Hi Mex,
My temperature results are great! With ambient being 27 c (80.6 f), the hottest part of the autoformer is 33.3 c (92 f). I keep a plastic tub over the autoformer as rain prevention.
The hot spot is the bottom--so I'll be adding some taller "feet" to allow for a little bit of air circulation. I have some holes large enough to "shoot" the temperature through--but that gives a slightly lower reading than the bottom of the case.
Unloaded voltage today is 113.1 so basically every time the roof air cycles the autoformer boosts.
MEXICOWANDERER wrote:
Just as an aside, with a thirty pound transformer with a MERE 15 watt quiescent loss in open air, the laminations get too hot to touch inside of an hour or so. 120+F
myrdracer, offers some good tips. Kudos.