Had a go a temp control with the 1.35ohm SS coil [...]
- it drains the battery a lot quicker than cruising in wattage mode, and complains about low battery when you draw.
- It gets up to heat OK then throttles the power down below the wattage I usually run the step down but struggles to apply more power to compensate for the temp drop when you draw as the mod tries to fire at a higher wattage again.
The Claisen adapter I used for this build is about 1cm longer in the mid section and has thicker glass which probably explains why this build needs 19W, which works well with a PSU but I think we need to go a lot smaller for box mod use really.
Oh, shooot. You think the mod gets the coil and
immediate glass next to the coil up to temp, but fails to heat soak the entire unit? If it drops wattage that low, I wonder if the entire unit ever truly reaches temp. You might have to draw air through it for extended periods of time to really get the heat to spread? Idk, I'm just speaking theoretically from what you told me, I don't know what's actually happening. Hrmmm. Not looking that promising. Tbh, how many people even have box mods anymore? Let's be real, everyone is vaping on pods or Juuls, you know? Are we really helping that big of a crowd by making it box mod compatible...? Arctic Fox firmware compatible, that is, it's rather specific. I know box mod compatibility is a selling point for me, kind of, but not for everyone.
Just got the new heat shrink tubing in the mail. Doubled up on aerogel, re-Tube'ed it up, it's actually a lot nicer now in the hand, it feels cleaner. Just had my fifth cold start session on a single charge with the battery, I'm pretty sure it recently got to 1/4 bars, like late in the last sesh, and battery only reads 36V on LCD step down converter, I'm gonna have another sesh on it before charging, so around 6 cold start sessions on a single charge starting from room temp, it seems. Those are all single bowl sessions, btw, ELB pretty much filled, zero pack down, just enough space left to shake the ELB and mix the herb up (not sure if this is necessary, I think The Tube extracts everything without turning the stem or stirring the bowl, it's just a habit to shake it now between hits, I guess, or maybe the herb disturbance vapes it quicker). One bowl is a decent session for most people, but you could easily get 5 sessions where you pack two bowls per heat up, I'm guessing.
-Edit-
Had a 6th cold start sesh, might be able to get a 7th. Voltage still above 36V, 1 out of 4 bars on battery.
-Edit 2-
Had a 7th sesh, battery didn't light up a bar meaning voltage dropped below what the battery likes. It read ~35V on LCD step down converter. I put it on the charger, as soon as it started charging I checked the voltage level and it read one bar. Idk if the battery recovered from the session and gained a little voltage, or if it was the charger pumping volts into, but it was really close to 7 full sessions on a full charge.
Tube barely got warm in places with new aerogel layer. After I have my last sesh on this battery charge I'm gonna recharge it and run The Tube for like 30 minutes or something and see what happens. Tbh, I don't like that it even got warm in two spots during a normal sesh, that's not cool, imo, might need tweaking. If it got warm on a normal sesh then it might get too hot to touch in spots, or maybe even melt through the heat shrink tubing again somewhere if you have a prolonged sesh. Why you'd have it running for 30 minutes, Idk, like 8 people could get high in that time, I feel, but it's gotta be safe.
I'm thinking JB Weld will be fine to seal the aerogel on top and bottom so dust doesn't get everywhere. JB Weld is good to like 500F, I don't think the glass gets remotely that hot, like I can touch it, just not comfortably at all if it's been on for a long time. JB Weld was designed for lawn mower repair, I'm pretty sure, it should be fine in this setting.
If I extended the aerogel all the way to the bottom of the glass female to female this unit would probably be nearly drop proof (don't drop directly on head or butt.. Idk, I wouldn't wanna try it, period, but in the event..). Idk, I like the glass air intake being exposed, personally, but drop proof is enticing. If I have to re-do the shrink tubing anyway because it gets too hot from a 30+ minute heat soak I might change up the aerogel on the bottom.
Getting close to finished, though... Not much else I can do once these last few niggles are sorted. Sort of reminds me of a battery powered VapeXhale Cloud EVO: all the glass, the thick black tube, Idk. Even uses the ELB and heats up just as fast, I believe.
-Edit-
Had another sesh on it, I started drawing very slowly through the unit at like 1.8 Amps, I usualy hit it at 1.75A or lower. Drawing air through the unit heated the glass more thoroughly/faster, I think it increased power draw slightly, too. I was able to start my first real draw (achieving slight vapor) at 4:00! This simple technique decreases heat up by like 40 seconds. If I was able to install the coils closer to the center of the carbon filter so glass beads surrounded the coils/glass rods on all sides it would probably heat up faster and wouldn't need the inhale assistance. If I make a second unit I'll mess around with coil installation techniques. It's just tricky because there's more than one coil and the coils need to stay tight around the glass rods, meaning the resistance wire needs to remain taught. We'll see,
@Hippie has given me some ideas through PM.