~450MHz Yagi Antenna Update for Easier Mechanical Tuning

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Ultrasonic Projects and others

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I was looking into the latest and greatest microphones, ultrasound microphones and detecting ultrasound in general more real time spectral analysis since I was thinking about modifying the Mini-3 Bat Detector to perform a more automated sweep versus just turning the variable capacitor. Well, I found this interesting video that's inspired me to add an antenna connector onto the Mini-3 Bat Detector or just invest in one of the Franzis systems this gentleman is using in the video: In regards to sonic range recording and maybe getting into the ultrasonic range... there is this build that has some great info regarding the most cost effective lowest noise mic on the market, the Rode NT1-A Studio mic: If you read into the above videos description link, the authors note the amplifier might be good above 100kHz also. Here is the screenshot from the above video of the schematic noted used: See here for above video reference:  https://sound-au.com/project66.htm In regar...
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Noticed Oscillations On Me, Decided to Collect Data Now Have Some Systems Running

I'll update this later in regards to formating, however I wanted to get this data down as I woke up with a mild ringing in my ears and some sort of oscillation on my head/ears/perimeter as well as music that was playing earlier in the day quietly in a distance.  I do usually notice some sort of French Woodsman from Maine Tourettes like behaviors with the voices in my perimeter in crickets or more the aether perimeter.  I also notice more assaults and blame before I wake in the morning too as I did notice that before waking and my dream was I was sleaping in the road in front of my house before the driveway.  Back to the sounds... the source may be a wall at times.  May be a perimeter object like the window.  May be in a point in the airspace around me.  Sometimes they get closer to and in my head... usually when I am resting. I then had a scratchy throat and voices in my head and perimeter and I was replying on more than one instance to stop and they/it d...
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Detection Projects GPIB Controller Resources

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