SXmini M Class (TEMP CONTROL)

[dam718]

True enough, even with the audible buzz the thing still performs flawless. And that's what really matters

I think it was Vlad1 who posted some prelim scope readings, and you can SEE the sound. It's like a baseline constant blip across the bottom of the reading. And at a set frequency. I assume it's something used for timing, which would make sense. Not sure what the purpose of the electrical pulse is though, as they could have achieved timing via a crystal oscillator without actually putting any voltage at all across the 510 connection.

Oh well...

For the record, I hope all this buzzing nonsense isn't scaring anyone from buying this device. I'm just letting the electrical engineer side of me take over instead of just enjoying the vape experience. This is still an incredible device, and well worth the purchase price!

 

[MsLoud]

Funny thing....I rebuilt to 28g 2.5 on the coil master, 12 wraps (I think I counted correctly LOL) at 0.11 and OMG i didnt think this could get any better but seems to me staying around 0.1 is my sweet spot. 20J, 400 degrees

 

[JimScotty0]

Hello All,

Long time lurker here. I've been using my SXmini M-class for about 2 weeks now. I thought I had found the ultimate mod when I got SXmini S-class, but I was wrong. M-class blew my mind with its finish quality and tons of features. Best vape investment to date!!

Today I tried my first dual coil setup at 0.08 ohms, and it is vaping beautifully in my Big Buddha at 35J/Powerful+/450F. Zero dry hits and mouthful of smooth warm vape. It was such a breeze to work on BB since it has a huge deck and many trapping options. Sure it looks a bit top heavy, but the weight is very well balanced since M-class is a heavier mod.

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A work of art! Nicely done!

 

[Firecrow]

For those that have the buzz, I would just exercise the warranty and be done with it. The fact that there are those of us without the buzz would indicate to me there is a problem with the units that do.

 

[HolmanGT]

So - I finally made it home from work to play with my new SX (loves my hubby!)

First attempt at coil - 28g Ni200, 0.09ohm (is that good?) I didnt take the time to care - threw it on the SX, set the resistance and all the settings - 18J, 380 temp. This SX is blowing my mind. On my AVD I have more depth in flavor I have not experienced before.

No humming but my adrenaline is still running high from speeding all the way home...now off to enjoy the night!

MsLoud,

0.09 ohms is great the ultimate according to YiHi is 0.065 ohms I run around 0.15 ohms 25 J 425 temp limit. on a Lemo 2

PS - want to rent you hubby out for next Valentines Day -

 

[JimScotty0]

Alright, I got a dropbox account just to upload this silly audio file...

This is unedited, exactly as I sent it to Phil... So if your name isn't Phil, disregard the beginning

With a good set of headphones, I can certainly hear the buzzing, as well as the hissing if the coil. This was with my iPhone mic resting right against the side of the SXmini case.

Dropbox - SXmini M Class Buzzing MP3

That is exactly the sound I am hearing but only if I place it close to my ear. Probably would have never noticed it if it wasn't pointed out. What was your joules setting when you recorded it?

 

[dam718]

That is exactly the sound I am hearing but only if I place it close to my ear. Probably would have never noticed it if it wasn't pointed out. What was your joules setting when you recorded it?

Pretty sure I recorded that with the Subtank Mini + RBA. I would have been at 18J with that setup.

 

[Yozhik]

With a good set of headphones, I can certainly hear the buzzing, as well as the hissing if the coil. This was with my iPhone mic resting right against the side of the SXmini case.

Dropbox - SXmini M Class Buzzing MP3

I can hear that sound if I put my ear against the device. It's likely just coil noise, which can arise when cycling substantial power through an inductor.

 

[Yozhik]

I didn't start noticing the buzz in TC mode until I read about it here and now I can't stop hearing it

Anyways, I've been using my M class for a week now and it's been great. I still don't understand the nuances of TC though. I can't even tell the difference between 230 degrees and 420 degrees F. I never hit the cutoff temperature I set and I sometimes get dry hits. They aren't "I WANT TO DIE" dry hits of burnt cotton, just dry hits where I think liquid hasn't wicked properly. I guess that could be a product of me chain vaping more and/or the thickness of the liquid since I'm using a Billow. I have noticed that I've been going through liquid like crazy since I sold all my other mods and switched exclusively to this device.

