tag:blogger.com,1999:blog-35901825.post3256888651624947859..comments2024-03-19T06:03:40.451+10:00Comments on marxy's musing on technology: 80m loop antenna experiment failurePeter Markshttp://www.blogger.com/profile/13007012724570360389noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-35901825.post-24442319862204778102007-12-17T07:49:00.000+10:002007-12-17T07:49:00.000+10:00Wow! You sure did a great job. I urge readers to t...Wow! You sure did a great job. I urge readers to take a look at <A HREF="http://www.vk2zay.net/article.php/141" REL="nofollow">Alan's experiments.</A>Peter Markshttps://www.blogger.com/profile/13007012724570360389noreply@blogger.comtag:blogger.com,1999:blog-35901825.post-87851888414746658242007-12-16T20:11:00.000+10:002007-12-16T20:11:00.000+10:00Peter,I did a bit of practical investigation on th...Peter,<BR/><BR/>I did a bit of practical investigation on this today, to make sure the numbers I emailed you were sane:<BR/><BR/>http://www.vk2zay.net/article.php/141<BR/><BR/>Looks like I was in the right ballpark with the math. The resonant frequencies you observed appear much too high, which suggests you were seeing something else, maybe the transmission line?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-35901825.post-49760444664611843332007-12-15T16:27:00.000+10:002007-12-15T16:27:00.000+10:00By email:Re your loop project; By my back-of-the-e...By email:<BR/><BR/>Re your loop project; By my back-of-the-envelope calcs, 2 metres in<BR/>diameter and three turns should be about 43-47 uH, which will resonate<BR/>at 3.5 MHz with about 45 pF, less the distributed capacitance which can<BR/>be significant if the winding is bunched.<BR/><BR/>The single turn loop with 300 pF should have bottomed out a bit below 5<BR/>Mhz. If you put a fixed 270 Peter Markshttps://www.blogger.com/profile/13007012724570360389noreply@blogger.com