@@jeriellsworth Can you tell me why my Anker 15600 mAh USB battery charger/battery pack is shutting down when attempting to power my MLA-30 Active Loop Antenna??? Is there a simple cure to this dilemma? Thanks
That's a wonderful demonstration of voltage and Current distribution around a single loop MLA. Very well done to you Jeri and thank you for your contribution to educating all the young (and not so young) Radio Amateurs and would-be Physicists out there.
Very good. Given that the loop circumference is so small compared to Lambda, the current in a mag-loop does not vary much. The E-field is almost entirely contained in the loop capacitor and therefore the near-field is almost purely magnetic. This is why mag-loop antennas are much less affected by nearby structures - especially metal - and it is a great indoor antenna. Gas discharge bulbs need a high "ignition voltage" but stay on with a much lower voltage.
I've been trying to understand the mag loop antenna for a while now (studying for my Amateur Extra class license!) you explained it so well with awesome visual aid's! Thank you!
Nice visualization method. I've always built loops with the cap at the bottom. Mostly for construction convenience. I've had a fair number of people comment on my vids that the cap should be on top since the most radiation is on the cap side. I would think the bulk of the field is going to be around the current peak, as you see with dipoles. Just my gut instinct though. I've experimented and it *feels* like the radiation is stronger around the coupling loop. I still make plenty of contacts on them and that's what counts. I've done a few small loops for fun. Building one out of junk box parts and winding it on an old milk crate. Made contacts on them QRP as well. You ought to set up WSPR and beacon on the small loop a bit at half a watt just to see who picks you up. You might be surprised. I've found with my 7300 that if I turn the power down to "0" percent, it seems to be about half a watt still coming out. By the way, I'm going to Quartzfest this year. Maybe I'll see you there. It would be neat to get all the you tubers present together for a group photo we could all use on our channels. :-)
I think the loop would radiate the most around the coupling loop because the current is the highest. I need to do a dipole test to compare the amount of current near the end VS near the cap on the mag loop. I'm so excited that you're going to QuartzFest!!! Randy is going. We need to coordinate a few youtuber events during week.
It is a MAG loop and magnetism is generated only by current. Where the current is strongest so is the magnetism. The electric field will be vertically polarized and the magnetic field horizontal when the plane of the loop is vertical.
I love it...a female DX'er. I'm just a shortwave listener...but have made a few different types of antenna for a hobby. My radios of choice are an old large 3 SW band mantle radio (more like close to being a table version), and the other a Sangean ATS505. Both great radios, but the mantle radio belonged to my Mum and Dad, so sentimental. Had a radio tech friend get the old radio going again, this year. Needed a couple of parts, but he was impressed how clean it was inside. Dad being a rad tech in the airforce always kept the inside of it clean. But I haven't been able to use it since he died in 2013. But amazed how well with my indoor frame antenna, how well it is picking up distant foriegn stations....life in the old girl yet. I think it will keep going longer than me....lol.
You should invite Bigclive... He's taught me more than most, excluding Your wise words of wisdom so many years ago... "If you want to learn electronics you have to fail" I felt better about my learning curve, and didn't quit. Thanks Jeri.
Thank you. Got a little flashback to the time when they allowed CB radios to be connected to home made antennas here in germany in the 90's. Up until that time we were all stuck with lambda1/2 or 5/8 fishing rods with radials. Before anyone could say "10W EIRP" i started experimenting with different antennas, feeds and tuning improvements.
If i recall correctly, You still have better than rest of the world and can use packet radio via CB? You can connect "Signalink" to CB and exchange e-mails legally? Am I correct?
Last time i checked it was illegal to transport information from a telephone/modem based public network to PR or vice versa. But.... last time i checked was 1999. And also... as long as you do not cause major fuggubulations you can do what ever you want. There is just no one willing to go after you because your signal is 0.5kHz too wide or simething like that. Shortwave is just no gov estate anymore... they all fell for the micowave hype ^^
That was brilliant. I've had a RF burn, transmitter, 5W, tuning cap contact. They need a better name than burn. Burn just doesn't describe it. It hurt less than a 'normal' burn but did far more, deeper, damage than tapping a soldering iron would.
As always, a beautiful presentation; such a simple but clever way of showing the voltage distribution. You have such a profound understanding of how antennas work that your videos always illuminate more than led's ! Many thanks
In the 60's, dad would take us on road trips...mostly at night. I remember seeing the towers with red blinking lights way out in the countryside and imagined invisible voices streaming through the air. I always wondered which one was talking to our car radio.