Check to make sure all your connections are very tight, as TC can be unforgiving otherwise. With the Kanger subtank, I really had to tighten things down a lot more than I did with Kanthal to make it work right.

 

[HolmanGT]

Funny thing....I rebuilt to 28g 2.5 on the coil master, 12 wraps (I think I counted correctly LOL) at 0.11 and OMG i didnt think this could get any better but seems to me staying around 0.1 is my sweet spot. 20J, 400 degrees

i'll bet your hubby gets tired of giving gifts that are just not appreciated.

 

[derogg]

I think it was mentioned before but when you change temp settings there is a temperature displayed when you exit back to the main screen. Is that the temperature achieved by the coil at the previous setting?
-Dirk

 

[JimScotty0]

I can hear that sound if I put my ear against the device. It's likely just coil noise, which can arise when cycling substantial power through an inductor.

Well some of us hear it and some of us don't. I don't think it is a problem for anybody since even if you should be able to hear it that it is not a problem with the device. We all for the most part seem to be liking the device and that very minor hum sound causes no performance issues. We all did our due diligence investigating and exploring if there is an issue or not. So don't you think now that we have established this it is time to move on?

 

[a tez]

For those that have the buzz, I would just exercise the warranty and be done with it. The fact that there are those of us without the buzz would indicate to me there is a problem with the units that do.

I contacted YiHi yesterday and haven't heard anything from them as of yet. I also contacted Vspot Vapes (the site I bought my M Class from) today and hope to hear from them. I don't know if they know anything about it or handle the issue themselves or if it is a legitimate problem and I'm going to have to send it to Yihi. The Mini still works perfectly fine so I'd rather not have to send it to China and wait a month to get it back.

I'll wait to hear from YiHi for an official explanation before I think about sending it back.

 

[a tez]

I think it was mentioned before but when you change temp settings there is a temperature displayed when you exit back to the main screen. Is that the temperature achieved by the coil at the previous setting?
-Dirk

I believe it was said that it is the current temp of the coil or the temp the coil was right before the temp was changed.

 

[dam718]

Well some of us hear it and some of us don't. I don't think it is a problem for anybody since even if you should be able to hear it that it is not a problem with the device. We all for the most part seem to be liking the device and that very minor hum sound causes no performance issues. We all did our due diligence investigating and exploring if there is an issue or not. So don't you think now that we have established this it is time to move on?

I don't think we should shelf the subject just yet til we get a definitive answer from YiHi. I think someone had sent them an e-mail regarding the buzz. If they say it's normal, then we move along smartly. If it's not normal, however, we have a lot of people with defective mods in the wild, and that would need to be addressed. At least for now it's certainly looking like this is normal, as there seem to be more people that CAN hear it as opposed to those who can't. Still, I'd rather hear that from the horses mouth.

 

[Yozhik]

Well some of us hear it and some of us don't. I don't think it is a problem for anybody since even if you should be able to hear it that it is not a problem with the device. We all for the most part seem to be liking the device and that very minor hum sound causes no performance issues. We all did our due diligence investigating and exploring if there is an issue or not. So don't you think now that we have established this it is time to move on?

It's typically not a danger. When you cycle power through an inductor, the changing magnetic fields can cause the wires to vibrate. Also, the stronger the power, the louder it can be. This sort of noise can be heard with things like high-end video cards used by gamers, though they tend to call it "coil whine" because the frequencies are much higher.

 

[JimScotty0]

I am finding some good vaping on my Kangertech Subtank Mini today using the prebuilt VaporShark NI200 coils. My resistance is .122 ohms, 14.2 joules, 539 degrees, 2.22 volts when it reaches TC, and running in powerful mode. It takes about 6 seconds to reach TC when taking a cold hit. A quick after that is about 4 seconds. At first I was just vaping in the lower 400 range going up sometimes to about 450 but wasn't getting the flavor to pop out with the higher VG. I just wanted to experiment with the higher temps since I am using about an 95% VG ratio which needs the higher temps. I am now finding a whole new world of flavor at these higher temps and the vape is just very slightly warm and I am digging it. The SX is still very comfortable in the hand and only so slightly warm.

