Which ohm for TC?

[HondaDavidson]

My mod will fire in TC from .05ohm to 1.5ohm... so before I spend hours building coils to figure out. Which end of the scale should work better lower ohm or Higher?

The mod is a pico75. And I tend to prefer vaping at below 25 watts.
Running Avocado with a .4 ohm 3x30 SS coil in TC firing at 17 watts and 195c.

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[DevAuto]

My mod will fire in TC from .05ohm to 1.5ohm... so before I spend hours building coils to figure out. Which end of the scale should work better lower ohm or Higher?

The mod is a pico75. And I tend to prefer vaping at below 25 watts.
Running Avocado with a .4 ohm 3x30 SS coil in TC firing at 17 watts and 195c.

Sent from my SCH-I605 using Tapatalk

In TC mode it doesn't really matter what your final ohms are as long as it's within the TC mode range for your mod. Ultimately, 195c is still 195c whether it's on a .15 or a .50 ohm coil. Where it might make a difference is in the number of wraps in the coil, in theory, the more wraps, the more surface area, the better the flavor and vapor. In reality, I'm quite happy with the flavor and vapor that comes out of my 2.5mm, 4 wrap, .31 ohm coil.

 

[HondaDavidson]

I wasn't asking about the coil or vaping production.... I was asking about function.... does the mod function electrically better at one end of the scale vs the other. Will it regulate better at higher voltage or lower voltage outputs. Is it going to function more accurately.

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[Markw4mms]

As long as your coils fall within the firing range it shouldn't matter, it will regulate the same either way.

 

[HondaDavidson]

As long as your coils fall within the firing range it shouldn't matter, it will regulate the same either way.

No mod is 100 percent efficient. They do not regulate the same throughout a range.... there is variability added to the regulation just based on the metal goal properties of the coil and power capabilities if the battery. Both of which change under load.

My Jeep can drive at 0 to a bit over 100mph..... but it performs best at below 25 mph and most efficiently at around 55.
My stereo has 0 to 75 on the volume control...... but performs best in the middle of the scale.

There's always sweet spot for functionality.

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[conanthewarrior]

My mod will fire in TC from .05ohm to 1.5ohm... so before I spend hours building coils to figure out. Which end of the scale should work better lower ohm or Higher?

The mod is a pico75. And I tend to prefer vaping at below 25 watts.
Running Avocado with a .4 ohm 3x30 SS coil in TC firing at 17 watts and 195c.

Sent from my SCH-I605 using Tapatalk

I would say with that mod, and the wire type you use, stick with builds above 0.3-4 for TC to work best.

Where SS has less of an increase in resistance to other wire types used for TC, it can be a bit funky at lower resistances unless you are using a very good board, like a DNA200 or similar. I find with those my preference is 0.25 26G duals, 2.5MM ID.

I find this does work well on other mods though, even the Pico, but most people recommend slightly higher builds for SS TC.

 

[conanthewarrior]

I wasn't asking about the coil or vaping production.... I was asking about function.... does the mod function electrically better at one end of the scale vs the other. Will it regulate better at higher voltage or lower voltage outputs. Is it going to function more accurately.

Sent from my SCH-I605 using Tapatalk

Ahh, I see now what you mean.

If you went to the higher end of the spectrum, at 1.5 Ohms on that mod, it would be boosting a lot to achieve 25W- this is much more inefficient than bucking voltage.

Around 0.7 is where voltage is bucked assuming a 4.2V battery- but as we know batteries sag, I would say 0.6 is around where things get more efficient. Even then, as input voltage falls, it will still have to boost though, so I think between 0.3-0.4 would be best assuming 25W, including losses from the board.

 

[HondaDavidson]

Ahh, I see now what you mean.

If you went to the higher end of the spectrum, at 1.5 Ohms on that mod, it would be boosting a lot to achieve 25W- this is much more inefficient than bucking voltage.

Around 0.7 is where voltage is bucked assuming a 4.2V battery- but as we know batteries sag, I would say 0.6 is around where things get more efficient. Even then, as input voltage falls, it will still have to boost though, so I think between 0.3-0.4 would be best assuming 25W, including losses from the board.

That answers my other question...... re buck vs boost.

25 watts is about the max I vape at...... I also have Arcticfox installed. In VW mode I run with a wattage set between 15 and 18. Power curve is decending from 150% down to 90%, with 100% comming At 2 second. Most of the time I target builds to that setting and a Heat Flux of 150 to 200 at 15watts.

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[ShowerHead]

I've always thought that having as high a resistance I can get with a particular metal will give a greater range for the TC to use.
Since TCR is that same no matter the gauge or length it would seem easier for the chip to detect 1/100th of .5 than 1/100th of .15
I guess it would depend on how accurate the chip can measure the resistance. If it had great resolution, it could 'see' the smaller changes. If it had average resolution, it would miss smaller changes and have to wait for a larger change.
I think TCR of the wire has more to do with accuracy of TC.
It's why I use SS430 (0.00138) and NiFe52 (0.00405) instead of SS316 (0.000915)