Really appreciate your videos .. I remember watching the video where you spoke about the beginning of your electronics journey and I should say it was amazing! Keep inspiring!
In the back of my mind I knew about the voltage potential from working on linear amps back in the late 70's but it makes it easier to understand visually
Hi Jeri, its a long time, that you want be here with a new electronic video. I only saw your fantastic AR glasses. I'm glad to see you gain. Nice and learning video. Dont stop. Stanislav, Slovakia, Europe
Excellent video. I have never understood the relationship of voltage and current in RF. The idea of a short solid copper conductor having different potential along it is alien to me.
Visual, Simple, Practical, therefore memorable! Its good to see girls telling us how things work for a change, and I have never seen this demonstration by a guy, so well done Jeri. If you naturally look good you will get attention, (girls and boys!) If you look good, have a lovely interesting smooth, inviting to listen, voice, you will get attention , If you look good, have an interesting voice AND can keep someone's attention by knowing your subject so well as to make it simpler for those less gifted, to understand a concept, that makes you ABSOLUTELY AWESOME, (besides being pretty , being a girl, having a lovely voice, etc, etc) Thank you for your time making the vid, making it not only informative, but demonstrating that sharing a concept in a more digestible way, knowledge wise, is like donating to charity. You should be feeling pleasantly 'toasty' in presenting a subject that on paper would send students to sleep but you give LIFE to it. Bless you. x G0FUS
Amazing way to demonstrate Current and Voltage . In ressonant point when perimeter of major loop is near a 1/4 lambda, the major current stay opposite capacitor and major voltage opposite de small loop. Some kind of direction in this way. Thanks for sharing. Nice haircut and color. 73 PU2SRZ - Sao Paulo - Brasil
@@arthurmead5341 If you expect Duckduckgo to do everything Google can do, yes, you will be disappointed, but if you just need to search some web pages, it work pretty well. I particularly like that you can use Duckduckgo with Tor without being annoyed with captcha every time you search for something...
Excellent! I remember CB people in the seventies putting neon bulbs at the tip of their antennas and when they keyed the the mic to transmit they would light up. Now I know why!
The good old times when geocities was still around and most websites featured animated gifs with the under construction jackhammer guy something like this. When it was still possible to load most websites with a 19,200 bit/s modem faster then modern websites with 100Mbit/s lines today. ;)
A year ago you did part 1 of your 80/160 loop antenna. When are you going to give us part 2? Enjoy your stuff as always, and would love to see more. _111
I know this video's old now, but this is so cool!! I didn't know that you're an amateur, that's so sick!! I am so inspired by the work you do in games and everything else!!
Very cool thanks for sharing this. Folks note: Low power has high voltage so keep your power into small sloops under 15 watts, and keep your fingers off!
I almost forgot I was subbed to you, good to see you back. From the thumbnail I thought you had a magnatron at the bottom, lol. Then I realized it was a variable capacitor once the videos started in full screen. Nice visual demonstration of power distribution.
Are you joining next week’s WTS conference in Santa Clara, Jeri? I’m speaking about RF-free energy harvesting from and over the human body. You are such an inspiration and a source of forgotten yet valuable knowledge from the old masters! Thank you “Jeri much “
Love to see that you are starting to do videos again!
This was a great demonstration!
@@madscientisthut Thanks!
Man, I wondered... I thought it was UA-cam doing their stupid unsubscribe thing again.
@@jeriellsworth Can you tell me why my Anker 15600 mAh USB battery charger/battery pack is shutting down when attempting to power my MLA-30 Active Loop Antenna??? Is there a simple cure to this dilemma? Thanks
That's a wonderful demonstration of voltage and Current distribution around a single loop MLA. Very well done to you Jeri and thank you for your contribution to educating all the young (and not so young) Radio Amateurs and would-be Physicists out there.
Cool way to visualize the IV distribution.
Made one of these loops with good results, but I'm not sure if larger loop should be earthed.
Over 50 years since I was taught this. Your explanation is so great. Really liked the copper capacitive plates to get the neon to strike! Coooool!
Your videos are a treasure trove of unknown , rarely talked about topics mam!
I have no clue what you are talking about most of the time, But I can't stop watching .
me too
I wish all women were this nerdy, we’d have have that alqubierre-white drive in place and traveling the galaxy already.
