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The oven temperature will be controlled with a $4 light dimmer, wall mount style.

This shows the wiring connections. This is just an illustration, the final wiring will be in a "Handy" box with a cover. The power cord can be seen in the lower right. The cord has a black, white and green wire. I used a dimmer with a Green (ground) wire, so I connected the green wire from the dimmer and the green wire from the power cord together. If you use a dimmer without a ground wire, connect the green wire from the power cord to the metal box. The black wire from the power cord goes to one of the black wires from the dimmer while the white wire from the power cord goes to one of the wires from the heating strip. In the picture above, the white wires with the red marks are the heater wires. The remaining heater strip wire connects to the remaining black wire from the dimmer.


Now cut 2 (or more) disks having a diameter equal to the inside diameter of the oven. Drill one 1/4-inch hole in the center of each and one hole about 1-inch from the edge. Get a piece of 1/4-inch all-thread rod 1-inch longer than the oven along with a hand full of 1/4-inch nuts and washers.


Above shows a Mauser action on the rod with the rod through the center holes of the end pieces. Use a nut and washer on either side of the end pieces and adjust them so as to place the ends atop the screws at each end. Place the rod through the off-center holes, position the rod at the top of the oven and hang small pieces for curing.

A 1/4-inch rod will work for bore diameters of 6.5mm and up. For smaller bores, or if you don't like the idea of passing a threaded rod through your barrel, use a piece of drill rod (Wholesale Tool) and make some stop collars. Most drill rod is only available in 36-inch lengths.

Miscellaneous Ramblings………

  1. The biggest problem is getting a small (wattage wise) length of heater wire. Most heating elements are 700 watts and larger. My oven, with 1 1/2 thick walls works well with 200 or so watts. If you can find a 220-volt element, it will make 1/4 of its rated wattage when used at 120 volts. This means that if you use a 1000-watt, 220-volt element with 120-volt power it will make only 250 watts. (Perfect)
  2. You may consider using a toaster oven heater and it's associated control, or a hair dryer. If anyone comes up with a workable idea please let me know.
  3. I have not made any firm dimensional statements, as you will have to build around the insulation you come up with. The 6-inch (6 3/4-inch ID) insulation seems just about right.
  4. Watch out for the "paper" outer coating on some insulation as it may be foil coated on the inside. Tear away the "paper"/foil around the screws that may be hot-electrically.
  5. Wood seems to stand 350 degrees so a wooden box 6x6x3?-inches with a hinged lid may work.

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