eBay Antenna Reviews, Ratings, and Discussion


Moderator, , Webmaster of EV's Antenna Blog
I agree. Im going to dissassemble that thing, and see what's what and what I can do with it. I have a Tru-Spec UVSJ if I need one. Looks like the VHF and the UHF both have their own custom(or otherwise) matching transformers so Ill keep those in the loop. Might be interesting.

Jason Fritz

Staff member
A-Neutronics AV ANI-851 eBay Chinese Rotor Rotating 360 Remote Control Antenna Review

Here is the box.

Here you can see the items in the box...now out of the box. Bugaboo: This thing takes some assembly, and more than your average antenna or consumer electronics item.

Here is the Remote Control and Cables and Remote Controlled Controller Box for the Rotor. I dont know if the amp is in this box or at the antenna end. My guess is its here in this box...which is less than ideal. You cant turn the antenna without the Remote Control. (Edit: The amp could be in the box at the bottom of the mast where the white coax leads into.)

Here are the connections on the back of the box and the power switch. Bugaboo: Note the proprietary connections for TV1, TV2, and Antenna. Bugaboo: The antenna itself has permanently attached RG59 about 45ft long, which plugs into the box here. You only get one cord to plug a TV in, so you're screwed. (Maybe this is a foreign standard and you can find connectors like this...anybody know?...but I dont want the hassle. (EDIT: I guess you can use a splitter if necessary on the one 6ft adaptor cable as a solution.)

Here you can see the short 6ft or so cable with the proprietary connection on one end and the F connector on the other....which came with the stinger pre bent...so the unwary could run into an unexpected hassle trying to connect this blindly to the back of the TV.

Here is a picture comparing the size to the widely known DB2 and the Quantum FX Indoor which is about the size of the Radio Shack 1880.

Here is the balun for the VHF section of the antenna. You didnt know this had a VHF section? Well me neither till I opened the box and inspected the antenna. The 2 outside loops of the reflector screen which measure 16" wide and 9" high and are made of aluminum. There are 2 of them one on top and one on the bottom with 2" separation between them with insulators which stand them off from the rest of the UHF section reflector screen. The total size of the reflector screens together is 20" vertical and 16" horizontal.

You have to strip a small piece of RG59 coax that leads towards the rotor unit and somewhere joins the UHF signal....and connect the VHF balun box.

Here you can see the plastic housing of the rotor, as well as the aluminum shaft. There is the UHF balun box up front. The UHF loops are 9" horizontal and 7" vertical diameter, with a 17" spread from the bottom of the bottom loop to the top of the top loop which leave 3" spacing between or a little less because the loops go into the UHF balun box and disappear. Also note the attachment of the upper and lower VHF elements on the rear behind the VHF balun box. The spacing between the reflector screen(and VHF elements) and the the UHF elements is about 5.5".

Bugaboo: The fit and finish of this antenna leaves something to be desired, as you can see the UHF loops are skewed and the reflectors vary from plane, the aluminum corners arent nicely machined. The reflector screen inside the VHF loops, are of low quality and the weld busted on one of horizontal steel bars and now I have a free floating spine on one of the reflectors.

Bugaboo: The performance of this unit leaves something to be desired as well....it was dissappointing. I initially had high expectations for this unit, because the design seemed sound with the dual loops like on the ClearStream2 or the Radio Shack 1880....and seeing the VHF loops and matching transformer balun box, my hopes rose further. However this unit was marginal at best. I tested it against the highly regarded legendary Radio Shack 1880 and the RCA ANT108 basic unamplified Rabbit Ears & Loop(a good antenna for that category). The Radio Shack 1880 did well, bringing in all my stations (including VHF Ch. 7 with the dipoles adjusted horizontal and extended 15" each and Ch. 16 off the backside), except my weakest or most problematic channel 4 WCIV (Real Channel 34). The RCA ANT108 came in next and adjusting the Rabbit Ears similar to the RS 1880 above also pulled in Ch. 7 but on the digital cliff, and brought in all stations except Ch. 5 WCSC (RC 47) and Ch. 4 WITV (RC 34) including 16 (my closest and strongest channel) "off the backside" (well this si a bi-directional antenna so). The good performance of the basic RE&Loop is evidence of good atmospherics at the time of testing these 3 units as Im very familiar with this antenna and its performance over time at this location....which makes the A Neutronics performance even more dissappointing given its dismal showing. It was only stable on 2 of my strongest post transition channels (24 WTAT RC 24 and 36 WMMP RC 36). I wanted this to do better and tried to use the extra 45 foot of coax to walk it outside and find a better sweet spot....but I could only get Ch. 2 WCBD (RC 50) to lock and got pips of digital cliff on Ch. 5....it did bring in Ch. 16 when I turned it around and pointed in that direction....and I did find a lock on 7 in a sweet spot so the VHF loops are working...this was with a lot of dancing around with the antenna though. Bottom line....the basic unamped Rabbit Ears & Loop smoked it!

