@brainiac
Thank you
Yep! I'd say, that's probably as tidy and neat as it gets, with all the wiring gone now
@Megaton
Thanks! I like the ash, but cherry is my favorite so far
@Abysmal Vapor
The (proven) concept of soldering the resistor straight onto the jack, I got from Alan 's Toasty Top and orgiginal HI design, which he commentd on already, several pages back. Those were of a similar length. The insulating plastic ring is a full 2 cm away from the resistor, which is kilometers in terms of the miniature scale we're dealing with here (and probably a temp difference of at least a 100Β°C or more)! Placing a load at that distance from the heater, a breeze of hot air'd be all you get at 7w and 12v, but no vapor
And of course, I exchanged heaters several times between units within the last week, also experimenting with diferent length for the design and the insulation showed no sign of heat degradation at all. Would be a poor jack, if the insulation couldn't handle that
I settled for an overall 5,5 cm length for the heater and jack (excluding the nut), b/c with the top leg of the resistor bent down in a spiral shape to create some disturbances in the air flow, that's the maximum I can get to solder it directly to the minus wing of the plug, without having to add a splice or an additional piece of wiring to bridge the gap. Keeps the soldering to a minimum, doing away with two additional soldering spots.
(
ETA: Re the thread cutters: yup! Got me a similar multi part set for just β¬ 15,- from Amazon. Thing is, it misses the M11/1 cutter bit, that is needed for cutting threads fitting for the M11 threading of the jack, b/c that's regarded as rather 'uncommon' (it has 5,6,7,8,9,10mm bits and then comes 12mm). The two bit M11/1 set there cost a whopping β¬ 25,-!
You'l need to drill a 9,5mm hole for the M11 threading, BTW.)
ETA2: Here! This is the insulation after a week of use for maybe 10hours/day. The tiny white spots all across are just dust and wood particles (did some sanding around the top after the fact), reflecting in the flashlight, I used for getting better lighting there:
Hi folks
After some experimenting
with the newly arrived blanks, I've the numbers down so far now for an underlying standard, regarding minimum dimensions of a Misty unit, which needed some reworking due to having the base now accommodating the DC input plug and the midsection of the Misty housing the DC jack, onto which the heater is soldered.
Minimum hight will be 9 cm
Minimum diameter will be 4 cm
Top bore will be 3 cm * 4 cm (wide/depths)
Bottom bore will be 2,5 cm * 2,5 cm (w/d)
Mid section will be 2,5 cm
Heater cover will be 4 cm
Heater overall length (jack inclusive) will be 5,5 cm, extending up to 3 cm into the heater cover, leaving another centimetre for the internal air gap and the ss tip to enter.
Hight (and thereby distance to load) of the heater extending into the heater cover can be varied about 5 mm, by adding 1-2 retaining nuts at the base of the DC jack, before threading in, making it easy to do hotter or cooler running units, as need be or wished for.
As a general rule, Misty units can be bigger than this (I plan for 3 sizes/diameters: 4 cm; 4,5 cm and 5 cm diameter), but not smaller!
The 9 cm minimum hight leave another centimetre for adding an optional wooden bottom cap, which is pure pragmatism here. The blanks come pre-cut at 10 cm length. Will make a 10 mm bore there for the cord to exit, centred at 1 cm hight from the bottom of the blank and then cut off the blank at 1 cm, leaving an arched aperture of 0,5 * 1 cm for the cord to exit and a similar aperture in the cut off piece, that can serve as optional bottom cap then (interchangeable of course with other wood choices of the same diameter), so that we have a semi circular aperture there, if the bottom cap is applied.
Here is a shot of the three units I experimented with in broad daylight (l>r: Ash, Cherry, Mahogany) and another shot of an Oak blank, with the optional bottom cap bored and cut off, and yet another of how a oak cap would fit onto a Mahogany unit (the cap obviously not yet sanded and waxed).