[time-nuts] wwvb weak on east coast especially when the pre-amps under water.

[John Lofgren]

This place has them, plus some other stuff that may be of interest to RF types building outdoor devices:
http://www.sealingdevices.com/products/gore-vents

Unfortunately it looks like you need to ask for a quote, so they may not be open to small orders.

Also, McMaster Carr has an assortment of non-Gore breathers using porous bronze or stainless:
http://www.mcmaster.com/#breather-vents/=hjnav7
Click on the "Breather Vents" in the upper left.



-John


-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On Behalf Of George Dubovsky
Sent: Tuesday, May 15, 2012 7:03 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] wwvb weak on east coast especially when the pre-amps under water.

All,

W.L.Gore and Associates makes a whole line of these things, but I'm not
sure where you go to buy just one.

http://www.gore.com/en_xx/products/venting/protective/index.html?xcmp=ijdgpvmktgurl

73,

geo - n4ua



On Tue, May 15, 2012 at 2:59 AM, Attila Kinali <attila at kinali.ch> wrote:

> On Mon, 14 May 2012 18:01:01 -0400
> Joseph M Gwinn <gwinn at raytheon.com> wrote:
>
> > Modern outdoor enclosures use a filter of some kind, but the underlying
> > principle is the same.
>
> I don't know what other types are around, but we use vents with
> a gore-tex foil over them. Keeps water out but lets the case breath.
> This prevents any pressure build up, which would then start to suck
> watter in from the seal.
>
> Unfortunately, i'm currently unable to find the maker or the type of
> the vent... If anyone is interested in those, i'll can ask around.
>
>                        Attila Kinali
>
> --
> The trouble with you, Shev, is you don't say anything until you've saved
> up a whole truckload of damned heavy brick arguments and then you dump
> them all out and never look at the bleeding body mangled beneath the heap
>                -- Tirin, The Dispossessed, U. Le Guin
>
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