Preview Anytone AT-6666

This is a preview and not a definitive review; the sample I got is just a snapshot of a product under development. This means that features, bugs and test data can change. All you’ll get is a basic idea of what to expect. Many thanks go to K-PO, the company that sent me this sample.

The radio didn’t come with a manual, so I tried to figure out the menus by trial and error.

Anytone AT-6666 Front

Anytone AT-6666 Front

Anytone AT-6666 Back

Anytone AT-6666 Back

Dubbed to become the successor of the AT-5555, I wondered if some flaws were fixed, or about to be fixed. When I reviewed the Superstar 6900N, which I still own and use, I ran into a few problems. The most prominent one was the presence of unwanted mixer products up and down the carrier.

CRT France, apparently very annoyed by my findings, refused to send a service manual. This ruled out the possibility of finding the cause, let alone a fix.

Last flaw: 5 KHz steps are too coarse for amateur use.

“Export Radio”
The AT-6666 is one of many so-called export radios. An export radio is basically a CB transceiver that can’t be sold legally in most countries. Either the power output is too high, the frequency range is too wide, or some modes aren’t allowed. In most cases all of the above applies.

The trick some manufacturers use is to initially limit the frequency range to 28.000 – 29.700 MHz and advertise these radios as ham radio transceivers. Suddenly these radios are legal to sell, because ham radio operators may use any mode and generally don’t have to worry about power output restrictions.

The catch: without exception it is very easy to modify these transceivers and change them into an (illegal) CB radio.

Anytone AT-6666 frequency ranges

Band Channels / band
Frequency Range Remarks
A 40 28.0000-28.1950 MHz Amateur mode
B 40 28.2000-28.3950 MHz (Default)
C 40 28.4000-28.5950 MHz
D 40 28.6000-28.7950 MHz
E 40 28.8000-28.9950 MHz
F 40 29.0000-29.1950 MHz
G 40 29.2000-29.3950 MHz
H 40 29.4000-29.5950 MHz
I 20 29.6000-29.6950 MHz
Band Channels / band Frequency Range Remarks
A 40 25.615-26.005 MHz “Export Mode”
B 40 26.065-26.505 MHz
C 40 26.515-26.955 MHz
D 40 26.965-27.405 MHz
E 40 27.415-27.855 MHz
F 40 27.865-28.305 MHz
G 40 28.315-28.755 MHz
H 40 28.765-29.205 MHz
I 40 29.215-29.655 MHz
J 40 29.665-30.105 MHz

Other factory specifications
– Modes: AM/FM/SSB
– Power Output: AM 60 Watts, FM 50 Watts, SSB 60 Watts
– CTCSS and DCS encoder/decoder (optional)
– Automatic Squelch (AM/FM)
– Computer Programmable
– Power / Signal Strength / SWR indication
– Dual Watch
– Scan mode
– Roger beep
– Adjustable echo
– Multi-color display

First impressions
The first thing I noticed is that this radio looks more like ham radio equipment than previous models. The ‘old’ Anytone AT-5555 and all its identical twins can be recognized as CB radios from miles away, but this model could fool you.

The AT-6666 is a small radio: 24.6mm x 15.7mm x 4.8mm  (depth x width x height, heat sink and knobs included). The microphone is simple but ergonomic with Up and Down buttons located on top.

The LCD background color is selectable, something I like a lot.

AT-6666 Colors

AT-6666 Inside
If this is a beta version, it doesn’t show. This is a nice PCB, neatly built.

Anytone AT-6666 InsideRF power is generated by four 13N10 Power MOS FETS (download specs here). Three are mounted at the back, one at the left.

13N10 Power MOS FETS

13N10 Power MOS FETS

Harmonics, Phase Noise and Mixer Products
Whatever Anytone did they did right: the strange, unwanted mixer products are gone, and harmonic suppression is excellent. There’s no phase noise of any importance present, which is a sign of a stable oscillator.

AT-6666 Harmonics

With a harmonic suppression better than 60 dBm, this Anytone joins the ranks of the best.

AT-6666 Carrier

No phase noise, no unwanted mixer products.

Frequency accuracy
At the highest resolution of the counter I measured a difference of +5Hz. Such a small difference is completely irrelevant.

Power Output Measurements (@ 29.000 MHz)
FM: 40 Watts
AM: 15 Watts carrier, 30 Watts @ 100% modulation
SSB: 55 Watts

Not quite at the promised levels yet. Don’t forget that this is a preview sample.

The menus are divided in two parts. One is hidden under the menu button, the other under the channel selector. The menus pop up when you press these keys for about one second.

