[Milsurplus] Water, Water Everywhere.

[John Hutchins]

As seen on Amazon :
Eva-Dry E-333 Renewable Wireless Mini Dehumidifer  19.95

DampRid FG83LV Hanging Moisture Absorber Lavender Vanilla, 3-Pack these 
are also wireless but not renewable }
Hutch

On 12/11/2015 4:48 PM, Bill Carns wrote:
> What you are talking about is getting the moisture to diffuse back out of
> whatever material it has gone into that you are unhappy about. The results
> will depend directly on the differential (in this case) humidity between the
> internalized environment and the external (air) environment. The diffusion
> is, as you have suggested also a function of temperature as is almost any
> diffusion rate.
>
> So.....you need to do two things to have any significant impact.  I suggest
> building a "Dry box" by making some kind of moisture impervious container
> and then putting a small dehumidifier in there. Then, as you suggested, also
> heat it moderately so as not to damage the rig, components or the box.
> There is a real nifty and cheap device that is sold at coops where they
> handle poultry supplies. It is just a plug in outlet that has a thermostat
> on it. They are not very expensive.  The real cheap ones are fixed temp and
> set to maintain just above freezing. The adjustable ones can be set to go to
> a higher temp.  OR, you can just make your own.  Bottom line is you need
> controlled heat and low humidity.
>
> Re the temp, Most components can handle 50 deg C.  This equates to just over
> 120 deg F.   Watch out for plastics.
>
> Whether it will work depends on how much damage has been done in the form of
> corrosion and modifying the molecular structure of the material.
>
> Good luck and I also have rigs long stored and grimace when you bring this
> up. One of them is a real nice TCS set.
>
> Bill
> N7OTQ
>
> -----Original Message-----
> From: Milsurplus [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of
> David Stinson
> Sent: Friday, December 11, 2015 10:43 AM
> To: milsurplus at mailman.qth.net; boatanchors at mailman.qth.net
> Subject: [Milsurplus] Water, Water Everywhere.
>
> Many of our beloved old radios have been sitting, cold and quiet for many
> decades.
> Some of them getting close to a century.
> Recently, I've been dealing with bakelite and phenolic in our sets which
> have taken-up moisture over the years.  Right now on the bench I have a TCS
> receiver in which one of the pins of Z202, an IF transformer, is leaking B+
> to ground through the phenolic.  Pulling an IF from a TCS is a pain but
> do-able.
> So may we discuss ways to gently drive moisture from our sets?  I can "get
> rough" in the stove with those bakelite inserts in WWII radio connectors but
> that won't do for a whole set.  I've tried powering just the filaments and
> leaving a set for a couple of days but I don't think they get hot enough to
> do much good.  Heat lamps can do some damage.
>   What have you done?    I'm thinking of light bulbs
> with the radio in a thick cardboard box, *outside* in case the box decides
> to catch fire or something.
>
> 73 Dave AB5S
>
>
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> .
>