You`re in luck, she thinks copper pipe looks cute.
Ashley Clarke but oh on paper it’s poetry.
Nice to have you back and making content again. You have been a great inspiration in the past!
Very good. Given that the loop circumference is so small compared to Lambda, the current in a mag-loop does not vary much. The E-field is almost entirely contained in the loop capacitor and therefore the near-field is almost purely magnetic. This is why mag-loop antennas are much less affected by nearby structures - especially metal - and it is a great indoor antenna. Gas discharge bulbs need a high "ignition voltage" but stay on with a much lower voltage.
This entire concept was completely new to me, this is so awesome! :D
I've been trying to understand the mag loop antenna for a while now (studying for my Amateur Extra class license!) you explained it so well with awesome visual aid's! Thank you!
Jeri Ellsworth, Simone Giertz and Tom Scott uploading videos on the same day, this is a good day.
Love that you are doing video's again. You got me in to electronics.
Nice visualization method. I've always built loops with the cap at the bottom. Mostly for construction convenience. I've had a fair number of people comment on my vids that the cap should be on top since the most radiation is on the cap side. I would think the bulk of the field is going to be around the current peak, as you see with dipoles. Just my gut instinct though.
I've experimented and it *feels* like the radiation is stronger around the coupling loop. I still make plenty of contacts on them and that's what counts.
I've done a few small loops for fun. Building one out of junk box parts and winding it on an old milk crate. Made contacts on them QRP as well.
You ought to set up WSPR and beacon on the small loop a bit at half a watt just to see who picks you up. You might be surprised. I've found with my 7300 that if I turn the power down to "0" percent, it seems to be about half a watt still coming out.
By the way, I'm going to Quartzfest this year. Maybe I'll see you there. It would be neat to get all the you tubers present together for a group photo we could all use on our channels. :-)
I think the loop would radiate the most around the coupling loop because the current is the highest. I need to do a dipole test to compare the amount of current near the end VS near the cap on the mag loop. I'm so excited that you're going to QuartzFest!!! Randy is going. We need to coordinate a few youtuber events during week.
It is a MAG loop and magnetism is generated only by current. Where the current is strongest so is the magnetism. The electric field will be vertically polarized and the magnetic field horizontal when the plane of the loop is vertical.
I forgot how much i love your channel.
I really enjoyed the very straight forward explanation, and the innovative way you made it visible.
I love it...a female DX'er.
I'm just a shortwave listener...but have made a few different types of antenna for a hobby. My radios of choice are an old large 3 SW band mantle radio (more like close to being a table version), and the other a Sangean ATS505. Both great radios, but the mantle radio belonged to my Mum and Dad, so sentimental. Had a radio tech friend get the old radio going again, this year. Needed a couple of parts, but he was impressed how clean it was inside. Dad being a rad tech in the airforce always kept the inside of it clean. But I haven't been able to use it since he died in 2013. But amazed how well with my indoor frame antenna, how well it is picking up distant foriegn stations....life in the old girl yet. I think it will keep going longer than me....lol.
You should invite Bigclive...
He's taught me more than most, excluding
Your wise words of wisdom so many years ago...
"If you want to learn electronics you have to fail"
I felt better about my learning curve, and didn't quit. Thanks Jeri.
Thank you. Got a little flashback to the time when they allowed CB radios to be connected to home made antennas here in germany in the 90's.
Up until that time we were all stuck with lambda1/2 or 5/8 fishing rods with radials.
Before anyone could say "10W EIRP" i started experimenting with different antennas, feeds and tuning improvements.
If i recall correctly, You still have better than rest of the world and can use packet radio via CB?
You can connect "Signalink" to CB and exchange e-mails legally?
Am I correct?
Last time i checked it was illegal to transport information from a telephone/modem based public network to PR or vice versa. But.... last time i checked was 1999.
And also... as long as you do not cause major fuggubulations you can do what ever you want. There is just no one willing to go after you because your signal is 0.5kHz too wide or simething like that.
Shortwave is just no gov estate anymore... they all fell for the micowave hype ^^
That was brilliant. I've had a RF burn, transmitter, 5W, tuning cap contact. They need a better name than burn. Burn just doesn't describe it. It hurt less than a 'normal' burn but did far more, deeper, damage than tapping a soldering iron would.
I wish you were one of my teachers at school . I would have had a much better start in life .