Channel Selector Menu

  1. Hi Cut (on/off)
  2. Noise Blanker (on/off)
  3. Echo (on/off)
  4. +10 KHz (on/off)
  5. Roger beep (off, 1-5)

Main menu:

  1. Beep (on/off)
  2. Indicator (Off, SWR, Time Out Timer, DC Voltage)
  3. Microphone Gain (1-36)
  4. NOG (monitor volume, 1-32)
  5. TOT (Time Out Timer, Off / adjustable up to 600 seconds)
  6. TSR (High SWR Protection, On/Off)
  7. TDC (High Voltage Protection, On/Off)
  8. SCM (Scan Mode, SQ/Time)
  9. FIN (Fine Tune, RX only / TX only / Both). Adjustable with Clarifier, range ± 1.5 KHz.
  10. Color (LCD background color, for choices see above)
  11. Reset

The front panel of the radio is more or less self explaining. You have an on/off/volume knob and adjustable RF power, RF Gain, Clarifier and Squelch pots. At the back we find a micro USB connector, so there’s no need to open up the radio in order to program it.

On the air
The first thing I noticed is that the quality of the modulation improved. The AT-5555 / Superstar isn’t bad, but a bit on the tinny side. This radio sounds more like my Yaesu FT-900. I could work what I heard, and in the end that’s all that counts. Sensitivity is fine and on par with the previous models.

The verdict
For a beta version there are surprisingly few flaws to be found. Almost all of my gripes were addressed; the AT-6666 is what the AT-5555 should have been, or what I hoped it would be.

There are still a few things on my mind:

  • The price is unknown, hence price/performance is unknown,
  • The passive cooling is likely insufficient. The heat sink gets really hot, and does so in a short amount of time,
  • Still 5 KHz steps at default on 10 meters. Smaller steps can be set by pressing the channel selector momentarily, but the radio will default to 5KHz as soon as you let go. Oh well, it’s a CB radio, right?
  • I didn’t look into all the details of the programming software, but it appeared to work as advertised.

Bottom line: I like this radio. I like it a lot.

45 comments on “Preview Anytone AT-6666

  1. For the export market good punchy audio is important. Much more so than on the Ham bands due to the all the QRM on the “funny” channels. Extra cooling is always good because you never know where the radio will be mounted. As far as output power, well, anything below 300 Watts may as well be 12 Watts. If you need help you need a lot of help, or none.
    The export market has been full of radios just like the AT-666 for years. To sell more than the the other guys Anytone needs to stand out in a crowd. Go big or go home, as they say. The 6666 looks like just another export radio and I see no reason to buy one.

  2. Did it show the same spectral purity in the 27mhz range as well Hans?
    How hot was hot? Was this in SSB or AM/FM modes?
    Were the knobs and buttons easy to manipulate? Not too small?
    Nice review.

  3. A problem I have with my AT5555(v6) is that with the engine not running on the car, on SSB it’s not very linear. When the car is running the transmitted audio is fine but then receive is not so good with QRM from the car and engine noise.
    Can you do a test in a car with engine running and engine off?
    Thanks Hans

  4. Thanks for the info !
    Is it really “steps” or is there a vfo option with a real “vfo” ?
    Thank you for the info !

    Kind regards,

  5. A shame about the VFO, I’ve been waiting for this to hit and see a review, I hope that gets changed before release or in a firmware update. If you can’t at least tune ten meters with a 1khz step it really hinders the rig for hams. Kind of a big market to ignore over such a little thing. Be nice if they could go ahead and pick up 12m with it as well, like the Optima MK3


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  7. I also tested the new ANytone AT-6666

    The measured Ip3 is -15dBm.
    I have testet SSB modulation with dualtone test. Maximum usable power ist 53W where signal is still acceptable clear. To 50W ist very very clear and nice,
    so that the amplifier operates linearly.

  8. I love my old (old?) 5555 – it’s engagingly low-tech, and it has the feel of a 1980s CB with a few advantages. I always get good reports on 29MHz AM and on 28.5MHz SSB. The 6666 looks interesting, though. I do hope it won’t be necessary to take the top off it to programme it for the precise channels you want!

  9. PS. If the ‘export mode’ tunes down to 25MHz, how practical do you think it might be trying to make the rig work on 12m? I know I’m asking you for guesswork here, but you will have a better idea than I will.

  10. What’s still unclear to me: What steps are default when turning the big knob without pressing it first? 5 of 10 KHz?


  12. Hi, i did not recieve a programming cable with my AT-6666, doe the AT-5555 cable work on the AT-6666 ? doe anyone know?

    • Programming cable of AT5555 fits direct to board on the 6666 and works without any troubles at all. No issues.. The drivers with the software work on vista, windows 7 and I use windows 8.1 and all worked fine.

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  14. Hello!

    Recently I bought a CRT SuperStar 9900 which (I think) it is the twin brother of the AnyTone AT-6666.
    I saw some videos on Youtube, and it was really helpful
    I’d like to ask you all about the frequency changing in this radios.
    I saw a big difference between the Anytone and my CRT, when I “dial” the frequency on the Dial Button (or in the microphone buttons).
    In the Anytone case it has no delays when changing between the frequencies. My CRT 9900 looks like it mutes when I change frequency with the microphone buttons. I have to stop presssing the up/down buttons and wait to listen because the receiving is not continuous. The same happens when working with the Dial Button. If I run it too fast, I stop hearing and have to wait a half second to have sound again.
    Does anybody have any idea of what can it be, or how to solve this and make it work like the Anytone AT-6666?

    Many thanks in advance and my best 73!

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