And to top it all off, I couldnt get the rotor to work, and couldnt figure out why for the life of me...trying to troubleshoot it....after some frustration....turns out the darn remote is a dud...no power on the remote and no rotor controls on the controller unit box. More poor quality.

I wanted to like this antenna....

Nicely sized 9" double loops for UHF with good reflector spacing....VHF loops maybe a bit smallish but the thought was great with insulated stands offs from the UHF reflector screen.....thick aluminum for the VHF and UHF elements....integrated rotor with remote control.....but alas....

NOT Recommended


Promising innovative design.
Thick gauge aluminum loops on UHF and VHF.


Non-standard connectors and permanently attached coax.
Somewhat difficult and complicated assembly.
Poor build quality.
Poor material quality.
Poor fit and finish.
Poor quality control.
Poor performance.
Great review EV. Rotor doesn't work out of the box?? Definitely an "F" for quality control. All of the testing on the ANI-851 was indoors, correct? Also, when you get a chance, how well does the RS 1880 perform for you for VHF channels?


Moderator, , Webmaster of EV's Antenna Blog
Ther Rotor may work, but its useless without a working remote....which has a power problem. I may try to fix the remote first, but Id just assume strip away all the riffraff from this antenna, and analyze its performance. I have a sneaking suspicion that the amplifier isnt working properly either and thus is acting as an attenuator.

I walked the A Aneutronics outside using its 45 feet of coax to find sweet spots on the North side of the house. The others were just tested on the sweet spot lamp in the wall of windows to the West and North corner by the TV. (the usual spot).

Believe it or not, the first time Ive tried VHF DIGITAL with indoor antennas is just the other day with these 3 antennas. With the good atmospherics the RS 1880 did great on VHF High Real Channel 7 for the very short time I had it connected.

The RCA ANT108 doesnt allow you to fold the Rabbit Ears all the way down horizontal (probably to about 30 or 45 degrees up from horizontal each)...which I dont like. And also only allows the Rabbit Ears to fold out inline with the loop which is a feature I actually like. The way its done with the walls of the base also acting as guides gives structural strength and reinforment to the Rabbit Ears and therefore tougher....making it even better as a backpackable portable solution.
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Moderator, , Webmaster of EV's Antenna Blog
Two more things about the RCA ANT108 that make it a great little antenna, especially for backpackability and portable usage. Its loop is thick and its stationary, it doesnt adjust move....very strong. And the Rabbit Ears are also sturdy as far as those things go, compared to a lot of others Ive seen. They are tightish within each other to hold their extension at the desired length. And also when you fold them out, they move into grooves (hard to explain) but at 3 or 4 locations they snap into place almost...so they will stay put in that position if they are knocked about a bit....and you can fold them straight up vertical running parrallel to each other, fully retracted in this vertical position...they make a tight sturdy packable antenna.

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Moderator, , Webmaster of EV's Antenna Blog
Pics of dissassembled A Neutronics...

Maybe some of the more electronically inclined can comment. The amp is definitely in the controller box. If I could get the remote working Id have a working light duty rotor...perhaps I could take the amp out of the loop too....so Id just have a rotor.

Dont know whats wrong with the remote. The power leads seem to be connected properly. And yes I tried different batteries.

I really like the antenna, in the clear. I need to get an F connector for the VHF coax, do I need a crimping tool? Then I can use my UVSJ and test the antenna. I may test the UHF by itself as Im anxious to find out if the electronics really were messing up the antenna.

Dissassembled everything with one extra small screwdriver....well I had to cut the coax too.

Naked A Neutronics The rotor unit came right off with 2 screws (also had to cut the VHF coax which is hardwired unlike the UHF side...wonder why they couldnt add a male F connector to the backside where the VHF comes into the rotor unit).

