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Anytone 6666

I have one too, and it works great for me. The only thing I'm not crazy about is that you can't do channel steps while being able to see the freq you're on. I have a new Lincoln II+ that I'm probably going to put in my truck to replace the quad 6, primarily for that reason.
I just got a Lincoln 2+ from Bob's cb, it is a great radio and the features are better laid out on the front of the radio.
 
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I have a 6666 and it is a great rig, transmit sounds real clean. The receive has too much hiss to listen to comfortably. This radio was out of the box, so maybe an alignment would help. Or maybe there is a way to do the alignment so you end up with less noise, I am not sure.
I have had bad luck with 2, this what I get ordering from Amazon. Going through a Anytone or retailers now. I love the rig,I got great reports,as now it stopped transmitting,aa I thing the final are gone. SWR .1 to 1.1,set middle at 28.000MHz, then around 30,000MHz,it's at 2.1. Git me, bad luck, and running no bandaid, good enough for me.Have a good one.
 
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This is an Opinion, for the last time I posted anything about the AT-6666 I got jumped on...

The Finals for that thing - are MOSFET's - you can use two types - IRF520 and FQP13N10 - both will work - the 13's are more "powered" than the IRF520 - but the IRF520 - if biased correctly will show to be more robust - just not a peaking in power like the 13's counterpart.

Which brings up this thread...
https://www.worldwidedx.com/threads/how-bulletproof-is-the-13n10-power-mosfet.262875/

It got ugly near the end, but it seemed to "flush out" ok...

But that thread has important details that can be applied to your condition - you also deserve better answers.

Again, what was raised in the thread still needs to be addressed in ANY radio with Blown Finals - has it been messed with?

You said you got the radio from Amazon? They do have a return policy - has the length of time expired?

IF so, then sorry to see this turn out bad for you.

A Factory is only a good at the products they make and will stand behind - sometimes, the products are not the same as claimed on the side of the box it came in. They may use different parts, or someone's had to refurbish the radio using other parts that do not perform as well so the Finals are tweaked to obtain the same levels of performance and in the case on what is to be seen below - not sure if the radio is refurbed or otherwise, not OEM. Or, if it was OEM - they did use a different part? Then if that is - so, what some claim is being done is showing up on our shores.

But that doesn't mean the radio can't be fixed, you just have to bear the brunt of a repair that could make or break the desire to own a piece of equipment such as this, that people some like - others can't and some just don't understand.

A bad SWR can kill radios - period, no matter the amount of protection the factory can claim it can withstand.

So, I do know that Amazon's policies are for the customer, but it doesn't have regulations in place like you'd see in retailer settings - store fronts. I'm referring to someone buying something - didn't like it, and then returns it to buy elsewhere - approach. What does the manager then do with the stuff then? Well, they have to return it to show just-cause to refund back the cost of the refund back to the store but if it's been abused, then all the costs go back to the retailer for settlement.

So, what I'm getting at here are some radios enter into your hands looking like they're brand new but only gently refurbed because the previous owner didn't want or couldn't utilize the radio like they wanted it to be. Then the condition of the power cords, mike handset and all other handprints and fingerprints washed off and a fresh silica-packet to keep it dry is thrown in as a air freshener - the radio is re-boxed and resold - because there's enough evidence to show nothing is wrong with it and warranty - (IF ANY) - can be honored as long as they screws are - this way, and the case is - that way and the power cord looks like what is over there...

  • you don't have the luxury of knowing whom else worked, used or tuned the radio before you got it, so if something was set one way originally - then tweaked to another extent, the radio is already doomed. It' is only a matter of time.

Now before anyone jumps me again, I used to work sales so don't tell me something I don't already know nor, am I blaming anyone else for an issue that if checked out beforehand - could have been avoided and two threads would have had a vastly different outcome.

You had an SWR of 2:1 - so in most radios they would have survived for quite a while - it's only like - in ohmic values 50Ω to 100Ω or 50Ω to 25Ω type of an appearance - they are mirrors of each other - but you're not losing a lot in the process as far as loading - so the radio should have survived that.

It's when mods get thrown in does the imbalance the antenna is to the system - does the mismatch and blown somethingorother shows and rears its ugly head.

