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Topics - N0AJS

General Discussion / Radio System Design-Virtual Course
January 22, 2021, 05:05:45 PM

Found this virtual course on YouTube. It goes pretty deep into how radios actually work. I thought you guys would enjoy watching them. 
Antennas / FT-82-43 EFHW
November 07, 2020, 12:55:11 AM
Taking Gil's idea for using an 82 toroid I built this 64:1 transformer. Although the 3D printed box is a much more efficient use of space, I don't currently own a printer. I did find that a Hammond 1551HBK is about as good as it gets as far as size and ruggedness. The overall dimensions are 60x35x20mm. This does not have a ground connection but i have found that a small coil in my coax generally takes care of any RF on the shielding.  You cannot see attachments on this board.
Ive been plagued with a noisy utility pole since i moved to my new QTH and it has grown to an S8. I think ive narrowed it pretty close driving around with the AM reciever running. It totally overpowers all the AM broadcast several hundred yards away. I was wondering if any of you guys had a good homebrew DF antenna design that i could build to pinpoint this problem.   
Classifieds / WANTED: Elecraft KAT1
September 24, 2020, 05:44:55 PM
Looking for an unbuilt/built internal ATU for the Elecraft K1.