[R-390] Filters

[Bob Camp]

Hi

About the furthest I would go is to put it in a warm (but not hot) oven overnight after you seal one end. You need an oven you can *trust* to control to ~ 85 C / 185 F.  That will drive out most of the residual moisture. What ever you use for support is likely to have a bit of moisture in it ….

A couple of minor things that are worth doing. 

1) Clean off *all* of the flux from any solder joints. Flux and fine gauge wire - not a good thing long term.
2) A dot of electronic grade RTV on any fine gauge junctions will increase their life expectancy quite a bit. It must be electronic grade since the normal stuff has acetic acid in it.
3) Check all the pins to ground with a good ohm meter  *before* sealing things up.

Bob

On Feb 17, 2013, at 11:23 AM, quartz55 <quartz55 at hughes.net> wrote:

> Well, this may be the time of year to do filters.  Humidity is around 35% inside right now.  I'm not even going to try to evacuate it.  It's going to be used inside and if anyone wants to use it in the frigid weather, they will have to deal with it.  I suppose getting it warmed up before sealing it would drive out most of the moisture, but not like evacuating and sealing it.  All I have anyhow is one of those wine bottle pumps.  I can see why these things are expensive, there's a lot more to it than putting a bunch of wires together.
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