Puzzling Dry Hits on One of Two Anyvape Davides

[amoret]

I love the Anyvape Davide. For me it has the airier draw of a mini protank with the higher volume of a regular protank. So I had one for a while, and then lost one of the (tiny) o-rings on the center column. After spending more on assortments of o-rings than a new Davide would cost I finally just bought a new one. A side advantage of this is that it came with extra o-rings, so now I could fix the original.

The new one came as a bdc. This is supposed to be convertible back to single coil by removing an adapter from the base. After trying it out for a while I decided that I don't really see the point to dual coils, and did the conversion. When I first did the conversion I had some problems. The threading didn't seem to fit right, and the draw was tighter than the original.

So when it was cleaning time I took them both apart, examining them as I did so, and couldn't see any real differences. Cleaned everything thoroughly and put them bck together, deliberately mixing the parts up so I didn't know what came from which. Both went together fine now. Put in new coils, filled them up, and started vaping.

One works just like it should, I'm a happy camper with that one. The other one has been consistently been giving me dry hits and burned flavors. It's not the juice. That is a flavor I've been using all along in various toppers, including protanks great and small, Evods, the original Davide and the new one with the dual coil. It is not the wattage/voltage. This is happening even at the lowest settings on my MVP and VV3. And again, this is a juice that I've been using for months in multiple toppers.

My first thought was the coil, especially since I've been using cheap bulk discount coils. So I changed the coil, and changed it again, with no improvement. I dug out my last genuine Kanger coil and tried that. I tried a used coil that still had a good ohm reading and tried that. I've been staring at the various parts as well as I can without dumping the liquid out and taking everything apart, and visually the two seem to be identical.

When it's time to clean the good one out again I plan to take them both apart completely and see if I can tell what's different/wrong. What I would really appreciate would be any suggestions on what I should be looking for. The one with the problem seems to have the same air flow as the other. I've even stared at the rate of bubbles after a draw and can't see a difference. Obviously something is causing less fluid to get to the coil on the bad one. I just can't figure out what.

 

[JaRod]

I am as puzzled as you are, burnt flavor is usually associated with either dry hits or hot spots in the coil caused by either a problem with the coil itself or too much power, but since you have tried different coils with the same results, and assuming you use the same mod for both tanks, I am clueless sorry.

 

[amoret]

And the latest addition to the confusion is that I needed to replace the coil in my protank 2, so I deliberately used one of the coils I had tried in the Davide. Except for a little bit of bad flavor on the first "drag" (presumably from the dry hits in the Davide) the coil is having no problem in the protank.

My first and main suspicion was the coils, especially since they were an excessively cheap bulk buy.

 

[DavidOck]

Can't see it being the air pipe o-rings. I have one Davide with one missing - I just put that end to the tip and try not to lay it down. Although the times I have, it hasn't seems to leak.

Do you have a PT base you could try in it? They're interchangeable. That would rule out some defect there...

Unless you're getting wild voltage swings from a bad connection. The mod is seeing a fluctuating resistance and going nuts trying to hold the set power. If you were actually swapping the coil to a new base, it could be the one base has a slightly pushed pin. And if just putting the whole thing into a different topper, a slightly longer or shorter air tube might change the pressure on the coil's cup, and the coil...

 

[Chowley]

I have a similar problem with my Davide.

My old one always worked flawlessly, now I just get constant dry hits. I have to turn the thing upside down so that the area around the coil empties out and flip it back over, watching for a few big bubbles before I can vape it reliably. Then repeat a few drags later. The other option is to blow on it until it floods a tad, which gets me a bit longer without dry hits, but much gurgling.

What i think it is, is the holes in the bdc heads have been reduced. I think I remember the aspire bdc heads having 4 holes when I first started using them, now they only have two. I could be mistaken. But its incredibly frustrating, its the only glass tank/clearo i own so i am forced to use it a lot and I used to love this thing.

 

[amoret]

DavidOck: I am using both MVPs an Vv3s, and tried the bad one on both. I will try the protank base at some point today - it's even got the same flavor in it.

Chowley: I'm using regular single coils in it - I didn't like the duals, but didn't have this problem before I removed the extra parts they have for the dual coils.

Thanks for responding. I'm going to be doing a thorough cleaning again tonight or tomorrow, and will be examining them side by side again.

 

[Chowley]

DavidOck: I am using both MVPs an Vv3s, and tried the bad one on both. I will try the protank base at some point today - it's even got the same flavor in it.

Chowley: I'm using regular single coils in it - I didn't like the duals, but didn't have this problem before I removed the extra parts they have for the dual coils.

Thanks for responding. I'm going to be doing a thorough cleaning again tonight or tomorrow, and will be examining them side by side again.

Ah yes, they are a different design so? I have not seen the single coil heads, ever. Thought it might be a coincidence.
I have come across weirdness before buying the same cartos from different vendors, different batches with different performance.
Its a frustrating experience anyway I know how you feel. The Davide is great otherwise.

 

[amoret]

So after cleaning, comparing (looked identical) and putting back together both Davides, same coils, even, now they are both working great. I'm totally confused about what the problem was, but very happy that it's gone.

 

[DavidOck]

Glad to hear the problem's gone, but sure wish there was something to pin it on...

 

[amoret]

Glad to hear the problem's gone, but sure wish there was something to pin it on...

Yeah, I hate not having a why answer. It wasn't even "machine cancer" -- you know, the ones where you take something apart, can't see anything wrong, put it back together and it works -- except you have one piece left over.

 

[DavidOck]

And you can't remember where it came from

Yeah, been there.

 

[regal55]

I gave up on the Anyvape. Just too hard to pull a drag. The coil conversion makes it worse. The aerotank flow control helps a little, but after using a true aerotank its hard to go back.

 

[DavidOck]

I find all my Davide's to draw about the same as my PTs, both full size and minis of both. Maybe try an Aro or PT base on the Davide for a test?

I'm guessing you either didn't remove both parts to convert, or have some other issue restricting the air flow. Attaching the topper too tightly to the battery can put too much pressure on the pin and compress the bottom grommet. Easy to do, especially if the pin's been pushed a bit an not getting a solid connection, when it's natural to tighten some more.

 

[regal55]

Aerotanks work fine no issues and pull about 100% more air than the anyvape conversions no matter how much you fiddle. They are expensive so I ordered some of the $7 aerotank clones, hoping these work out.