[Boatanchors] Drying out power supplies?

[hwhall at compuserve.com]

I made a cardboard box oven. Single layer box with big towels wrapped outside. An opening at the top for ventilation & to pass the cord to a 60W shop droplight inside. A large thermometer was inserted through the cardboard to monitor temp. After a couple hours the temp stabilized and could be tweaked by adding or removing towels or changing the size of the vent opening. Was kinda easy to get around 100deg.

WayneWB4OGM

-----Original Message-----
From: Richard Knoppow <1oldlens1 at ix.netcom.com>
To: boatanchors <boatanchors at mailman.qth.net>
Sent: Tue, Apr 14, 2020 3:26 pm
Subject: Re: [Boatanchors] Drying out power supplies?

    You may be able to make a drying oven from nested cardboard 
boxes heated with incandescent light bulbs. It doesn't need much 
heat. The boxes should be perforated to allow some ventilation. 
Rob is correct about the moisture from a gas flame.

On 4/14/2020 2:54 PM, Rob Atkinson wrote:
> Two comments:  Gas ovens may add moisture not bake it out.  Gas
> combustion produces H2O and CO2 I believe.  Drying oven should be
> electric.
> But, so far I've never needed to bake anything because I always keep
> my big iron indoors where I run a dehumidifier set to 40% whenever the
> air feels damp.  No problems so far.
>
> 73
> Rob
> K5UJ
>
> On Mon, Apr 13, 2020 at 3:05 PM Gary Hitchner <talgarth at comcast.net> wrote:
>> Thanks for the reply's so far, yes I dimly remember something in the range
>> of 150 F.
>>
>> I checked, it looks like the lowest setting for our oven is 170, so looks
>> like it will work.  The length of time is longer than expected, but thinking
>> about it stored for  20 years, 24 hours doesn't sound so bad.
>>
>>
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-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL

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