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  1. #101
    Join Date
    Feb 2011
    Location
    Belpre,Ohio, USA
    Posts
    1,315

    Default Re: My Oxalic Acid Vaporizer

    Crofter, I have been following this thread with great interest and was wondering if you could describe or show a picture of the stainless resistor wire that you used, it sounds like the answer to the vaporizer getting too hot. By the way your design is looking great so far and I look forward to seeing what all you guys come up with.
    Bill...in Southeast Ohio

  2. #102
    Join Date
    Jul 2010
    Location
    Auckland,Auckland,New Zealand
    Posts
    6,015

    Default Re: My Oxalic Acid Vaporizer

    Quote Originally Posted by Daniel Y View Post
    According to the most recent information I have been seeing it seems that multiple treatments (3 to 4) spaced a week to ten days apart is currently the common wisdom. In the article at SB (scientific beekeeping) He recommends only one treatment per year with some reference that more frequent treatments may be harmful to the bees.
    According to what I have been reading, OA administered as a trickle can have a suppressing efect on brood rearing if used more than once. This is because if the OA is administered as a trickle the bees consume it, add it to their food stores, and feed it to their larvae.

    If it's administered as a vapor the bees consuming it is less of an issue and the same research indicated it can be administered 4 times a week apart with no measureable effect on brood raising.
    44 years, been commercial, outfits up to 4000 hives, now 120 hives and 200 nucs as a hobby, selling bees. T (mostly).

  3. #103
    Join Date
    May 2011
    Location
    Algoma dr. Ontario, Canada
    Posts
    952

    Default Re: My Oxalic Acid Vaporizer

    Quote Originally Posted by WWW View Post
    Crofter, I have been following this thread with great interest and was wondering if you could describe or show a picture of the stainless resistor wire that you used, it sounds like the answer to the vaporizer getting too hot. By the way your design is looking great so far and I look forward to seeing what all you guys come up with.
    It is just a piece of stainless steel wire about .040" dia. put in series in the feed wire. I cut it longer and just slide the clamp along until I get the resistance I need. It has much higher resistance than copper. It gets quite hot to the touch. I now have a piece about 5" long in the circuit and seems about right.

    I think my bowl would be better to have been made of aluminum than stainless as heat conductivity is much better so the bowl heats evenly. There is a bit of a tendency to boil up and crust that gets hung up on the sides of the bowl that are cooler, then the clock ticks till the bowl gets hotter and the heat runs up the sides to melt down the hung up oxalic. Molten oxalic crystals are not very fluid and I suspect that if you heat them to the point where they are, you may be overheating and getting breakdown into less desirable gasses but that is conjecture. What I have will work but the time taken is close to 4 minutes before all the smoke has settled. Some of the patent ones claim 2 minutes which would be a concern if you were doing multiple hives.

    I am interested in seeing how some of the others turn out. I am getting the sense that there is not a whole lot of excess heat to waste when working with one glo plug.

  4. #104
    Join Date
    Oct 2011
    Location
    Grayson, KY
    Posts
    286

    Default Re: My Oxalic Acid Vaporizer

    I hate to pull this discussion a different direction but, has anyone considered a hot glue gun as a heat source? They are cheap and readily available.

  5. #105
    Join Date
    Nov 2009
    Location
    Manning, SC
    Posts
    2,237

    Default Re: My Oxalic Acid Vaporizer

    Quote Originally Posted by beeman2009 View Post
    Daniel Y,

    Check out these folks, http://www.members.shaw.ca/orioleln/index.html , they make & sell a 12 volt OA vaporizer for $ 90.00 plus s/h. They are out of Canada. but I hear they are good folks to deal with. Just my 2 cents.
    I bought one from them, it works just fine and a nice piece of work that I did not have to engineer and make...
    http://OxaVap.com
    Your source for the Varrox Vaporizer, "One of the highest ranked" by R. Oliver

  6. #106
    Join Date
    May 2012
    Location
    DFW area, TX, USA
    Posts
    1,097

    Default Re: My Oxalic Acid Vaporizer

    Quote Originally Posted by BigGun View Post
    I hate to pull this discussion a different direction but, has anyone considered a hot glue gun as a heat source? They are cheap and readily available.
    While we are brainstorming, I had thought of a small, battery powered soldering iron too.....?
    LeeB
    I try to learn from my mistakes, and from yours when you give me a heads up :)

  7. #107
    Join Date
    Oct 2011
    Location
    Grayson, KY
    Posts
    286

    Default Re: My Oxalic Acid Vaporizer

    Quote Originally Posted by Lburou View Post
    While we are brainstorming, I had thought of a small, battery powered soldering iron too.....?