But then, why does the SWR blow up the finals?

Simple - any radio engineer will tell you the radio, any radio - can withstand some high voltage reflections (Your V in the VSWR) - it has to - in order to even produce any power into a load - for every load is not pure resistive - they know that. But the variable is the reactive component and the parts claimed to be used...



Ok, someone else learned the same lessons I did a long time ago. Ok, so the IRF-520 is not as robust as the 13N10? Wow, ok, let's look further...

How's the Bias? 50 mA or something more like 70mA - HOLD IT RIGHT THERE?!!!

Why even above 35mA? Well, it is an SSB radio it needs to have the Drain to Source "leak" a few drops, not a gusher, MUCH less than that. A stream? No, nor even a trickle, just a little - so if it's biased to turn on and "leak" current as a trickle or above, all the time? Yep - your darn tootin' it's going to heat up the part and on top of that make it meets the rated equilibrium sooner in the power curve than it should.

As part of the job, I had to investigate the reasons for the return/repair. One of the main reasons was the Bias was not set properly - I just had to show evidence the Bias was off to get a claim made - for or against the customer - that was not my decision - it was the bosses, and he stood by their shops work, but needed proof if the radio he sold was truly out of spec or the customer got something done to it - we had to prove our side beyond doubts. It was one of the many reasons why I was even allowed to work there - my ability to fish out detail's others couldn't.

upload_2021-12-2_8-51-47.png
There are details above that never got discussed earlier...
I gave them color to help stand out so others could see...​

So, to him, an Anytone AT-6666 and the SWR issue - made him money - because he believed in the product. IF something wasn't right - he based his profits on the betting that the radio would pay off a good return - doesn't mean that it was always good, just the radio was durable enough to be profitable and last beyond the return policy - that's all he wanted. Many people would buy something and use it, then if they didn't like it, they'd sell it off or if it blew up - hey, nice paperweight moment for someone else's doorstop. The boss makes money on ignorance too...

So, I'm just posting the above to let it sink in for a moment - so while people may read the thread and skip on well that is ok, but there's a few nuggets of information that you'd pass by if you don't ask the right questions or even accept the answers others give - because the proof of their (ANYTONE) claim is in the above.
 

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  • upload_2021-12-2_8-51-31.png
    upload_2021-12-2_8-51-31.png
    498.6 KB · Views: 21
This is an Opinion, for the last time I posted anything about the AT-6666 I got jumped on...

The Finals for that thing - are MOSFET's - you can use two types - IRF520 and FQP13N10 - both will work - the 13's are more "powered" than the IRF520 - but the IRF520 - if biased correctly will show to be more robust - just not a peaking in power like the 13's counterpart.
I am totally speechless, I may have to read this again, but thanks for the info. I have a new Tramm Antenna,nall new quality Coax,on a grounded tower, and have never rana Amp through any of my radios. I do take care of all my equipment, nothing get used unless SWR is at 2.1.If they are high on the uppers, I stay off, I also have a 10 through 160, I may be wrong on the 160, my son is hooked to that for SW, and a tuner for incoming signals. I have one question, what would be a reliable ALL BAND, possible Antenna Tuner built in,or a VHF, UHF Rig. Any ideas? Thanks for the info.
Which brings up this thread...
https://www.worldwidedx.com/threads/how-bulletproof-is-the-13n10-power-mosfet.262875/

It got ugly near the end, but it seemed to "flush out" ok...

But that thread has important details that can be applied to your condition - you also deserve better answers.

Again, what was raised in the thread still needs to be addressed in ANY radio with Blown Finals - has it been messed with?

You said you got the radio from Amazon? They do have a return policy - has the length of time expired?

IF so, then sorry to see this turn out bad for you.

A Factory is only a good at the products they make and will stand behind - sometimes, the products are not the same as claimed on the side of the box it came in. They may use different parts, or someone's had to refurbish the radio using other parts that do not perform as well so the Finals are tweaked to obtain the same levels of performance and in the case on what is to be seen below - not sure if the radio is refurbed or otherwise, not OEM. Or, if it was OEM - they did use a different part? Then if that is - so, what some claim is being done is showing up on our shores.

