Discontinued Purple-Days Vaporizer

Forgetting about the Myrtlezap, it's design is irrelevant and comparing the PD to it will only end badly, as it has. We can only look at Tom's decision to add more surface area to his heat exchanger. Only with the myrtlezap out of mind can we ask questions. Was it the right thing to do? Does it make a significant difference in the rate the energy from the exchanger is transferred to the air? Well it absolutely does, there is no debating that it's elementary physics. So that takes us back to the first question, was it the right thing to do? Yes anything that will help transfer more energy to the passing air will help. What Tom is trying to do is no different from what the radiator in your car does. Transfer the most amount of heat as quickly as possible to the air, which is not very easy to do. Air has a relatively high specific heat, and is actually a great insulator. So it takes a significant amount of energy to raise a certain amount of air by one degree. The more energy you can transfer to the air, the more energy you have available to vaporize your beloved herbs.

Again this has nothing to do with the differences between the PD and the myrtlezap. But about Tom's decision to implement fins to his heat exchanger, which is far from uncommon that is exactly what you do when you want to increase the transfer of heat energy, you increase the surface area. The fins are not the only important part, you also need mass. Without enough mass to hold additional energy the fins will cool significantly as it gives off it's energy into the air. The extra mass holds extra energy to be used as the fins give it off. You could compare the added mass to a capacitor, while it is not the source of energy it acts as a buffer keeping the temperature and energy levels stable.

Many years ago there was a concert in town; a crowd of people stood outside waiting to get in. Bill Graham, the promoter, stepped outside onto a terrace level to announce that the doors will open shortly. Someone looked up and yelled, "Hey Bill! Why don't you let us in for free?" Bill Graham came downstairs, walked through the crowd then came up to the person who yelled and asked him, "Do you have a ticket?" "Can I see it please?" The guy took out the ticket. Bill Graham looked at the ticket, then tore it up. He then opened his wallet and reimbursed the guy for the cost of the ticket, then he said, "Get the hell out of here," and then walked away.

That's style.

ok i see the scientific point but in as far as vaping, does it stay hot longer, easier to draw on, more through vpe, thicker, what

on the subtle differences, it could prove to me to be totally different...still i think a silver surfer is next in line but if there is a different(not better as that is opinion) then i could see a reason to get this too. on the MZ i dont feel or taste it much if at all after the first draw and i am still unclear as to when it is done

jeffp said:

That's style.

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I always admired Bill Graham.

I want some reassurance that I'm not completely stupid... but has anyone else ever stuck the wrong end of the stem in there mouth when blowing out the material?

Holy shit, did it again last night, 3rd time I've done it... extremely hot metal vs. soft lip tissue = KO!

Very painful

Ahh He's opened the flood gates for stupid stories lol

Nope, never done that one OUCH!

But being enamored with the buzz butter one night, i told myself, now i musn't stick the pd tube into the buzz butter as a tool to lather it up...BUT guess what, I did it, probably on my third stem

Chubba said:

I want some reassurance that I'm not completely stupid... but has anyone else ever stuck the wrong end of the stem in there mouth when blowing out the material?

Holy shit, did it again last night, 3rd time I've done it... extremely hot metal vs. soft lip tissue = KO!

Very painful

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Can't say I have put the metal tip in my mouth but I have dropped the tube on my lap and I have also had it stick to my lip and I grabbed the metal tip with my hand by accident. Hot little fucker, ain't it!

It might help if you have a glass jar to tap it out in. One so you don't have to clean the blow bag as often but also the process of tapping it out will kill some of the heat before you blow the remainder out. Also you end up with your ABV nicely stored in a glass jar ready for whatever reincarnation you might come up with. You could use a mason jar with a screw lid or a glass candle jar with the pop off lid.

Chubba said:

I want some reassurance that I'm not completely stupid... but has anyone else ever stuck the wrong end of the stem in there mouth when blowing out the material?

Holy shit, did it again last night, 3rd time I've done it... extremely hot metal vs. soft lip tissue = KO!

Very painful

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I haven't put my lips too the metal part (yet), But have pressed them firmly against my fingers when trying too blow it into the bag and missing where I place the tube.

I did however burn a nice little circle onto my face with the PD itself. The reason this happened was my first power supply died because I was being too rough on it. The PD was just not keeping heat, So I plugged it into a different adapter so it would heat up. I walked away for a little while came back. I used too check the heat by holding the PD a little close too my face. well this particular time I sneezed and the PD slammed into my cheek for a brief second. For two weeks after I had a nice little perfect circle scab on my cheek. There is a nice almost invisble, perfect circle, shaped scar there now.

