Ham Radio - The GOOZEEZOO(a.k.a. Hamgeek HG-20a) magnetic loop antenna 

for the $88+ dollars I would package it up and return it! Amazon "free returns" won't cost you a penny

Hope we have our "good old Kevin" back for good. Much missed.

I appreciate you spending your own money on reviewing this for us. No loop with tiny caps and a choke like that will perform as they claim. Folks are better off bending some copper by hand. Doesn’t have to be pretty, but does have to be efficient! Have a good weekend and thanks again! -Derek

Hi Kevin, good to see you looking well. Thanks for the video.

Lookin better man. Happy days. 🙂

Two thoughts. Take a dremel tool and cut the back open. Shorten the wires and cover the hole with a piece of flat plastic and a dab of silicone. Second is use the loop for AM radio station listening at night. I bet you can get so many stations out there they overlap. The loop might give you directional discretion. BTW, you look great Kevin. Look like you old self. Glad to see you back and feeling better.

I appreciate you took the effort to draw a schematic. Now I can build and try such a control box myself.

Looking better, I hope you feel better as well. It's difficult to know for sure if this antenna is intentionally bad with intent to maximize profit or perhaps it is defective. If you had the time perhaps you could improve this antenna and do a video about it. Thank you for sharing.

I have a very wide band antenna that handles 100 watts and matches 1:1 across HF, VHF and UHF bands. It sits on my shack desk. It is, of course, my dummy load. Great video.

Tnx Kevin. Nice parts though. Good Hardline for your other loop, nice box… Hmm just needs an inductor and you can make a manual T-match or even a Pi network out of it. Maybe even a pre-selector…? Plenty of opportunity to use your VNA with such projects.

Great to see to back! Thanks for the info about this antenna.

Best wishes for a full recovery Kevin! You are looking and sounding better every video! Sorry about the loop, we all have parts in our junk boxes from wished successes…. ham radio brat

Always love your preroll. Glad you're better.

Thanks for the video. Really gives insight to what to pass up. It looks cool but that's all.

good to see you on

Kevin. Nice to see you again. I hope you're ok in your recovery. Regards from Santiago of Chile. 73's CE3PSD

Don't give them ideas Kevin! Even with the controls on the bottom of the box, the "improved" performance will still be pretty awful! Nicely made main loop though... (and if you put that lossy thin coax feed line, the SWR will look even "better"!)

Thank you, Kevin! Take care of yourself and "Keep the Faith"! 🇺🇸 👍☕

Nice looking dummy load. The loop coax is probably the only thing worth using.

Thank you for putting out objective, quantifiable reviews.

Hi Kevin. This was a very good video and test of the GOOZEEZOO. Those tiny variable caps and thin wire interconnects can't possibly handle more than a few watts of RF because (as you know) all magnetic loops have very large currents and voltages on the loop. I would check the resistance of the loop with a bench supply and then read the mv drop with a DVM across the loop and compute via Ohms Law. it should be about 0.1 ohms or less. Let's also take apart that faulty balun and see why it adds loss and broadens the Q of the loop. Looking forward to the next video. Glad to see you're feeling stronger as time goes forward. 👍73 OM

👍Thanks for video Kevin. I think your idea to repurpose the parts is good.

Great your back doing videos. I've seen other reviews on these loops and none of them good. Fred in the shed had issues trying to tune 11m and I think he did a mod and it worked a little better ? All the best Andy M6APJ

Glad to see your alive and well!

Hello Kevin, Glad to see you up and about. I think I've seen better performance out of DUMMY Loads ! Mag loops are supposed to be "HI Q" antennas. As I recall, HI-Q means NARROW Bandwidth. So their claims of service from 40 Meters to 70 CM just validates it is also LOW Q... A HIGH DOLLAR DUMMY LOAD. That piece of Hardline loop looks impressive :-}

Great video, Kevin. You, no doubt, saved a lot of operators from buying junk. Maybe it's OK for receive only, but so is a 50' length of wire! 😀

Thanks for the review.

It looks like it's good quality. Now I want to see Kevin rebuild it to work the way it should. Thanks again for the videos and I hope you're doing well. 73 de N9JOD

At that price, you could crank up the transmit power and do a "smoke test" 😂 73, K7KS

To Add, I bought a UBeesize CT-50 Tripod for about $15.00 additional for this junky loop. Thanks for your review and warning.

Good to see you 73

Thanks for this.

