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Hi Dirk, They way I have done it in the past whilst trying to optimise loop and loop amplifier setups, was to place a small loop (as small as possible) within the main loop, and feed the small loop

The proper way would be to set up a calibrated test transmitter in the far field zone and sweep its frequency. You can read how LZ1AQ did it on his website. The gain (or more correctly, antenna

Perhaps a silly question: What is the best way to measure the frequency range of an active SRL? I have built a 1m diameter loop with 10mm^2 copper with a NE592 amplifier. First tests show, that it

Joe, Let me add my five cents to your explanation. Any small antennas when their sizes ( either the loop antenna perimeter or the length of dipole antenna ) are physically small, say ten times of

Hi Frederico The losses impact the antenna's efficiency which is a reciprocal thing ie it affects both TX and RX, however on RX we often use very low efficiency antennas, especially when we want a

Hello *VE7VXO.* I have a doubt regarding the losses you mention, which, I understand, are on the transmission with this type of antennas. But, this type of losses like the ones you mention in point 1

"Here is a discussion where the Kraus equation has been found to be incorrect in yielding the loop feedpoint Z." - quoting AA5CT Kraus calculation is not wrong.? The poster has made an unfortunate

Take a look at my project here: /g/loopantennas/files/AF7KR%20projects/Two%20turn%20shielded%20loop It is 100% shielded and 100% balanced (which may make some difference in null

Oh, yes..... I also have a 1-Meter diameter of 0.5" copper tubing loop which is tuned and I occasionally use it for transmitting during the peak of lightning season. The Q is extremely high. 2:1 SWR

Shielded untuned loops are easy to build and far less expensive than buying one ready-made. I have two which I built: 1) A 2-Meter diameter 2" copper pipe with three internal turns and 2) A

Hi Fred; It's non-resonant so it acts like the secondary of an air-core transformer. I had a 48" version for LOWFER work (136 and 472 KHz), but really couldn't see enough signal gain to account for

Good morning Bob, Do you possibly have the same design for 100khz - 500khz? Basically I think the only difference would be the wire length and maybe the loop diameter. Thanks Fred -

Thanks Steve and Bob !

/g/loopantennas/album?id=281378 -- Steve Greenfield AE7HD

Great Bob where can i find it? Regards rinus

Thanks.? Got it.? ? Dave

Remove the underscore at the end and it works. -- Steve Greenfield AE7HD

Jef, the link does not work.? Is there another way to view the article?? ?Dave? K2ZU

Bob, N1KPR <rwbetts@...> updated the album Triple-shield Passive Broadcast Loop ( /g/loopantennas/album?id=281378 ) : Good signal, good nulls

I uploaded a triple shield passive loop that is a common monitor antenna for b'cast stations. I use it with a 15-20dB preamp for home entertainment. That gives a signal strength equal to my 160-meter