Lmst

In search of distraction from this week’s terrible news updates, have put together a short post on my magnetic loop antenna upgrade. May it offer you 5 minutes of no-politics/war-news… 73

#HamRadio #MagneticLoop #IndoorAntenna

https://qsl.net/n8dmt/magnetic-loop-antenna-upgrade/index.html

Successful update to indoor F-Loop 3 antenna changes from RG-400 loop to a 1” solid aluminum tube with a 7” feed loop. The CHA F-Loop 3 Plus antenna covers 40-10 meters. Manufacturer’s data says antenna efficiency changed from ~88% to ~96% on 10m by changing from RG-400 coax to slightly larger diameter loop and beefier 1” solid tubing. #HamRadio #MagneticLoop #Antennas

Photo of original loop antenna setup (CHA F-Loop 3 Basic) and indoor location.

Photo of updated loop antenna setup (CHA F-Loop 3 Plus) in same indoor location.

Photo of left lower loop mounting point on the CHA F-Loop 3 tuning box

Photo of the top loop connection (wing nut and screw) with thin plastic insulator separating the main loop from the feed loop.

@kr1st No, the loop model is not resonant — with the far field being determined from the aperture size against the perfect ground. This was just a playing-around, quick look at the feed placement to see what happened. The SW supplier has a more detailed model with feed loop and tuning capacitor included on their website. Will look at that next. https://antennasimulator.com/index.php/knowledge-base/magnetic-loop-for-3-5-7-14-21-and-29-mhz/
#HamRadio #MagneticLoop

@ve3qbz @croyle @Geojoek
Just like last year (which was a fail), this summer includes experimenting with 160m antennas.

In addition to possibly #LoopOnGround & a #SlinkyInvertedVee or #LoadedVertical I'm seriously considering trying to make a larger-than-most #MagneticLoop for 160m.

Question for the hams on here since I'm finding somewhat contradictory information on the Internet: Do magnetic loop antennas work (well enough) indoors on 10m? Can't permanently install an antenna or even span one across the backyard (plus, to make things worse, transmitting from the ground floor).
#ham #HamRadio #AmateurRadio #antennas #MagLoop #MagneticLoop #shortwave

Very good conditions on shortwave outside the city in the Harz. Disturbances below S1 and barely noticeable.
#mc20 #magneticloop #OM0ET #qrp #xiegu

Something new and exciting has arrived in the post - De-boxing and testing the Vacuum Variable Capacitor ultimately destined for experiments with magnetic loops.

https://www.youtube.com/watch?v=tTDaw1JN12A

#hamradio #hamradioantenna #magneticloopantenna #magneticloop