A Brief History of The Development of Classical Electrodynamics
By Professor Steven Errede
A Brief History of Electromagnetism
Wednesday, January 1, 2020
Tuesday, December 31, 2019
Bifilar and Trifilar Wire Twisting
Over at QRPLabs@groups.io there is s discussion going on about Bifilar and Trifilar wire twisting:
Bifilar and Trifilar Wire Twisting Discussion
Bifilar and Trifilar Wire Twisting Discussion
Tuesday, December 24, 2019
Friday, December 13, 2019
WW II Aircraft Radio Restoration
Gregory Charvat N8ZRY writes on Hackaday about an un-modified-since-WW2 surplus CBY-46104 receiver with dynamotor
WW II aircraft radio restoration
WW II aircraft radio restoration
Sunday, November 24, 2019
K6STI: Baluns for 88-108 MHz
"....An incoming electromagnetic wave illuminates both an antenna and its feedline. Current induced on the outer surface of a coax shield may enter the feedline at the feedpoint. Common-mode signals induced on parallel transmission line may become differential at the receiver. Either makes the feedline an unintended part of the antenna structure, which can degrade the directive pattern and forward gain. A current balun can attenuate unwanted coax shield current. A current or voltage balun can attenuate common-mode signals on parallel line...."
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