Russian 91% v2 irratic resistance readings

[Elantis]

Caution/Waring re: FD kayfun Lite Plus rebuilt kit w/ 2 pieces 510 post.

Yikes! It's a never ending story. Just ran into another problem w/ the FD rebuilt kit's post. The threading for the little adjustment screw is terrible. I can basically just push the little screw into the long screw. The threading just doesn't match up. Couldn't figure out why I lost 'connection' of the R91 to my PV, then noticed the adjusment screw was pushed in to far. When trying to unscrew it - it just 'spun' and would not 'screw out'. Crap!

So I took some fine copper wire and wound it around the threads of the little screw. Then with light pressure on the little screw I worked it back into the long post. Not happy at all with the QC of these things. I have 2 of his kits and both have the same problem w/ the screw fit.



FWIW - Fat Daddy did contact me about getting pictures, measurements and/or a center post of the proper size and he would look into getting them made specifically for the R91. We'll see where this goes - but I'll surely be stressing to him that the quality needs to be addressed not just the proper lenght, etc.

I just checked the kit I have and the same problem exists! Now I really hope I don't have a problem with my V2 as I know I don't have any of that copper wire around anywhere

 

[cadman]

I just checked the kit I have and the same problem exists! Now I really hope I don't have a problem with my V2 as I know I don't have any of that copper wire around anywhere

Same for my 2 kits from Fat Daddy, sent email via ebay on Friday and haven't heard back from him yet.

 

[The Ocelot]

I'm not even going to open the RV2 when it arrives. I sent the vendor an email with a copy of the statement on Kebo's fb page. They replied that they would contact Kebo to find out more about it. They shipped it to me the next morning. I have received no notice about what their plan is to resolve the issue. I don't want a new product I may have to fix for it to work correctly.

 

[MikeE3]

Same for my 2 kits from Fat Daddy, sent email via ebay on Friday and haven't heard back from him yet.

I posted to his FB page basically what I posted here along with mentioning other people have the same issue w/ it. Don't know what will or won't come from it - but I feel better now.

 

[magicmyst]

I'm not even going to open the RV2 when it arrives. I sent the vendor an email with a copy of the statement on Kebo's fb page. They replied that they would contact Kebo to find out more about it. They shipped it to me the next morning. I have received no notice about what their plan is to resolve the issue. I don't want a new product I may have to fix for it to work correctly.

Any decent vendor should offer a refund for an unopened, unused item, especially one that has well documented "issues".

 

[The Ocelot]

Any decent vendor should offer a refund for an unopened, unused item, especially one that has well documented "issues".

Especially when the customer is an Ocelot who wanted a new toy. You wanna be my toy Mr. Vendor?

 

[MikeE3]

Posted this info to FD w/ respect to him considering making the right size 510 screws for the R91 with a reminder that the little screw needs to be a good fit to be useable (not like the ones he's selling). Haven't heard back from him about his kit screws being 'screwed up'.

FD-KFL (measurements in inches)
Long Screw
Length = .814
Thickness of head = .036
Hole from top of threads = .580
~length of threads = .200
Short Screw
Length = .195
Thickness of head = .036

R91 Ver 1 (measurements in inches)
Long Screw
Length = .741
Thickness of head = .050
Hole from top of threads = .380
~length of threads = .177
Short Screw
Length = .261
Thickness of head = .050
(also has an o-ring)

 

[carrielsal]

I ordered and had a R91% delivered to friend in australia who bring it to me when he comes next month

The Russian 91% - Electronic Cigarettes - VapingMadElectronic Cigarettes – VapingMad

any idea if this is a V1 or V2? I would hate to have spent all this money and gone through all the trouble for a messed up model :S

The pics are for v1, but the description is also a give away. Adjustable 510 center pin and Drip tip adapter included for all 510 drip tips. The second pic in post 1 has a pic of the center pins. The rba on the left is v1 showing the adjustable center pin, http://www.e-cigarette-forum.com/fo...irratic-resistance-readings.html#post12703181. v1 has the screw in drip tip, but an adapter so you can use a 510 drip tip.
I would ask the retailer to verify that they are sending v1 and not rely on the pics. You do NOT want a v2.

 

[carrielsal]

Mike...thanks for the info. I just got home from a 4 day camping weekend and haven't even checked the mail yet. I need to take a closer look later today at how you got this kit to work. I may be PM'ing you for help.

 

[MikeE3]

Mike...thanks for the info. I just got home from a 4 day camping weekend and haven't even checked the mail yet. I need to take a closer look later today at how you got this kit to work. I may be PM'ing you for help.

No problem re: PMing me. And if you or someone else needs some of the thin copper wire I used to get the adjustment screw to 'hold' pm me a mailing addy and I'll send some.

edit: Wondering where you've been. Thought maybe you were on your way to China to give them a tonque lashing and bring home some V1 510 posts.

 

[Loopy1224]

Noob here doing my first build on a Russian 91 v2. Looks like I have a defective unit to but I do have a question. I build a coil and put it on my ohm meter and I get readings fluctuating from 4.3 to 5.7 ohms but when i screw the build onto my provari it reads a steady 2.1. Anybody know why that would be?

