TK50/TK70 Info

[Chuck Guzis]

If it helps, I use an PID controller in my unit (inexpensive on eBay) 
with a PT100 sensor in the center (open air) of the chamber.  A 
low-speed fan (from a microwave oven, using a 7W lamp in series) blows 
down over a 60W incandescent lamp at the top of the chamber and over the 
material to be treated.  As I mentioned before, it is well insulated.

It takes about 20 minutes to reach and stabilize at 58C.  It can run for 
days using very little power.  Using a separate temperature probe, I've 
noticed no hot spots to speak of.

Capacity is about 1.5 cu. ft.

--Chuck