Yoder is a brand revered by competition cooks for well-designed high end charcoal and wood fired smokers and BBQ grills made in the USA. In 2010 they introduced two pellet cookers. The Yoder YS640 is the largest. The numbers stand for the square inches of cooking surface with an optional second shelf that adds 65% to the cooking surface area. So the YS640 has 640 square inches of primary cooking surface, about 11.5″ of headroom, and the main grate is 20″ deep.
The Yoder YS640 pellet cooker comes with a sophisticated, proprietary digital controller. Yoder asserts they are not PID controllers and not based on any off-the-shelf temperature controller of any sort. Yoder states they designed the board from scratch around a general purpose micro-controller chip and wrote their own code from the ground up in an attempt to provide superior flexibility, efficiency and accuracy. We have not tested Yoder’s Pellet Smokers, but they have a very good reputation and consensus among owners is favorable.
A unique feature is Yoder’s Variable Displacement Damper. (Shown above). This is a metal plate that you may move from left to right along the lower smoke box. Positioned all the way left, it concentrates heat directly over the fire pot for conductive searing with optional aluminum GrillGrates. Move it back to the right for even heat across the entire smokebox.
The Yoder YS640 is 32″ wide and weighs 313 pounds. It is said to have a cooking range from 150 to 600°F. Hopper capacity is twenty pounds. The cooking chamber is 10 gauge and the hopper and cart are 14 gauge, finished with high temp urethane. That is thick steel, great for heat retention. The grill body has a 10 year warranty, three years on the control system and one year on the igniter.
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