 

[carrielsal]

Noob here doing my first build on a Russian 91 v2. Looks like I have a defective unit to but I do have a question. I build a coil and put it on my ohm meter and I get readings fluctuating from 4.3 to 5.7 ohms but when i screw the build onto my provari it reads a steady 2.1. Anybody know why that would be?

Loopy - That is interesting. Maybe some additional info might help someone here figure it out.
What kind of coil did you build? ie. micro-coil, gauge of kanthal, etc. Did the positive block move when you tightened the screw on top when you installed the coil?
Can you post pics of your build?

 

[Loopy1224]

Plain old micro-coil with 28 gauge kanthal. Pics are aren't great but hear goes. First one is of ohm meter and the second one is of the build.

 

[Loopy1224]

I threw the build on the provari and am not having any issues at all. This is my first rebuildable topper. Now I know what all the fuss is about. Can't even compare the vape to my Nautilus. I the words of Frank Berone "HOLY CRAP".

 

[Weizenheimer]

I seem to have gotten uncharacteristically lucky. I got one of these that seems to be working properly. I don't have an actual multimeter or 510 threaded ohm meter, but my Provari and ZNA both keep reading it the same. The ZNA reads it the same and shows the same output voltage every time I hit the button, and it is definitely vaping like a champ.

 

[MikeE3]

Noob here doing my first build on a Russian 91 v2. Looks like I have a defective unit to but I do have a question. I build a coil and put it on my ohm meter and I get readings fluctuating from 4.3 to 5.7 ohms but when i screw the build onto my provari it reads a steady 2.1. Anybody know why that would be?

I 'think' the V2 is not making a good connection with the 'little black box' ohm tester. I saw the same thing. High reading all over the board on the BB tester but a steady 1.2Ωs on a Provari. You really need a multi-meter tester to check the resistance between the +/- screws holding the coil in place to trust the reading on any PV that reads ohms. See below for more on this.

I seem to have gotten uncharacteristically lucky. I got one of these that seems to be working properly. I don't have an actual multimeter or 510 threaded ohm meter, but my Provari and ZNA both keep reading it the same. The ZNA reads it the same and shows the same output voltage every time I hit the button, and it is definitely vaping like a champ.

I don't want to bust your bubble but just because you're getting a steady reading on the Provari and ZNA you may still have an undetected issue w/ it. Why?

#1 - When I measure the coil's ohms with a DVM between the +/- coil screws I get a .6Ω reading which is about what I expected for the coil build.

#2 - When I measure it screwed to a little black box tester it constantly fluctuates from 1.7 to 5.4 and all kinds of readings in between.

#3 - When I measure it w/ a DVM from the negative coil screw to the floating 510 pin I get reading from 2.7 to .9 depending how far the post it pressed in.

#4 - When I run it on a Provari it reads a consistent 1.2Ωs (and I know for sure it's a .6Ω coil, see #1)

So just because you have a consistant reading from the PV - it may not be the 'real' resistance of the coil. The spring 'adds' resistance depending on it's position. It's vaping fine on the Provari and seems to hold it's 1.2Ω reading - but it's not a 1.2Ω coil.

edit: Don't get me wrong I'm not trying to say 'for sure' yours has a problem. I'm just trying to point out, that unless you know what the coil's ohm really is you can't rule out a problem w/ the V2 just because a PV's ohm reading is consistent/stable.

 

[Loopy1224]

Thanks Mike - I thought it might be too good to be true!! I need some lessons on how to measure the resistance and probably a better tool than the little black box ohm meter. I see a trip to Home Depot in my future.

So are you saying that the Provari is stabilizing the resistance or is it not capable of measuring it properly?

 

[MikeE3]

Thanks Mike - I thought it might be too good to be true!! I need some lessons on how to measure the resistance and probably a better tool than the little black box ohm meter. I see a trip to Home Depot in my future.

So are you saying that the Provari is stabilizing the resistance or is it not capable of measuring it properly?

The Provari isn't 'doing' anything to stabilize or overcome the issue w/ the floating pin. The Provari is just reading the overall resistance of the coil's resistance plus the resistance added by the spring loaded floating pin.

As to the erratic readings from the black box compared to the Provari. I'm at a loss on that. I'm dumb when it comes to circuits and electronics but I'm guessing it has something to do about the way the black box tests the resistance being different than the Provari. The Provari actually fires the coil when it takes the reading. The black box doesn't. So it might have something to do with the way the black box tests resistance that causes it to fluctuate so much w/ the R91V2.

I've never had any other atty show wonky readings on the black box. It's always been a reliable tester for me.

 

[Loopy1224]

Thanks again. Guess i will have to take this matter up with Vapor DNA


Sent from my iPhone using Tapatalk

 

[carrielsal]

I posted to his FB page basically what I posted here along with mentioning other people have the same issue w/ it. Don't know what will or won't come from it - but I feel better now.

I finally went out to the mail. My screws look just like yours. I posted a pic on fat daddy vape's FB page.
I think I've given up until I get an authentic R91 v1 center pin.