I actually have three American Harvest dehydrators. One is a "Mold
Machine" the other is the main one which I have used for years and I
bought a larger one last summer for the Mt. St. Helens 14" reel seismic
tapes--though you must de-flange the reel to make it fit. Pity.
Anyway, this picture is a sample that I saved, but I do run tests on my
dehydrators with recording thermometers to see how they work.
I've seen a lot of nasty eBay stuff (and lots of good stuff), but I'm
not certain I'd trust a thermostat or controller in a lab oven that's
meant to go to much higher temperatures any more than (or perhaps not as
much as) the food dehydrator. I suspect that if the food dehydrator
thermostat stuck on, there there is a fusible link in there some where
to get its UL label, though I have not dissected one.
I think staying within a 2.5 °C window (not plus/minus--that's
plus/minus 1.25 °C) is pretty good and all you need for tape baking.
That's about +/- 2% Celsius and I hate to think what it is in
Kelvins...perhaps +/- 0.006%?
On 2012-02-19 7:57 PM, Tom Fine wrote:
> By the way, the American Harvester dehydrator is quite "repeatable" as
> far as producing playable tapes, many times over many years. Results
> speak for themselves. But again, horses for courses. There are more
> expensive and complex ways to skin the same cat.
Richard L. Hess email: [log in to unmask]
Aurora, Ontario, Canada (905) 713 6733 1-877-TAPE-FIX
Quality tape transfers -- even from hard-to-play tapes.