SXmini M Class (TEMP CONTROL)

[Vlad1]

I personally can't hear it unless I put the case of the device right ON my ear. Not close to or next to, I mean RIGHT ON my ear, allowing the vibrations and sounds transfer directly from the case to my old man eardrums.


Sent from my iPhone using Tapatalk

Yea it's definitely hard to hear but it's there. I did more testing just a few min. ago. I wanted to try to isolate the sound as much as I could so I chose to set my temp at 580 so not to engage temperature limiting. Put a watered down wick into the coil @ .23Ω and started hitting the fire button. The sound is consistent regardless if temp limit is engaged or not and was present as soon as fire button was pressed. On the scope there's a couple things that were constant and that's 49.6 Hz in every test and a duty cycle of 92.6% when in temp limiting mode I only tested a few lower ranges since the sound was persistent and higher setting was making it harder to keep from engaging temp limiting. A couple tests on power mode as well and that was pretty flat dc. Remember cheap usb pc scope. take with a grain of salt but I think I know what' s making it.

Joule mode
5J
49.67hz at
1.49 Vrms
92.6% duty cycle

10J
49.67hz
2.2 Vrms
92.6% duty cycle

15j
49.67hz
2.9 Vrms
92.6% duty cycle

20j
49.68hz
3.24 Vrms
92.6% duty cycle

Power Mode
5w
1.03Ω
2.32 vrms

10w
1.03Ω
3.29 vrms

15w
1.03Ω
4.02 vrms

20w
1.03Ω
4.66 vrms

 

[Braddahbill]

I personally can't hear it unless I put the case of the device right ON my ear. Not close to or next to, I mean RIGHT ON my ear, allowing the vibrations and sounds transfer directly from the case to my old man eardrums.

I hear it too now.

Last night I made a Twisted NI 200 - 28AWG - 10 wrap - 3mm ID - 0.087Ω coil - 24J - 420º, it takes a couple of seconds for the Lemo 2 to ramp up and while the Lemo 2 is quite I can hear a soft buzz.

 

[retird]

Vlad1.... can ya run the joules up to 50 and scope it there? Noise any more pronounced?

 

[a tez]

send it back if it is a concern.

mine makes a hum as well but like DAM718 mentions, only if it's on my ear.

I emailed Yihi so I'm waiting for an explanation. I'm not too concerned since others hear it as well. I have great hearing so maybe that is why I can hear it further away.

 

[jimho]

I don't agree but I don't want to discuss it either. Joules has embedded time so the op got it right.

Regards
Tony

Sent from my keyboard through my phone or something like that.

Correct, that there is a time component to Joules (m² kg s⁻²) ... so what?

According to SI Watts is by definition Joules over time.
- see table 3 on p http://physics.nist.gov/Pubs/SP330/sp330.pdf
Watts is right there in the middle of the page expressed as J/s.

Sorry but you don't get disagree with SI's definition

 

[a tez]

I just put my Subtank Mini on and I barely hear it with a wick and not pulling. I think I can hear it so easily with the Lemo 2 is because it is much quieter. As soon as I fire my Subtank Mini with RBA the coil vaping the juice is much louder.

 

[jhawk]

Here's what you do if the little buzz bothers you, send it back and go buy you another DNA 40 Ornament.

 

[Vlad1]

Vlad1.... can ya run the joules up to 50 and scope it there? Noise any more pronounced?

Maybe I can try tomorrow. That'll take some work to keep from engaging temp limiting though. My sound testers "kids" aren't available tonight and I cant hear it.

 

[HolmanGT]

You are correct in that a watt is joules divided by seconds. I was stating that a joule is 1watt per second or written another way 1w/s

Actually I believe it is written as 1 Watt x Second. Just the way your power company bills you for Watt x Hours. i.e. Watts multiplied by Time.
Writing it as 1w / s is the mathematical way of saying 1 watt divided by seconds it should be expressed as watts times multiplied by seconds.

One Joule is 1 amp times 1 volt times 1 second.

