I ordered a dna based DNA-30 Tube since they finally came out in a tube form factor. It was in haste a bit as I didn't relalize I con't turn down the power with it. I think a freshly charged battery comes off at 4.7V. I mainly just use aerotanks. I wanted something with better voltage reg than a buzzy SVD and less expensive than a provari but now I am having second thoughts. On a fresh battery the lowest a can go is 11 watts. Maybe I should have stuck with kicks cause I find 11 watts burns the juice in the aero tank with a 2 ohm coil. I don't get sub ohming at all, seems like fried grease would be the result. How am I wrong about this?
Concerned about not being able to turn down power
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Fresh batteries are at 4.2V, not 4.7. That's 8.8 watts on a fresh battery for a 2ohms coil (won't stay fresh long either).
If that's a problem you'll need higher ohms coils.
Seems the minimum wattage of the dna30 is 7 watts but yeah with a full battery and a 2 ohm coil it'll be more.
I'm not sure other vv devices are very different in that regard btw. Chinese like the svds, vamos etc won't tell you but they do depend on the battery charge . The provari can do it but that's the only one I know of.
Sub ohming and high watts work because people are not using clearos but rebuildables at those wattages, those can withstand 30+ watts without burning the coil and juice. A clearo will burn the juice and wick then probably die fast above 9 or 10 watts max, mainly because it can't wick fast enough.
If that's a problem you'll need higher ohms coils.
Seems the minimum wattage of the dna30 is 7 watts but yeah with a full battery and a 2 ohm coil it'll be more.
I'm not sure other vv devices are very different in that regard btw. Chinese like the svds, vamos etc won't tell you but they do depend on the battery charge . The provari can do it but that's the only one I know of.
Sub ohming and high watts work because people are not using clearos but rebuildables at those wattages, those can withstand 30+ watts without burning the coil and juice. A clearo will burn the juice and wick then probably die fast above 9 or 10 watts max, mainly because it can't wick fast enough.
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The DNA30 won't give you full range on a fresh battery with anything below 2ish ohms. Try a 2 ohm or higher coil in your Aerotank, 2 ohms at 8 watts will be 4 volts which should be a pretty good vape on an Aerotank.
I have a DNA30 and clearos are not the best match for them. A ProTank2 set to 9w on a VTR works great, but on my DNA30 it tastes burnt. I think RBAs are the way to go with a DNA30.
The higher power mods do not do low power. Most of them bottom out at a quoted 7W. But since the problem is that they can't drop the battery voltage, it will be higher with a fresh battery.
With a single coil RBA, I'm up around 9.5-10W, and with a double coil I can nearly double that. But the single coil Kangers are recommended to be used at about 5.5-6W, and I find that about right. The Protank/Aerotank type of products don't wick fast enough to cope with the minimum power that the DNA delivers. The DNA chips just aren't designed to drive them.
Do you find the SVD buzzes? I only ever heard it when driving a genesis atomiser. If you want DC power, then it's an MVP2. If 800Hz is good enough, then it's a Provari.
With a single coil RBA, I'm up around 9.5-10W, and with a double coil I can nearly double that. But the single coil Kangers are recommended to be used at about 5.5-6W, and I find that about right. The Protank/Aerotank type of products don't wick fast enough to cope with the minimum power that the DNA delivers. The DNA chips just aren't designed to drive them.
Do you find the SVD buzzes? I only ever heard it when driving a genesis atomiser. If you want DC power, then it's an MVP2. If 800Hz is good enough, then it's a Provari.
I am catching the Kaylight bug, but I run them around 9 watts. I guess I could just build longer coils, but that's a wicking issue.
I'm exaggerating, if you've ever experienced the smooth vape of a provari you would get the joke.
What about the SX chip used in the Sigelei , where does it stop controlling low voltage?
If you are purely a clearo user and have no intention of using rebuildables then the best aspects of a dna chip will be lost on you, and as you can probably tell it actually may be more limiting to you compared to a provari or the like
According to PBusardo, the SX350 controls down to 5W.
https://www.youtube.com/watch?v=ARcoviGKT5A&list=UUc345z36sFqyC1BheWmW_Iw
https://www.youtube.com/watch?v=ARcoviGKT5A&list=UUc345z36sFqyC1BheWmW_Iw
Which tube device do you have? A DNA30 has a wattage range of 7 to 30 watts. If you can't get below 11 watts then you might want to contact the place where you got the device. You may have a defective device or the device doesn't have a true DNA30 chipset in it (as an example the Tobeco DNA 30 18650 Mod is a china mod which doesn't have a true DNA30 chip in it). Dna30's work very well with non-rebuildable toppers and a 2.0 ohm aerotank should work just fine.
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Its a tobeco, they advertise 7 watts but that's only if you have a high ohm coil so its a white lie. The device (SX300) won't down regulate. That means no lower than battery voltage, you need to study ohms law. It works great for drippers I have 2 of them and that's their niche', they are great for that. But not a fruit blend with an aerotank.
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The SX350 is the only of the series which downregulates, mine is a sx300 and they go no lower than battery voltage. Google ohms Law.
I use ohm's law daily... maybe you misunderstood what I was saying.... the device should regulate from 7 watts to 30 ( using the proper ohm topper to allow it to regulate within the specs of the chip). The tobeco has a china chip and not a true dna30. A 2.0 ohm areotank at 8.7 watts should produce 4.17 volts which is within specs for a true DNA30 and should be regulating. So it may be that the tobaco is not designed to regulate below 11 watts with a 2.0 ohm coil thus giving you battery voltage...
The spec's for a true DNA30 shows a voltage output range of 4 to 8.3 volts. What is the voltage output spec for the tobeca?
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Actually I was adding a correction to something I had said earlier:
The Tobeco can't get down to 5.5-6W, nor can most of the other SX and DNA devices. But the SX350 can. It's an expensive fix, but it is a fix.
I repeat the SX300 can't downregulate. A fresh battery comes off higher than 4.2. The device is just like a mechanical with a fresh battery. Take a voltage reading of a fresh battery, now do the math again.
Battery inputs to the chip... the chip does the work so the specs of the chip dictate the output and regulation... Read about buck circuits and boost circuits and buck/boost circuits for a better understanding.. if your batteries are coming off at 4.7 volts as you stated you also should read about battery safety and proper charging specs for a 18650 battery...
Interesting app.... http://www.steam-engine.org/
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This is where some people fail to do their homework , they just buy on what's popular . I got a DNA 30 clone and prefer my MVP for Pro Tanks , I Clears , Aerotank's etc...
DNA 30 is much better for dripper's and other higher wattage applications but imo most people who vape still prefer standard Clearos and tanks that DO NOT require high wattage.
4.17V is a pretty good value for a fresh battery under load, especially given that there's electronics between it and the coil.
But let's get theoretical. The maximum voltage a Li-ion battery can be charged to without suffering damage is 4.25V.
4.25^2 = 18.0625. Divide by the resistance. of 2 ohms... 9.03125 watts. That is only 0.3watts higher than retird suggested. The resistance that should cause a DNA chip to output 11W with an ultra-fresh battery, with no internal resistance, is 1.64 ohms.
But with an internal resistance and other losses of 50 milliohms, that 11W will result in a voltage drop. It turns out, after some horrible algebra, that the minimum resistance that can be supplied with 11W is approximately 1.59 ohms. So there is no way a DNA should be limited to driving a 2ohm coil at 11W. 9W maybe, 8.7W maybe, but 11W no.
Google Ohms law.
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