    I actually saw a picture of one just like that. It was 110 though. It was a copper end cap wired to the iron. Used copper wire thru holes drilled in the bottom. Both the glue gun or soldering iron would be easy to power with a small inverter from a vehicle even with an extension cord.

  8. #108
    Join Date
    Jul 2011
    Location
    Hamilton, AL
    Posts
    61

    Default Re: My Oxalic Acid Vaporizer

    Quote Originally Posted by BigGun View Post
    I actually saw a picture of one just like that. It was 110 though. It was a copper end cap wired to the iron. Used copper wire thru holes drilled in the bottom. Both the glue gun or soldering iron would be easy to power with a small inverter from a vehicle even with an extension cord.
    Good idea on the inverter. I've put them on several vehicles but didn't think about one to run a vaporizer. When I get a little cash saved up I'm going to put an inverter on my truck so I will always have a power source for doing cutouts, running saws, vacs, ect...

  9. #109
    Join Date
    Feb 2011
    Location
    Belpre,Ohio, USA
    Posts
    1,315

    Default Re: My Oxalic Acid Vaporizer

    Thanks for the resistor info crofter, you have enlightened me in an area that I have had little experience in, I will have to do some experimenting soon.
    Bill...in Southeast Ohio

  10. #110
    Join Date
    May 2008
    Location
    Providence,RI,USA
    Posts
    4

    Default Re: My Oxalic Acid Vaporizer

    I have seen a YouTube of a German man using a charcoal disc and an aluminum cup to vaporize Oxalic Acid in the empty (Feeder) Box on top of the Brood Chamber. He lights the Disc, Waits until it whitens, places what looks like a teaspoon of OA in the cup and sets it right on the hot charcoal disc. He then closes the top and walks away. I assume it works. Anyone have any ideas about this method??

  11. #111
    Join Date
    Oct 2011
    Location
    Grayson, KY
    Posts
    286

    Default Re: My Oxalic Acid Vaporizer

    Could you supply a link?

  12. #112
    Join Date
    May 2008
    Location
    Providence,RI,USA
    Posts
    4

    Default Re: My Oxalic Acid Vaporizer

    I Don't read or write German, but a picture says.........http://youtu.be/y4rm5pDvJTo, Seems pretty simple although unscientific. I gotta think it works or this guy wouldn't be doing it.

  13. #113
    Join Date
    Sep 2011
    Location
    Reno, NV
    Posts
    3,064

    Default Re: My Oxalic Acid Vaporizer

    That is keeping it pretty simple. Here is an example of where you can get the charcoal.
    http://www.hookahcompany.com/all_hoo...oal_33_ctg.htm
    They are used for Hookas and should not be that difficult to find.

    The aluminum cups. Here is the photos from a google search for aluminum dish.
    https://www.google.com/search?q=alum...w=1024&bih=578

    One concern that comes to mind is the effect of charcoal being burned in the hive. But at the same time these charcoals are made to smoke. Definitely answers a lot of other problems such as the ability to treat multiple hives at once and portability.

    By the way while shopping for the coal keep in mind that they do make a small pair of tongs for handling the hot charcoal. might be handy to have a pair rather than bare fingers to move cups etc. if you dropped a coal for any reason etc.
    Stand for what you believe, even if you stand alone.

  14. #114
    Join Date
    Nov 2012
    Location
    Roswell, GA
    Posts
    1

    Default Re: My Oxalic Acid Vaporizer

    Excellent the charcoal method as it applies the KISS principle. Thanks

  15. #115
    Join Date
    Apr 2009
    Location
    Murray County, Georgia
    Posts
    214

    Default Re: My Oxalic Acid Vaporizer

    You could probably use the stuff that caterers use to warm trays. It comes in a can, they light it in the can and it burns for hours. Someone could probably figure out how much is needed to provide the necessary heat, dish it onto something, light it and place it in the hive. Use just the amount needed to get the job done.

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