Dan Koellen AI6XG5 days ago7 minBig Font Clock Update: Dimmer-Interface PCB and Setup Instructions.A prior post described the development and build of a clock to display time and date for UTC and Local. The clock characters are large, ...
Dan Koellen AI6XGJun 63 minEnd Fed Half Wave Antennas: More About the Primary CapacitorI recently posted a blog claiming that a capacitor in the primary of the matching transformer is not needed for end fed half wave (EFHW) ...
Dan Koellen AI6XGMay 273 minEnd Fed Half Wave Antennas: Is a Primary Capacitor Really Needed?In my research on End Fed Half Wave (EFHW) antennas I found that nearly all have a capacitor in the primary (rig) side of the transformer...
Dan Koellen AI6XGApr 53 minAuto Run for your Raspberry Pi - how to have your Rpi boot up in the desired configuration.The Raspberry Pi (Rpi) is a great single board computer (SBC) that can be used in many projects and comes in different configurations. I...
Dan Koellen AI6XGFeb 99 minBig Font Clock - Relieve for Old EyesRecently the Maker Space that I frequent received a number of 4 line 40 character (4 x 40) LCD displays. They asked me to figure out how...
Dan Koellen AI6XGJan 123 minCastle Peak W6/SN-038 ActivationOperating Position on Castle Peak Looking South Summit Trip Summary Distance: ~ 3.5 mi one way Transport: Hiking Elevation Gain: 1900 f...
Dan Koellen AI6XGJan 124 minSand Ridge W6/NS-155 ActivationOperating Position Looking South From Sand Ridge Summit Trip Summary Distance: ~ 6.5 mi one way Transport: Hiking Elevation Gain: 1200 ...
Dan Koellen AI6XGJan 112 minMount Lincoln W6/NS-149 ActivationLooking east from Mt. Lincoln, Tinker Knob W6/NS-121 is hiding behind Anderson Peak Summit Trip Summary Distance: ~ 3 mi one way Transpor...
Dan Koellen AI6XGJan 112 minSignal Hill (7751) W6/NS-393 ActivationLooking east from Signal Hill, Donner Lake is in the background and Lake Angela in the foreground Summit Trip Summary Distance: ~ 2 mi on...
Dan Koellen AI6XGJan 93 minTinker Knob W6/NS-121 ActivationSummit Trip Summary Distance: 7.2 mi one way Transport: Hiking Elevation Gain: 1870 feet Time: ~3.5 hours one way Route: Via Pacific C...
Dan Koellen AI6XGJan 66 minHow to do a SOTA ActivationSOTA activations are challenging and with risk, be sure you are experienced in hiking, navigation and survival skills.
Dan Koellen AI6XGDec 23, 20193 minSOTA - What is it? Why I do itWhat is SOTA? SOTA, or Summits On The Air, is basically an activity where ham radio operators take their radio equipment to a hill or mou...