@ Underdog , thank you , so how would i run it at the same temperature as my pd? is that possible? do you mean it depends on the wood etc , is the voltage the same 12v?
So ash is much harder than poplar, is there any harder than ash ?, if so can you name the harder 1's you currently have in stock or about to make.
So it would be less effort extracting the vapor with a hotter running log? , though im still inclined to want a cooler running one because ive become hooked on my pd and the rate it extracts , but i have not decided yet.
A variable power supply would be the best way of running a Dog at a lower voltage and is really a pretty worthwhile investment for only $30-$40 for a decent one. Alternatively you could use an LED dimmer ($10+) with the stock UD power supply to lower the temp for sessions though it seems like it's hard to find a decent quality one and it seems like they burn out (the LED dimmer) if left 'on' too long (from what other Dogs report lately). Lastly you could always buy a separate power supply for lower voltages, say like a 12 or 12.5v regulated power supply from Jameco for probably $10-$15. As far as harder woods, yes there are many harder woods than Ash but it's not practical to try and fine-tune the temp a Dog might run at based on wood density to that level of accuracy if that's what you're thinking, if that's your goal then see the above about power supply options. In regard to extracting vapor to me I think a hotter running vape makes it 'easier' to extract more. It's really hard for me to make direct comparisons from UD to PDs as they (in my mind) apples and oranges, the UD isn't based on the PD so it's a totally different performance curve and usage experience. Maybe some of the other people here in the thread who own both and have used both could chime in with some more useful and less biased info?
@ Rick - I agree completely with your assessment of the power supplies, my experience has been very similar.. that being said I did just order one of those baby-VVPS units to test out, will see how it goes when it arrives, if it arrives lol.
@ HoneyAir - The UD isn't user serviceable and is put together much differently than the PD so replacing the resistor is a fairly straightforward task for me here in a well stocked shop but not so much so for a home user. Doing this on the UD is also what I consider a 'destructive disassemble' in that it typically requires the actually drilling out of a good chunk of wood, the wiring and power plug are almost always damaged/destroyed during this process as well and are typically replaced along with the resistor. Also for what it's worth the resistor typically isn't the point of failure on an UD, 90% of the time a failure is in the power plug as they don't always handle the UD heat well. This is more of a concern in the smaller pieces like Twigs or when pieces are run over-voltage as well.
Ok, moving on.. just finished up a custom piece (hope the potential owner likes it!) in the shop today, the piece that I showed the rough form a couple days back with the jack'o'lantern face on it. I've changed the shape a bit but left the face, sanded and finished the piece. I've been calling it the Halloweenie. Picture below (Chilean Laurel Burl):
Also I paid a visit to a cool guy here locally who happens to be one of the only arborists licensed to do work with our city (which is a city full of beautiful hardwood trees). As many of you know I'm a sucker when it comes to wood, in that I can rarely pass any up.. it all seems to want to come home with me. Well today I might have went a little overboard and I might have blown the budget for the month. You guys will have to help me out and buy some more Dogs or it's nothing but ramen around here for a while lol. Also I'm running out of places to store this stuff. Also, I'm running out of time to saw, re-saw and organize wood. Maybe I should get an intern.. now I've got a few THOUSAND pounds of wood to deal with. Again. ;-)
Black Walnut, Sycamore, Black Oak, Chinese Pistache, Persimmon, Almond, Olive, English Walnut (and more I'm sure). The Underdog guarding the stash as usual.
Time for lunch!