Rotor unit

Rotor interior close up

Rotor interior close up

Box at bottom of mast of rotor unit

Controller/Amplifier/Power Supply/Cable Connections Box

Remote Control

Remote Control Close Up
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Jason Fritz

Staff member
Two more things about the RCA ANT108 that make it a great little antenna, especially for backpackability and portable usage. Its loop is thick and its stationary, it doesnt adjust move....very strong.
I'm about to finish my review on a Phillips Magnavox UHF/VHF indoor, and I can adjust the loop pretty easily 360 degrees because it's on a swivel mount. Is adjustability not that important for the VHF loop element when tuning in digital signals?


Moderator, , Webmaster of EV's Antenna Blog
The loops with the twistup wire adjustability, seemed to be useful for old analog signals, IIRC.

I also remember that those things were abused and often failed at the weak joints....back in the day. But for digital? I dont know if your average person could benefit from it. It would be more like an excercise in voodoo, perhaps more frustrating.

I like the limited options of the RCA ANT108 which gives it some of its sturdiness. It gives you an upper limit to the voodoo reception dance.


Moderator, , Webmaster of EV's Antenna Blog
You might look into one of these Jay....Rhembrandt branding Ive seen on those dual loop styles though there are probably others. I think like the FM crossed folded dipoles you lose about 2db gain from a standard loop but gain omni directional functionality as opposed to bi-directionality of the single loop.


I wonder how the smaller loop (which I suppose was for better gain on the upper part of the old UHF television spectrum Ch. 69-83 or perhaps 51-69) affects the larger loop. This is similar to the situation with the A Neutronics VHF loops.


Jason Fritz

Staff member
You might look into one of these Jay....Rhembrandt branding Ive seen on those dual loop styles though there are probably others. I think like the FM crossed folded dipoles you lose about 2db gain from a standard loop but gain omni directional functionality as opposed to bi-directionality of the single loop.

EV, what's with the dipoles on the antenna to the left? :confused:


Moderator, , Webmaster of EV's Antenna Blog
Good Question! Let's ask Piggie.

Capacitance Hats? Insulators? SWR Killers?

Ive seen stuff like these on Ham antennas, where you put insulators or some such on the antenna to shorten the length and tune the antenna or some such. Then you remove them and lengthen the line for another frequency band. Or maybe it had to do with resistance and ohms.

Piggie where are you? We need your expertise.

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Moderator, , Webmaster of EV's Antenna Blog
Update on the A Neutronics...

Review continued....

Without most of the suspect Chinese electronics between the naked antenna and the tuner, this antenna is performing great (at least on UHF).

Its hooked up to a 6 foot coax with an F-connector adaptor to the short coax lead out of the UHF balun box of the A Neutronics front loops.

Picked up all stations....including my most troublesome Channel 4 WCIV (RC 34)....solid no pixelation......except for VHF High channel 7 WITV (RC 7).....but I didnt have the VHF loops hooked up, yet! This was UHF double loops only. Channel 16 off the backside....solid.

I referenced against the RCA ANT108 basic RE&Loop in the same location directly afterwards. The RCA was giving 16,24,36 (all with same RCs as call numbers) solid. Also it was giving bad unwatchable pixelation, basically frozen pixelated images from time to time, on 2 (RC 50), 5 (RC 47), and 7 (RC 7) and nothing on 4 (RC 34)

Cant wait to wire up the VHF loops and combine them into a UVSJ to see how it does on VHF High!

Its a shame the electronics are so shoddy on this thing. If everything worked as advertised, low noise amp, rotor control etc....then this thing would sing! Perhaps others got luckier than I. If so they got a very good antenna.

Perhaps I should update the original review?
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Moderator, , Webmaster of EV's Antenna Blog
I hooked up the DB2 in the same location, for a double check. The naked A-Neutronics is at least performing on par with the DB2 on UHF. Indentical reception recorded.


Moderator, , Webmaster of EV's Antenna Blog
Another thing that makes the RCA ANT108 a nice portable antenna is is very thin 75ohm coax wire. Although its barely shielded, it wraps around the base and elements without bulk.


Moderator, , Webmaster of EV's Antenna Blog
Quantum FX ANT-104 Review

Comments coming soon!

Here is the box, along with the A Neutronics for comparison.

Box and contents. You can see the rotor is hard wired with about 45 ft of what Im calling RG59.

Here are the 2 pre-assembled boom sections that you join together. Notice the driven UHF loop is on the backside boom.

It slides up and you put a small screw into its plastic mount and the boom, after you join the 2 booms together.

Looking down the barrel, of fully assembled Quantum FX ANT-104.

Topside view. All the elements are thinnish walled aluminum tubing.

