-of-strings-in-python 2014-08-23T19:46:13+00:00 yearly 0.5 https://0x9900.com/this-engine-pulls 2014-07-27T19:20:00+00:00 yearly 0.5 https://0x9900.com/images/KTM-HWY1-520.jpg KTM Adventure California HWY1 https://0x9900.com/python-descriptors 2013-09-01T17:23:10+00:00 yearly 0.5 https://0x9900.com/two-factor-authentication-with-ssh-skey-on-openbsd 2013-08-28T20:23:42+00:00 yearly 0.5 https://0x9900.com/images/OTP.jpg https://0x9900.com/managing-records-in-python 2013-03-14T21:23:10+00:00 yearly 0.5 https://0x9900.com/optimizing-your-code-with-__slots__ 2013-02-22T13:23:48+00:00 yearly 0.5 https://0x9900.com/using-free-public-dns-servers 2013-01-05T19:47:56+00:00 yearly 0.5 https://0x9900.com/embedding-openbsd 2012-12-05T23:12:43+00:00 yearly 0.5 https://0x9900.com/images/alix_top-180.jpg Alix board https://0x9900.com/http-status-codes 2012-11-28T10:49:22+00:00 yearly 0.5 https://0x9900.com/spam-filtering-with-openbsd-and-making-spamming-a-little-harder 2012-11-25T20:49:22+00:00 yearly 0.5 https://0x9900.com/images/spamd.png Spantrap Architecture https://0x9900.com/images/zonbu-back2.jpg Embedded OpenBSD https://0x9900.com/images/TRAPPED.png trapped addresses https://0x9900.com/bash-tip-beware-of-spaces 2012-10-21T22:08:02+00:00 yearly 0.5 https://0x9900.com/bash-tip-the-importance-of-testing-that-variables-are-defined 2012-10-16T23:23:48+00:00 yearly 0.5 https://0x9900.com/using-openbsd-to-build-a-secure-access-point 2012-09-24T22:23:10+00:00 yearly 0.5 https://0x9900.com/images/alix-240.jpg Alix PCEngine https://0x9900.com/images/homerouter-400.png Home Network https://0x9900.com/build-you-own-stratum-1-ntp-server-for-less-than-100 2012-08-26T22:23:10+00:00 yearly 0.5 https://0x9900.com/images/wyse-tn-220.jpg Wyse WinTerm https://0x9900.com/images/ntp-garmin-480.jpeg Connecting the garmin to your computer https://0x9900.com/images/jitter-640.png NTPD Gate: Jitter Graph https://0x9900.com/images/home-ntpd-640.jpg Home NTP server https://0x9900.com/how-ssd-works 2012-03-31T12:13:10+00:00 yearly 0.5 https://0x9900.com/images/ssd-blocks-480.jpg SSD Blocks https://0x9900.com/images/ssd-180.jpg Flash memory https://0x9900.com/arduino-temperature-and-humidity-sensor 2012-02-21T21:23:11+00:00 yearly 0.5 https://0x9900.com/using-ssh-with-an-ssh-bastion 2012-01-18T12:23:11+00:00 yearly 0.5 https://0x9900.com/images/ssh_bastion.jpg ssh bastion https://0x9900.com/exim-vacation-messages 2011-12-21T21:23:11+00:00 yearly 0.5 https://0x9900.com/heartbeat-code-for-cluster-environment 2011-07-24T21:32:00+00:00 yearly 0.5 https://0x9900.com/twitter-weather-station 2011-07-16T21:23:10+00:00 yearly 0.5 https://0x9900.com/print-system-messages-on-an-lcd-display 2011-07-16T21:23:10+00:00 yearly 0.5 https://0x9900.com/prime-numbers-using-python-generators 2011-06-21T18:33:10+00:00 yearly 0.5 https://0x9900.com/growable-mac-disk-image 2011-03-03T12:23:11+00:00 yearly 0.5 https://0x9900.com/network-programming-with-bash 2011-01-25T12:52:11+00:00 yearly 0.5