Author’s Preface: I have revised my inductor coil table numbers and the narrative text pertaining to it. Clint KA7OEI posted a comment on the syndicated version at AmateurRadio.com. He questioned my Q estimates for the JPC-7 coil, based on his own tests as well as the very low numbers I reported. I owe Clint a […]
The work that Rob Sherwood NC0B has contributed to the public over the past decade is unique and an amazing service to hams worldwide. I’m talking about, of course, his summary Table of receive bench tests published at this Sherwood Engineering website. He is independent so no one can think that advertising dollars could skew […]
One of the most valuable tools for amateurs worldwide to use when evaluating HF rigs is the set of bench tests that Rob Sherwood NC0B has provided for quite a number of years now. He ranks the receive tests by his favorite metric: narrow dynamic range in dB. It’s a key for CW contest operators […]
We hams often resort to the common claim to choke the “life” out of RFI on feed-lines or other wire carrying electrical current in our shack environment (and nearby) by using ferrite materials in various forms. So it’s just a reflex action to buy those ferrites to install or to make chokes. Wind-em tight. A […]