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I have three new unused springs here on my desk, all three measure .06Ω measuring from the plate to the top of the spring (with the lead pushing down as a battery would). When I was experimenting with my Mini 2.1, I soldered the spring, rivet, & plate together, that one I get .03Ω. On my Grand that I previously measured .06Ω total interal resistance, that spring measures .04Ω (no solder).
Not saying those measurements are absolutely 100% accurate but that's what I get using a Fluke 187 & leads zero'd out.
So, Time I had today, and no package from DZ yet. Therefore, thusly, and consequently I decided to pursue the v-drop issue independent of the firing pin "shape" pursuit. I figure I might as well isolate the two themes anyway . . . . for SCIENCE . . . . . . 
I took a long strip of my brass shim and folded it such that the fold lands on the business end of the firing pin (just a plain ol' used one). I decided to use a worn and rounded one to increase a bit of contact area; but more importantly, to avoid poking a hole in my brass. Looks like this . . . .
"What, pray tell, came of this, pdib?" (you may well ask . . .)
( . . .. and I will tell you . . . . )
0.5Ω coil (on the low end, as my meter was flashing over to 0.4 about a quarter of the time)
Battery at 4.13 V
Voltage under load: 3.87 V
Total V-drop = 0.26 V
Not bad, not bad. Mind you, this is in combination with the hot spring mod.
This is by no means a competition w/ my new friend dhomes, in fact it's inspired by his trick-jiggery; but, (in the interest of science . . .) I want to point out that that's pretty much the same improvement as we saw in his modifications. I've been wondering how much this has to do with materials that gain resistance under load. Does stainless steel do that? I noticed when soldering stuff a while back, brass seems to heat up differently (more slowly?).
I took a long strip of my brass shim and folded it such that the fold lands on the business end of the firing pin (just a plain ol' used one). I decided to use a worn and rounded one to increase a bit of contact area; but more importantly, to avoid poking a hole in my brass. Looks like this . . . .
"What, pray tell, came of this, pdib?" (you may well ask . . .)
( . . .. and I will tell you . . . . )
0.5Ω coil (on the low end, as my meter was flashing over to 0.4 about a quarter of the time)
Battery at 4.13 V
Voltage under load: 3.87 V
Total V-drop = 0.26 V
Not bad, not bad. Mind you, this is in combination with the hot spring mod.
This is by no means a competition w/ my new friend dhomes, in fact it's inspired by his trick-jiggery; but, (in the interest of science . . .) I want to point out that that's pretty much the same improvement as we saw in his modifications. I've been wondering how much this has to do with materials that gain resistance under load. Does stainless steel do that? I noticed when soldering stuff a while back, brass seems to heat up differently (more slowly?).
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That's pretty good! And that is with your cathode shim too right?
Well Fri the 13th is not known to be a lucky day so it looks like the package should be there tomorrow.
EDIT: duh, you said it right there.
Well Fri the 13th is not known to be a lucky day so it looks like the package should be there tomorrow.
EDIT: duh, you said it right there.
Yep, that's together with the brass shim on the spring. Still might get mail today . . . . . .
this post could serve as a script for what just happened:
check classies for Woodvil
... squonk and fire the Grand... odd, no vapor... hmmm, maybe i pressed the button at an angle... give it a manly push, you wimp... accidentally touch the RM2... damn, that's hot... hey, is that a blister?... slip the grand out the cozy (thank you, Karen ... top half of Grand very hot... what the hell was pdib saying just yesterday?pulled the battery and it was cool. tested at 3.5v, not unusual. tested RM2 on ohmmeter- 1.1, same as at coil's birth. spring looks fine.
now the Grand is drying off after a bath, awaiting a file and some noalox. fortunately, i have a backup or two
thanks, dib! if this post had not been rattling around in the back of my brain, i'd probably have made it worse...
Well, used-to-be-dwallen, i'm curious as to what it was? maybe a wire touching the cap? Anyway, good on ya!
Well, hurry up man!. . . . . . cause I'm vaping this 24g setup at a true 300+ watts and I know you don't want me blowing face!
Yes, very much so. I have yet to measure/document it. I'm trying a variety of patterns of utilization. And haven't clocked enough time with any single one to see a pattern develop.
Meaning, one coil might be "pre-modded" (lower) res. I'll vape it without the shim until ~3.85V (my usual batt. swapping point), and then I'll engage the shim and get more batt. life that way. Another coil might simply be higher res. and I run the shim the whole time. Still fiddling.
ADDIT: Also, as in the post below, I'm enjoying being able to run more wire mass.
Meaning, one coil might be "pre-modded" (lower) res. I'll vape it without the shim until ~3.85V (my usual batt. swapping point), and then I'll engage the shim and get more batt. life that way. Another coil might simply be higher res. and I run the shim the whole time. Still fiddling.
ADDIT: Also, as in the post below, I'm enjoying being able to run more wire mass.
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I made a quick video demonstrating the performance I'm getting. Notable, I think, are the heat-up time of an 11 wrap, 24 gauge coil and the charge state of the battery.
Oh, here's the coil . . ..
Oh, here's the coil . . ..
Definitely, huge improvement, I get 3.80 volts on battery AFTER 24 hours of using it on a .7ohm
It's a thing of beauty indeed
24hrs! What's the capacity on the . .. Sonys? Those are like 1500, right? So, you must mean the Pannies, right?
I'm reporting on a Panasonic ncr18650pd (the green ones)
The Sonys are 1600 mah btw, MNKEs are 1500
ah, yes. thx. that's a 2900mAh, . . . . . .. methinks.
what I'm finding, specifically, is that I used to consistently pull my batteries at 3.84-3.85V. I didn't often test them . . . but every single time I have, that's what it read. So, the battery in the video, I vaped it to the same subjective point (a pretty decent kind of subjective, since it always meters the same), and measured it at about 3.65V. And that was powering a pretty big coil mass.
what I'm finding, specifically, is that I used to consistently pull my batteries at 3.84-3.85V. I didn't often test them . . . but every single time I have, that's what it read. So, the battery in the video, I vaped it to the same subjective point (a pretty decent kind of subjective, since it always meters the same), and measured it at about 3.65V. And that was powering a pretty big coil mass.
i *think* those are the ones i never could figure out what the chemistry really was. Some of the pannies are described as a "hybrid" chemistry, which is supposed to be as safe as IMR. i can't find the link to the spec sheet on the hybrids tho.
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