*Thanks for taking one for the team.* Need to stay away from this one for sure !

This really takes the user for a loop

It does show that a bought aerial doesn't mean it outperforms a home made one. I've made five attic dipoles 20m to 10m, an outdoor 60m inverted vee, two loops for h.f. and a copy of a thing which was around in the 1960's and 70's called a Joystick and 26 foot of wire which tunes 160m to 10m using a supposedly non-working MFJ 16010 tuner I was given. It worked for me. It did stop working after a trip to Wales and I found a wire not soldered and soldered it so I guess vibration moved the unsoldered wire. G4GHB.

Thanks for the warning.

Indoors, I could hear a strong shortwave signal on 15.770, WRMI in Florida

Nothing ventured, nothing gained.

Hi Kevin, Would be interested in how the coax loop works on your homebrew loop. Might not be a total waste of money. 🙂 Stay safe. 73 WJ3U

LoL I can see why you didn't include a link to purchase

Yes, I bought a similar Goozeezoo look like this and it doesn't work well too. It makes a good table top display

It sounds like RG-174. Look it up 0.1 inch OD. 2.8 mm sounds about right.

I would return it too.

I never could make a contact with the stupid loop. I got better results on my own homebrew loop.

Excellent video and tests against the other antennas! Thanks. On the issue of why the efficiency is low, I think its got low-Q capacitors. They're AM radio receiver caps. At this antenna size (2m circumference on 20 meters), the theoretical Q of the resonant loop (X/R) is likely about 2500 and the resonating cap Q should be very high (maybe 5000+). But then tuning would be very sensitive and arcing would likely result on transmit. As is, its still maybe a good receive antenna though (background noise is usually at least 20 dB above theoretical limits - so an efficiency of 0.01 would be fine 🙂) I'm curious. What kind of caps do you have in your homebrew loop (and how sensitive is the tuning)? And is the diameter about the same?

Of all the stupid names for a company, this has to be in the top ten.

I didn't think it would work just based on the claimed specs.

You sure that's coax? That looks like a shower hose they used.

On HF it doesn’t outperform a dummy load that much and on UHF/VHF every loop does better. So…no no no!

If I spoke to the manufacturer I would give them some :cross talk.:

That looks like Heliax, a full copper shield, (basically thin copper pipe with ribs to allow some flex in order to bend it,) that they are using the shield of for their loop. This loop antenna appears to be made out of whatever assortment of junk parts they could find, and poorly 'designed' by someone who knows nothing about RF. Any homebrew $10 loop that is designed and built properly would far outperform this piece of junk. The short coax they provided looks close to RG-174, which might work for HF but is just an attenuator at VHF/UHF. This isn't designed to work. It's designed to take money from the unwary. BTW, with antenna lengths at VHF/UHF being what they are, and vertical antennas being so very cheap and simple, there is really no point in trying to build a much more complex and expensive tunable loop that offers almost no advantage beyond slight directivity to combat noise that likely doesn't exist at VHF/UHF wherever the user is located. Certain types of antennas are advantageous on certain bands, but are seldom optimal on other bands that are far removed.

In absolute best case scenario,this loop will be about 4% efficient at 7Mhz So 5w in = 200mw out at best . Probably more like 0.5% eff due to resistance in coax connections ,switches,cap wipers. So maybe 25mw out. QRRRRRRRRppppp

Hmm. How does the loop do as a rec only antenna? I need a RX only loop!

The box and capacitors might be a basis for a QRP Z-match. And check the skinny feed line COAX with you VNA before you toss it. Yes, it will be very lossy on VHF/UHF, but might be acceptable on the lower HF bands, or for cutting up to make short jumpers.

I imagine that coax being as lossy as it will be broadens the Q making it look wider than it is?

could you do better by changing the coax loop size ???

FB OM

With the included coax it would have worked even worse. Buyer beware.

No inductor loop means it's junk.

Thanks for the review. Think I’ll pass 😊

Its NOT a "MAG" Loop! Am I wrong? Tell me why it IS a "MAG" Loop... My DIY 40M Dual Mag Loop IS and works, by my NanoVNA and SDR RX results.

Hey, Kevin. 🙂 RU-vid works terrible. They may stop it working here soon. Too much complaints for political misuse.

Great video, Kevin. Glad to see you gaining more strength each video. Keep kicking that Covid to the curb. Take care. de VE6HDH