Seen here next to naked A Neutronics 891 for comparison.

Another side view, notice the stamped wing nuts on top to secure the booms together and the rotor to the boom. These would collect and hold water....probably should be replaced with regular nuts. Then again this antenna doesnt seem particularly outdoor weather worthy.

Here is the remote and controller box which contains the amplifier. This box is made of tougher plastic than the A Neutronics....and has the on/off and reset button on the top of the unit. The remote is made of the same tough plastic. The remotes battery compartment seems ill shaped, having too much volume, but a very tight squeeze for the batteries from end to end. I had some difficulty getting them to seat properly, but eventually strong armed them in there, where they stayed firmly with use.

Here is the backside of the controller box. Unlike the A Neutronics, it uses standard F connectors on all parts. 2 TV outputs (one pre-wired 6 ft. coax), 1 Antenna in, and the 6 ft. power cord. Labelled with raised lettering (back of top of box), kind of hard to see, but the over exposed picture makes it seem more difficult. I liked this box/remote design and function better than the A Neutronics.


Rotor Control

The rotor control worked pretty well on this unit. It seems a bit under-engineered and imprecise. I think its probaby a similar pulse driven motor that divxhacker uncoverd on the first page of this thread. But it works, which is more than I can say for the A Neutronics. I might try the A Neutronics rotor with this units box and remote....speaking of which, see the zip lock bag they are in in the 2nd picture from the top....it looks like maybe these are an add in for the US market or some such....which is a step up from the straight Chinese product that the A Neutronics (which has been around since at least 2003) seems to be. Many of these recent Chinese antenna invaders with rotors seem to be shipping with this remote/box combo....and as replacements for the original remotes/boxes...which as far as I can tell, is desireable.

Construction Quality

Generally the quality is fair. The assembly was a bit complicated but not terribly. The elements are all pre-attached to the boom except for the one driven UHF element which is on the boom and just needs to be slid into place and screwed into the pre drilled holes. The plastic frames are work good for the smaller UHF elements, but the for the longer VHF elements in the rear, they are undersized, and would easily be blow out of whack by moderately strong winds if mounted outside. That is a big fumble IMO. If you just twist the antenna back and forth they move around abit and can sit kindof cock-eyed in relation to each other. But kudos for aluminum tubing elements and boom..although I think a little higher wall thickness would have been good on the aluminum tubing. This thing couldnt take a fall from shoulder high very well, with extended elements.


Tuner used is Vizio GV42LF LCD. Here is My TVfool at the Window Lamp location to help understand the review. I am 45 miles South of the tower cluster, flat land, over water for a good part. I also have one station WJWJ 16 that is in the other direction and closer at 23 miles or so.

This antenna was great on UHF....bringing in all of my UHF stations and even 16 (RC 16) off the backside. Just right there in the window on the sweet spot lamp.

However it didnt pick up channel 7 WITV PBS (RC 7). So I investigated further. During assembly the twinlead wire (seen below in the photographs) was connected as per instructions to the largest rear element. There are dual folded dipole elements directly in front of the large rear element. I thought that maybe they were having a deliterious effect on the rear element and VHF Hi reception.....so I spun the antenna around and faced the backside of the atenna toward the Ch. 7 tower and bam, locked a signal but right on the digital cliff. So I walked the unit outside and right out the door aiming the antenna "backwards" picked up Ch. 7, then I spun the antenna around facing "frontwards" toward the broadcast towers and lost tuner lock on the signal immediately.

How to solve this problem?

I decided to disconnect the VHF twinlead from the rear element and attach it to the upper longish folded dipole directly in front of the long rear element. This improved forward VHF High performance allowing me to get an image on the screen. However performance was better on Ch. 7 using the larger rear element and pointing the backside of the antenna towards the tower.

Im thinking about removing the 2 midsized longish elements and seeing how that works. It may affect UHF performance negatively (or it could feasibly improve it). Anyways, the other Chinese antenna I have coming with the single VHF Hi dipole and the UHF reflector screen behind it (seen directly below), may be a better solution, increasing both forward UHF and forward VHF reception. Should be interesting.

Regardless, the UHF performance on this antenna was very good.

Here you can see the twinlead VHF connectors, they slide up between the plastic fitting and the aluminum tubing, and you drop the screws through them to secure. It was easy to change from the rear element to one of the forward elements.

Notice also the closeup of the stamped steel wingnut I was talking about earlier, that would tend to hold water.

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