For me you are the best RF & Physic Teacher - thank you (Looking Forward for your 2.Part of your 80m Loop) 73 de DL1LAJ
Thanks!
Good to see you back to making videos again. Like so many others I've missed you.
Came for the utter cuteness, learned something in the process. THANKS!
As always, a beautiful presentation; such a simple but clever way of showing the voltage distribution. You have such a profound understanding of how antennas work that your videos always illuminate more than led's ! Many thanks
Nice short and sweet video showing the current/voltage distribution on a loop antenna.
In the 60's, dad would take us on road trips...mostly at night. I remember seeing the towers with red blinking lights way out in the countryside and imagined invisible voices streaming through the air. I always wondered which one was talking to our car radio.
Very glad to see two videos so close together. I am happy to listen when you are sharing your vast knowledge.
Really appreciate your videos .. I remember watching the video where you spoke about the beginning of your electronics journey and I should say it was amazing! Keep inspiring!
I have been missing class with regards to magnetic loop antennas. Thanks for the video, this inspired me to go read.
In the back of my mind I knew about the voltage potential from working on linear amps back in the late 70's but it makes it easier to understand visually
I am new to amateur radio and this is seriously cool stuff right there! Thank you for sharing!
Hi Jeri, its a long time, that you want be here with a new electronic video. I only saw your fantastic AR glasses. I'm glad to see you gain. Nice and learning video.
Dont stop.
Stanislav, Slovakia, Europe
This was great; always wanted to see this demonstrated. Who needs a Xmas tree - when you have lights on your mag-loop, lol. Thanks!!!
If the neighbors insist on putting up Xmas lights I should be allowed to put up a giant mag loop with LEDs/
@@jeriellsworth Yep, at least when yours blink it means you're actually talking to somebody far away and doing something very useful. 👍
Glad to see another video from you. We've all been waiting for the Part 2 video of the 160/80 meter magnetic loop...
Excellent video. I have never understood the relationship of voltage and current in RF. The idea of a short solid copper conductor having different potential along it is alien to me.
Awesome demonstration, please more similar videos!
Best demo on this topic I've ever soon. Well done, thank you.
Wow! What a fantastic way to show how this antenna actually works. Thanks for doing this.
Very happy to see you back in video land!
Nicely demonstrated! I always thought antennas were very complex, but you make the complex easy to understand. Keep it up!
Good to have you back my queen
I am glad to see you again!
u re huuge inspiration... made me to invent an inverter and start my company ... Thank u
That's a great way to give a graphic and pictorial demonstration of the distribution. Plumbers delight or plumbers nightmare lol
Yes your one of my favorite nerds... rf nerds have always been one of my favorites. 😉😀
This was a very interesting demonstration. Well done. I also look forward to the rest of the story on the 80 meter loop. Thank you.
It's so awesome that you're doing videos again. God bless you and everything you put your hands to.
Jeri - You are absolutely awesome and I am always looking forward next postings.
Thank you! Glad to see you again. Always look forward to seeing what kind of project you're into!
Jeri, you are an inspiration to us all, young and old. Thank you. Tom - K1TA
Great to see you back on the Tube. 73
Would love to see you talking at the local radio clubs. Excellent video.
One of these days I'll speak at the local clubs. I've been resisting, because I don't have much to speak about yet.
Visual, Simple, Practical, therefore memorable! Its good to see girls telling us how things work for a change, and I have never seen this demonstration by a guy, so well done Jeri. If you naturally look good you will get attention, (girls and boys!) If you look good, have a lovely interesting smooth, inviting to listen, voice, you will get attention , If you look good, have an interesting voice AND can keep someone's attention by knowing your subject so well as to make it simpler for those less gifted, to understand a concept, that makes you ABSOLUTELY AWESOME, (besides being pretty , being a girl, having a lovely voice, etc, etc) Thank you for your time making the vid, making it not only informative, but demonstrating that sharing a concept in a more digestible way, knowledge wise, is like donating to charity. You should be feeling pleasantly 'toasty' in presenting a subject that on paper would send students to sleep but you give LIFE to it. Bless you. x G0FUS
Amazing way to demonstrate Current and Voltage . In ressonant point when perimeter of major loop is near a 1/4 lambda, the major current stay opposite capacitor and major voltage opposite de small loop. Some kind of direction in this way.
Thanks for sharing.
Nice haircut and color.