One Watt is 1 amp times 1 volt.

(there is no time component incorporated in a Watt) So unless you make some abstract assumption the term 1 watt doesn't mean much. You can apply one watt for 1 millisecond which is not going to do very much work or you can apply 1 watt for a second which will do 1000 times more work than when it is applied for 1 millisecond. That said 1 watt second for the way we use energy is not very practical and that is why the Power Companies charge you by the Watt hour or Kilowatt hour both of which could be expressed in Joules by simple multiplying the value 1 joule by the time in seconds the work is performed. 1 watt minute would be equal to 60 joules.

For general use when it comes to the SXmini (SX350J) chip set you can simply think of the set point in Joules as watts used for as long as you hold the fire button. But your battery like the Power Company is sensitive to how long you hold the button down. The longer the button is held down the more work the battery has to supply to the coil whether you call it Joules or watt seconds.

 

[a tez]

Here's what you do if the little buzz bothers you, send it back and go buy you another DNA 40 Ornament.

Heh. No need to bash the DNA 40 here. I already have 2 of them. I don't need a third.

 

[jhawk]

HEHE, I wasn't really bashing it, just alot of complaints abut the little buzz. lol

 

[a tez]

HEHE, I wasn't really bashing it, just alot of complaints abut the little buzz. lol

I personally don't mind the buzz, I was just more concerned about it if mine was the only one. It can buzz all it wants, the SX Mini is excellent.

 

[tchavei]

Correct, that there is a time component to Joules (m² kg s⁻²) ... so what?

According to SI Watts is by definition Joules over time.
- see table 3 on p http://physics.nist.gov/Pubs/SP330/sp330.pdf
Watts is right there in the middle of the page expressed as J/s.

Sorry but you don't get disagree with SI's definition

I'm not disagreeing with SI. I'm disagreeing with your interpretation of it.

You're interpretating j/s as "joules per second" and not as "joules divided by seconds" which is the correct SI way.

I said I didn't want to discuss this.

Regards
Tony


Sent from my keyboard through my phone or something like that.

 

[dam718]

The buzzing doesn't bother me if it's normal fare for the SX350J chipset. It bothers me if some are buzzing and others are not. The the question is, which have the problem? The ones that buzz? Or the ones that are silent?


Sent from my iPhone using Tapatalk

 

[dems86]

The buzzing doesn't bother me if it's normal fare for the SX350J chipset. It bothers me if some are buzzing and others are not. The the question is, which have the problem? The ones that buzz? Or the ones that are silent?


Sent from my iPhone using Tapatalk

I could totally see Busardo just not being and to hear it, especially with the mention of some people needing to listen for it, and others still can't heart it but their kids can. Maybe it's at a certain frequency where not everyone will actually hear it depending on the number of concerts they've been to or how they listen to music throughout the course of their life

 

[TheotherSteveS]

what buzzing.....???? eh? what??

Seriously I cant hear anything at all..

(ok I'll stop now)

 

[Firecrow]

I don't get any buzz but then again, I rarely go over 16W. It could be a component issue with a certain percentage of them. Anything that regulates power has the potential to buzz. Could be as simple as a cold solder joint somewhere on the board or a defective regulation component. Defective enough to buzz but not so defective as to not work.

 

[TheotherSteveS]

for various reasons I wont bore you with I have had the thing at 30W...oops Joules/sec ro is it Joules...and still no buzz so no idea what is going on here. Is it atty dependent - some resonant frequency with some setups??

 

[a tez]

I don't get any buzz but then again, I rarely go over 16W. It could be a component issue with a certain percentage of them. Anything that regulates power has the potential to buzz. Could be as simple as a cold solder joint somewhere on the board or a defective regulation component. Defective enough to buzz but not so defective as to not work.

Buzzing only happens in TC mode for me and others are reporting the same thing. No buzz in Power mode. Did you try it in TC mode or did you mean 16J?

 

[ahgnus]

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.

[/URL][/IMG]

[/URL][/IMG]