[R-390] re: Dangling PTO

[Kenneth G. Gordon]

On 19 Aug 2006 at 20:20, Al Parker wrote:

> "WARNING" about breaking the seal, somebody's probably done it anyway,
> and even if not, the desiccant is long past it's usefulness, and I
> haven't been able to reclaim it ever.

Hello again, Al:

I used to work with a seismic outfit that had one of the USGS's World 
Wide Seismic Stations in a concrete vault in a canyon in Montana.

Periodically, it would get really wet in there, depending on the time of 
year.

We bought several hundred pounds of dessicant surplus, sewed up 
some muslin bags to put it in, and spread it around in the vault when we 
needed to.

To reactivate it, we simply put it in an industrial oven set somewhat 
below the burning point of muslin, I think it was about 200 degrees F, or 
maybe a bit more. We would have to ventilate the oven, of course, to 
remove the moisture as it was given off by the wet dessicant.

It would generally take at least overnight, but it would always reactivate 
just fine.

Why won't the stuff in the PTOs reactivate?

Ken W7EKB