K6JCA
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Saturday, December 14, 2024
Do Common-mode Currents Split Equally across Circuit Conductors?
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This post discusses common-mode currents in circuits, examining the commonly-held belief that a cable's common-mode currents are di...
Thursday, December 5, 2024
Do Common-mode Currents Split Equally across Transmission-Line Conductors?
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(This blog post is a companion piece to my post on circuit cable common-mode currents, found here: https://k6jca.blogspot.com/2024/12/do-com...
Thursday, September 19, 2024
RF Directional Bridge: Operation versus Source and Detector Impedances
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During recent correspondence with Owen Duffy, VK1OD, we discussed RF Directional Bridges and their design. One question that arose ...
Monday, August 12, 2024
Repair Log: Fluke 6060B (RF Output On/Off Switch)
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I recently discovered my Fluke's 6060B's "RF Output On/Off" switch was not working: This switch is an elastomeric push-b...
Sunday, July 28, 2024
Repair Log: HP 5216A 7-Digit Counter
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This blog post chronicles my efforts to repair an older HP 5216A Nixie tube counter. The HP 5216A is a 7-digit counter specified to count ...
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