73 PU2SRZ - Sao Paulo - Brasil
I just discovered your channel. What a fantastic resource. Hope you can get back to making these awesome videos soon.
Visible evidence of the distribution, brings the theory to life. Thanks for this. 73, Paul, VE3EBY.
This is so cool! Thank you for posting videos again, Jeri!
Awesome DuckDuckGo T-shirt.
Maybe if duckduckgo was actually good
@@arthurmead5341
If you expect Duckduckgo to do everything Google can do, yes, you will be disappointed, but if you just need to search some web pages, it work pretty well.
I particularly like that you can use Duckduckgo with Tor without being annoyed with captcha every time you search for something...
so nice you are back... i saw all your old videos! welcome back!
Excellent! I remember CB people in the seventies putting neon bulbs at the tip of their antennas and when they keyed the the mic to transmit they would light up. Now I know why!
My favorite nerd you are, also very easy on the eyes with a great voice and brilliant too. Thanks for another magloop vid. 73
Nerd Thunder reminds me of "web rings" of old.
The good old times when geocities was still around and most websites featured animated gifs with the under construction jackhammer guy something like this. When it was still possible to load most websites with a 19,200 bit/s modem faster then modern websites with 100Mbit/s lines today. ;)
Glad to see you are creating more videos once again, thank you.
Good to see you making videos again! We've missed you
missing a thunderclap at the end... great to see you posting videos again, welcome back!
Nice video! The first thing I did after watching was to hit the subscribe button. I will look forward to seeing many more from you.
Fascinating ! Thanks ! Just got a Magnetic Loop on order. Really interesting
I really like the idea of using morse code button thingy as a switch for controlling power, cool vid Jeri! :)
FYI, the "thingy" is called a KEY. Now I need to brush up on my CW !
Glad to have you back producing new content, thanks Jeri :)
Jeri, everytime I see her I'm excited... she's smart, always has a great topic, and cute. Triple threat.
Greetings from Sweden! 🇸🇪
You, lady, just got yourself a new subscriber 🎉
People like you are very few on earth, don't forget it.
Thanks Alot Jeri for making this wonderful video on magnetic loop antenna..
A year ago you did part 1 of your 80/160 loop antenna. When are you going to give us part 2? Enjoy your stuff as always, and would love to see more. _111
I know this video's old now, but this is so cool!! I didn't know that you're an amateur, that's so sick!! I am so inspired by the work you do in games and everything else!!
Happy to see you back on UA-cam!
I love me some LOOP antennas. Compact, null noises, good gain, with reception from sky or horizon.
Very cool thanks for sharing this. Folks note: Low power has high voltage so keep your power into small sloops under 15 watts, and keep your fingers off!
Jeri, you have a gift of training, your the best!
Fantastic demonstration, congratulation!
Making the invisible visible, nice Jeri 👍
Good to see you again and great video!
I've been waiting for video about loops for long time.
Thank you!!!
Nice! Good to see you posting again
the world is good, she's back.....happy
Cool. I always thought about this because you can always find a schematic for electric antennas but none for the magnetic ones.
I almost forgot I was subbed to you, good to see you back. From the thumbnail I thought you had a magnatron at the bottom, lol. Then I realized it was a variable capacitor once the videos started in full screen. Nice visual demonstration of power distribution.
You're adorable and very intelligent. Keep up the good work. I wish I had the electronics knowledge that you
I have zero idea what the hell you're talking about, but I could listen to you tell me about it all day and night.. Oo
Are you joining next week’s WTS conference in Santa Clara, Jeri? I’m speaking about RF-free energy harvesting from and over the human body.
You are such an inspiration and a source of forgotten yet valuable knowledge from the old masters! Thank you “Jeri much “
Thanks for a great illustration of the magnetic loop antenna! Hope to see more videos from you.
73 de KV7M
You have such an amazing mind.
Informative, simply stated, imaginative experiment. Thank you for sharing.
Jeri, you make some of the best videos.... the stock car roll cage was really good. Nice welds too. 👍
So glad to see you're making new vids!
This was quite interesting. I'm imagining this antenna at a Field Day and the attention the lights would garner.
This is awesome to have RF visualized in a Mag Loop !!
I'm deaf but love to 'see' waves ! :)
Absolutely fantastic series of videos , well explained with great demonstrations !
Amazing video again. Thank you very much for the presentations.
73" from Poland de SQ4CTK
Great Demo - A picture is worth a 1000 words - keep it Up, All the best in 2019