When using a 30/70 PG/VG ratio juice the mid 400's are about right for me. In either case I am finding a better vape flavor using the lower joules settings rather than the 28-32 J I was using for over a week.

 

[retird]

It's typically not a danger. When you cycle power through an inductor, the changing magnetic fields can cause the wires to vibrate. Also, the stronger the power, the louder it can be. This sort of noise can be heard with things like high-end video cards used by gamers, though they tend to call it "coil whine" because the frequencies are much higher.

Just one more thought on the noise and I done talking about it...

I spent a bit of time reviewing the video posted pages ago and found something interesting to me starting at about 10:40 into the video. Reviewer set the device to 50J with a 0.13 ohm coil set to 400F in Standard mode. He talks about the "heartbeat" (pulse noise") in this part of the video. I then went back and stopped the video at the 11 minute point and verified the readings while firing.

It shows 50J, 0.13 ohms, Standard Mode, 4 volts., 400F..and significant sag in the battery meter........... Using ohm's calculator, if my calculations are correct that's 30 amps or 123 watts.... remember the "heartbeat".. he says it is more pronounced at higher joules setting and not as smooth a sound..... I think this is important.... just my 2 cents...does this sound about right or am I off in the weeds....?

Is this the "coil whine" you refer to?

Nite all..... hope ECF gets the conversion done without issue...

 

[patioclark]

I'm three days into this device and it's my first in TC. Varitube got a grey/silver unit out in a hurry and I continue to find them to be a great vendor. So I've tried both 28G and 30G nickel and while it's a little different to work with, it wasn't a big problem. Cleaning my NET juice gunk off the coils instead of burning is not optimal but is okay with really hot water and an old toothbrush. I do find the unit and my Erl get quite a bit hotter than with kanthal. 7-9 wraps, .2 ohm coils, and 15-16J at 385 degrees.

So now I'm trying 30G Ti, 7 wraps, .44 ohms, 290 degrees. It doesn't heat up nearly as much and it's a nice vape but I swear it tastes a little soapy (and I only used alcohol to clean the wire).

I could hear the buzz if I put it close to my ear with the nickel builds, not at all with the Ti????? Can anyone else try this and I don't know if it's relevant but I thought I'd post it.

I do like this device and technology and I'm going to try some new builds including a nickel/kanthal twisted coil.

Thanks everyone for your posts and insights on this thread. Nice stuff.

 

[JimScotty0]

Just one more thought on the noise and I done talking about it...

I spent a bit of time reviewing the video posted pages ago and found something interesting to me starting at about 10:40 into the video. Reviewer set the device to 50J with a 0.13 ohm coil set to 400F in Standard mode. He talks about the "heartbeat" (pulse noise") in this part of the video. I then went back and stopped the video at the 11 minute point and verified the readings while firing.

It shows 50J, 0.13 ohms, Standard Mode, 4 volts., 400F..and significant sag in the battery meter........... Using ohm's calculator, if my calculations are correct that's 30 amps or 123 watts.... remember the "heartbeat".. he says it is more pronounced at higher joules setting and not as smooth a sound..... I think this is important.... just my 2 cents...does this sound about right or am I off in the weeds....?

Is this the "coil whine" you refer to?

Nite all..... hope ECF gets the conversion done without issue...

Retird, I pointed that out last night also but I don't believe anyone commented further. The hum seems to always be there at all joules levels but it is more pronounced at 50J or close to that. What I am concerned about is using such high joules levels and the related 50J pulses will put a heavy stress on a battery. Chain vaping at such high levels may be a safety hazard in my opinion. There will be some of us that may use inferior batteries in this SX mod and may get themselves in trouble.

I am finding more and more that I am liking the joules set between 14-20J for a pleasant vape and not needing or liking the higher settings that I was using just a few days ago on a regular basis. I am sure it is also safer too. JMHO

BTW... I think you may be in the 40 amp range when you are running at 50J.