But that doesn't mean the radio can't be fixed, you just have to bear the brunt of a repair that could make or break the desire to own a piece of equipment such as this, that people some like - others can't and some just don't understand.

A bad SWR can kill radios - period, no matter the amount of protection the factory can claim it can withstand.

So, I do know that Amazon's policies are for the customer, but it doesn't have regulations in place like you'd see in retailer settings - store fronts. I'm referring to someone buying something - didn't like it, and then returns it to buy elsewhere - approach. What does the manager then do with the stuff then? Well, they have to return it to show just-cause to refund back the cost of the refund back to the store but if it's been abused, then all the costs go back to the retailer for settlement.

So, what I'm getting at here are some radios enter into your hands looking like they're brand new but only gently refurbed because the previous owner didn't want or couldn't utilize the radio like they wanted it to be. Then the condition of the power cords, mike handset and all other handprints and fingerprints washed off and a fresh silica-packet to keep it dry is thrown in as a air freshener - the radio is re-boxed and resold - because there's enough evidence to show nothing is wrong with it and warranty - (IF ANY) - can be honored as long as they screws are - this way, and the case is - that way and the power cord looks like what is over there...

  • you don't have the luxury of knowing whom else worked, used or tuned the radio before you got it, so if something was set one way originally - then tweaked to another extent, the radio is already doomed. It' is only a matter of time.

Now before anyone jumps me again, I used to work sales so don't tell me something I don't already know nor, am I blaming anyone else for an issue that if checked out beforehand - could have been avoided and two threads would have had a vastly different outcome.

You had an SWR of 2:1 - so in most radios they would have survived for quite a while - it's only like - in ohmic values 50Ω to 100Ω or 50Ω to 25Ω type of an appearance - they are mirrors of each other - but you're not losing a lot in the process as far as loading - so the radio should have survived that.

It's when mods get thrown in does the imbalance the antenna is to the system - does the mismatch and blown somethingorother shows and rears its ugly head.

But then, why does the SWR blow up the finals?

Simple - any radio engineer will tell you the radio, any radio - can withstand some high voltage reflections (Your V in the VSWR) - it has to - in order to even produce any power into a load - for every load is not pure resistive - they know that. But the variable is the reactive component and the parts claimed to be used...



Ok, someone else learned the same lessons I did a long time ago. Ok, so the IRF-520 is not as robust as the 13N10? Wow, ok, let's look further...

How's the Bias? 50 mA or something more like 70mA - HOLD IT RIGHT THERE?!!!

Why even above 35mA? Well, it is an SSB radio it needs to have the Drain to Source "leak" a few drops, not a gusher, MUCH less than that. A stream? No, nor even a trickle, just a little - so if it's biased to turn on and "leak" current as a trickle or above, all the time? Yep - your darn tootin' it's going to heat up the part and on top of that make it meets the rated equilibrium sooner in the power curve than it should.

As part of the job, I had to investigate the reasons for the return/repair. One of the main reasons was the Bias was not set properly - I just had to show evidence the Bias was off to get a claim made - for or against the customer - that was not my decision - it was the bosses, and he stood by their shops work, but needed proof if the radio he sold was truly out of spec or the customer got something done to it - we had to prove our side beyond doubts. It was one of the many reasons why I was even allowed to work there - my ability to fish out detail's others couldn't.

View attachment 48771
There are details above that never got discussed earlier...
I gave them color to help stand out so others could see...​

So, to him, an Anytone AT-6666 and the SWR issue - made him money - because he believed in the product. IF something wasn't right - he based his profits on the betting that the radio would pay off a good return - doesn't mean that it was always good, just the radio was durable enough to be profitable and last beyond the return policy - that's all he wanted. Many people would buy something and use it, then if they didn't like it, they'd sell it off or if it blew up - hey, nice paperweight moment for someone else's doorstop. The boss makes money on ignorance too...

So, I'm just posting the above to let it sink in for a moment - so while people may read the thread and skip on well that is ok, but there's a few nuggets of information that you'd pass by if you don't ask the right questions or even accept the answers others give - because the proof of their (ANYTONE) claim is in the above.
 

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