Re: Common_Mode_Chokes Video
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Quick Question.? Who do you purchase your 77 and 75 mix from?
Fred N4CLA
On Mon, Jan 13, 2025 at 11:32?PM VLF Dilletante via <brownpiggin= [email protected]> wrote: I use 77mix for my AM BCB filters. I have to get some 75mix for the usb cables to my Airspy for VLF.
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?I used my giant ferrite VLF loopstick in the aftermath of Helene here in Asheville for some natural radio listening in the middle of the blackout. It was beautiful listening. I used the 1246 turns of #20 over over 10lbs+ of ferrite 45 inches long into a 33k to 600 ohm transformer into a MM-1 Sound Devices preamp using Sennheiser HD620S headphones. It was incredible listening...the best of my life.
? I ran the gain @60db and had to be careful to avoid feedback!
?A real bright spot in the disaster! I could also listen and tell how fast they restored the grid. It was epic. I had no power for a week and no water for 2 weeks. No potable water for over a month.
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?But no AC grid for miles and miles working? Fantastic for natural radio!!!
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