Chubba said:

I want some reassurance that I'm not completely stupid... but has anyone else ever stuck the wrong end of the stem in there mouth when blowing out the material?

Holy shit, did it again last night, 3rd time I've done it... extremely hot metal vs. soft lip tissue = KO!

Very painful

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Haha, yeah I've done that one before.

well this particular time I sneezed and the PD slammed into my cheek for a brief second. For two weeks after I had a nice little perfect circle scab on my cheek. There is a nice almost invisble, perfect circle, shaped scar there now.

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Serious? You must have a slightly different shape at the top or a closer HE, my PD is 100% safe against any surface bar pretty much small fingers deliberately stuck down into the HE.

You can hold the PD directly against your face, even push it in, no burn... I do it everytime I vape, nice and warm.

The HE on mine is quite close too the top of the PD. The tube is less than 5mm from the top... I have seen other pictures showing other peoples HE in relation too the top of their PD, There seems too be much more wood on those compared too mine (HE sits lower inside the wood)
its very easy too touch the HE on mine if your not paying attention. Any slight pressure is enough too push fleshy parts of your hand right into tube of the HE. If I grab it too check for heat I used my hand cupped over the HE avoiding the fleshy part of my thumb (which also has been burned a couple of times) and I dont have fleshy hands.
the top of the HE tube is roughly 3-4mm from the top of my PD

When i first got mine and had plugged it in and it was up to temp,i decided to smell the top of the PD for some reason and burnt my nose on the heat exchanger lol.

I haven't put the wrong end in my mouth... yet.

Somewhere in this long thread, Toofat, I compared the resistor to the engine and the heat exchanger to the radiator, so that is how I look at it too. Nice explanation of why you need both surface area and mass.

I don't taste burnt popcorn no matter how long i inhale from my PD... is this a feature, or is my PD not reaching high enough temperatures? it is definitely producing vapour!!!!

'Burnt popcorn' taste is from overheated herb. If you do get that from a PD it is because a crumb of herb has fallen into the Heat Exchanger (where it's not supposed to be) and is against the resistor and is overheating. Turn the unit over and tap it out.

Generally loads that are tamped lightly with a fingertip will stay in place in such a small diameter tube (bowl). If you want to pre-check a loaded bowl just tap it over your palm a time or two and if nothing falls out you are good to go. Others hold the unit horizontal on the first draw (after heated the load will remain in place till it is cooked). Loading and usage is varied (even in the same household )

If you've got the vapor, it sounds right. You can never combust in a PD. The AVB can look greenish. However i find it does not contain that much strength after it's been through the PD if you try to re-use it, it seems to really extract the stuff out well.

Chubba - thanks for the laugh and reassurance that I am not the only dumb ass out there! I did the hot lips thing too. Because I happen to like my lips, and I know that once a stupid stoner move...always a stupid stoner move....I made the best $3 investment ever.

Here are some pics







Found them at Walmart next to the mason jars (they are made by the same people). They have screw on lids, and I was able to take a knife and make the insert hole in the lid in about two seconds.

Haven't burnt a lip or finger since!

Soaper said:

....I made the best $3 investment ever.

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Pretty cool idea. You should put this in the tips and tricks thread. Lots of great ideas over there.

I'm just thinking heat, plastic and things that might be transfering from the ss metal bowl of the PD Stem.

I just lay mine on one of the tote bags, in a drawer.

so once it is done it has a tendency to fall out? i have been using mine and tapping it lightly on the desk and seems a bit falls out and I hit it again and it seems to "freshen" it up sort of speak. could be all in my mind form being vaped too

Purple-Days said:

Thought I would share this with the PD family.

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Oh my god...I LOLD SO HARD...

Happy - I was concerned about that too, which is why I didn't try it until I found the Bell plastic. These are made by a canning manufacturer and were made for heat and cold extremes. Figured I'd give it a shot....seemed easier to cut a hole in the top of these then their metal canning jar lids.

After really trying, I couldn't get the stem hot enough to melt the plastic. I suppose if it sat in the unit for a long time (more than the 10 minutes I did) and you held it against the plastic side for a pretty good while (more than the 30 or 40 seconds I did) you might get transfer. But it doesn't happen under normal use, for sure, and I didn't get any tranfer when I meant to try to melt it. I guess it is possible, but I haven't had that problem.

Just thought I'd share - it makes blowing out the stem easy as the bag, without the burn factor.

Okay, I got pix of my new PD! Sure is pretty... So pleased to have it!!! I think the wood grain looks much nicer in person though






Trying again! Damn I'm challenged at the photo thing...

Holy Crap!!! Sorry they're SO big!

Absolutely gorgeous Lo! Should be getting my shipping notice any day now