[R-390] re: Dangling PTO

[Cecil Acuff]

I have been making a habit of just cutting the strings loose and removing 
the bag.  If it ever gets loose inside the PTO it's a real mess.  My radio's 
are kept in an air-conditioned shop anyway.  I think the idea was along the 
lines of the MFP coating used on the earlier SP-600.  Just in case one ended 
up in a jungle environment....also I'm sure the Navy's were not in humidity 
controlled compartments when on a cruise...  We don't have to worry about 
that type of exposure with most of these surplus units.  I would guest they 
are living the easy life at this point.

Cecil...
----- Original Message ----- 
From: "Kenneth G. Gordon" <kgordon2006 at verizon.net>
To: "Al Parker" <anchor at ec.rr.com>
Cc: <R-390 at mailman.qth.net>
Sent: Sunday, August 20, 2006 9:08 AM
Subject: Re: [R-390] re: Dangling PTO


> 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
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