HFU HF Underground
Technical Topics => Equipment => Topic started by: jFarley on August 23, 2014, 2141 UTC
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I have recently built a prototype of a resonant receiving loop which is exhibiting enhanced loaded Q. That blog post is here:
http://hfunderground.com/blog/?p=395
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Thanks for the great post on your new loop, I look forward to reading more down the road!
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Thanks, Chris. I look forward to seeing what it's going to do to Wolverine's wide audio. I am pretty sure it's going have a noticeable effect on XFM. ;D
BTW, the tuning range appears to be 3210 - 10180
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Keep up the good work! I was never able to get anything useful beyond 75 meters... All I can say is be very careful of PVC as some of that material can cause problems in RF situations... If it heats in a microwave oven then add that into your calculations... but I am sure you have already consider this...
Keep on keeping one because you are doing better than I did... ;D
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Hey jFarley, congratulations on getting higher Q. I'm not sure what that is but I figure I'll learn it some day.
I see you logged Wolverine after you posted this. I'm curious to know how Wolverine fared on your new hot rod antenna. From what I gather, your new antenna might cut off some of Wolverine's wide bandwidth. Please correct me if I'm wrong.
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Thank you for your kind comments. I am preparing a post for the 30 Below blog which covers the subject of Q, so stay tuned.
Yes, I logged WR with the new loop, and took a couple of screen shots. With the Q levels I was experiencing that night, audio BW clipping was just incipient, but not pronounced; close, but no earth-shattering kaboom yet.
Those caps are on my other computer, and I will post one later.
(http://i1049.photobucket.com/albums/s387/jFarley44/Wolverine31Aug14_zps0d2e6089.png) (http://s1049.photobucket.com/user/jFarley44/media/Wolverine31Aug14_zps0d2e6089.png.html)