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  1. rurwin

    Concerned about not being able to turn down power

    The MVP outputs DC, and it is much, much cheaper than the Provari. DNA and SX output true DC, but most of them do not down-regulate. The SX350 does down-regulate, just like the MVP. The Provari makes a good deal of sense if you are in the USA, but it is still very expensive. Outside the USA it...
  2. rurwin

    Concerned about not being able to turn down power

    What is economical? The SX350 chip can down-regulate DC. I can buy one for a quarter of the price of a Provari and the mods are about the same price as a Provari. I can buy an MVP much cheaper, but it won't grow with me like an SX350.
  3. rurwin

    Concerned about not being able to turn down power

    4.17V is a pretty good value for a fresh battery under load, especially given that there's electronics between it and the coil. But let's get theoretical. The maximum voltage a Li-ion battery can be charged to without suffering damage is 4.25V. 4.25^2 = 18.0625. Divide by the resistance. of 2...
  4. rurwin

    Concerned about not being able to turn down power

    Actually I was adding a correction to something I had said earlier: The Tobeco can't get down to 5.5-6W, nor can most of the other SX and DNA devices. But the SX350 can. It's an expensive fix, but it is a fix.
  5. rurwin

    Boring contest :)

    Beautiful mod.
  6. rurwin

    Quartz as wick?

    6mm is a big coil.
  7. rurwin

    Concerned about not being able to turn down power

    According to PBusardo, the SX350 controls down to 5W. https://www.youtube.com/watch?v=ARcoviGKT5A&list=UUc345z36sFqyC1BheWmW_Iw
  8. rurwin

    The Erlkönigin : PICTORIAL

    Take the shot three times with different parts in focus and then use a photo-editing app to stitch the good parts of each one together.
  9. rurwin

    Donate to Dr Farsalinos' new study

    To my mind, everybody needs to test to some extent. The flavour manufacturers need to test so that they can certify that they are using safe ingredients (or more precisely, they aren't using known unsafe ingredients) and there is no contamination. The liquid manufacturer needs at least spot...
  10. rurwin

    Does this still count?

    It counts as smoking but, as a rule of thumb and as I understand it, anything you do less than once a week is not an addiction, if that helps.
  11. rurwin

    The Erlkönigin : PICTORIAL

    I notice that list of similar attys doesn't mention the Fogger V4 ;-)
  12. rurwin

    Donate to Dr Farsalinos' new study

    It's relevant to the thread, FDA is a digression here. NB. I was talking about ECITA not ECTA.
  13. rurwin

    Donate to Dr Farsalinos' new study

    This is one test for two components. The ECITA test also tests for many other contaminants -- hydrocarbons etc. I imagine that with a high sensitivity test for DA and AP you could double the price for the existing GC-MS testing. But that pales into insignificance if the FDA demands certificates...
  14. rurwin

    Donate to Dr Farsalinos' new study

    That's a lungful of air being 500ml, in which is mixed 10 micro-litres of eliquid.
  15. rurwin

    Donate to Dr Farsalinos' new study

    60μg, or 20μg/ml for 3ml, per day does not seem correct to me. The NIOSH limit for diacetyl is "below a concentration of 5 parts per billion (ppb) [in room air] as a time-weighted average (TWA) during a 40-hour work week." If we assume 3ml per day in 300 inhales, then each inhale from an ecig...
  16. rurwin

    Donate to Dr Farsalinos' new study

    All well and good, but how good are their standards? For example a well known and popular liquid displays an ECITA certificate on its website, so I wrote and asked ECITA what it meant. At the time the liquid was tested, which is "some time ago", there was no test for AP. The test for Diacetyl...
  17. rurwin

    Quartz as wick?

    Those sort of things, full of flaws and breaks, aren't too expensive even if you buy them. Maybe a few tens of UK pounds; add 50% for dollars. The perfectly formed points with no flaws are worth considerably more, well into the hundreds for a large specimen. The sort of thing we need would be...
  18. rurwin

    Quartz as wick?

    No it isn't. http://hypertextbook.com/facts/2004/JenniferSchanke.shtml In fact it is more of an insulator than glass is, by a factor of up to ten million.
  19. rurwin

    Quartz as wick?

    Quartz is not glass. Quartz glass is not quartz. Quartz is a crystalline mineral that naturally grows as rods. It is a semi-precious stone but in the sizes needed for a wick it should be dirt cheap. If you wanted a flawless point, six inches long and two inches across, then you would pay.
  20. rurwin

    Quartz as wick?

    Look at the pictures. This isn't just one piece of quartz, it's half a dozen of them. The liquid is wicked up the gaps between them.
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