<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Thanks !!</div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature">I'm gonna get one eventually ! It went on my wish list <br><br>Sent from my iPhone</div><div><br>On Oct 23, 2015, at 7:24 PM, Videotron <<a href="mailto:tokalo@videotron.ca">tokalo@videotron.ca</a>> wrote:<br><br></div><blockquote type="cite"><div><meta http-equiv="content-type" content="text/html; charset=utf-8"><div>Many moons ago I took a break from electronics to look after my health - which basically meant being away from the bench and outdoors. When I did get back I researched fume extraction filters - the expensive ones. I decided on the OKI BVX-101 Hepa filter with arm plenum that I can direct to the work. I recently sold it to a gent but would but another one when I become active -at the bench that is- again. Not as noisy as bathroom fans and don't freeze my tootsies off in the winter either with the dryer duct hose method I had before. </div><div><br></div><div>Good health everyone.</div><div><br></div><div>Tony K</div><div><br>On Oct 23, 2015, at 6:48 PM, Jason Proctor <<a href="mailto:jason@redfish.net">jason@redfish.net</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr">i must confess to using the Paul Schreiber method for soldering - i use organic water washable flux for most board components and then regular stuff for wiring and anything mechanical.<div><br></div><div>dumping the organic flux down the sink isn't particularly enviro friendly, for sure. however, i do find the populated boards very tidy and clean, and easy to examine for issues.</div><div><br></div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Oct 23, 2015 at 3:41 PM, Richie Burnett <span dir="ltr"><<a href="mailto:rburnett@richieburnett.co.uk" target="_blank">rburnett@richieburnett.co.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">---- Tom Wiltshire wrote ----<br>
<span class="">><br>
> Do I *really* *actually* need to worry about any of this stuff?<br>
<br>
</span>The only time I've actually seen a problem that was traced back to poor flux cleaning was around a 32.768kHz watch crystal that had been manually replaced on a large batch of boards made for a company where I worked. The real-time clocks in all of the product that was shipped to Asian markets started to fail in the humid season. Other world markets were unaffected. This was apparently due to flux residue absorbing water from the humid atmosphere, forming a conductive path with salts present in the flux and damping the crystal enough to stop oscillation.<br>
<br>
This happened on hundreds of boards, so it is a real phenomenon, and the ensuing recall and rework was very costly for the company.<br>
<br>
High impedance nodes are most susceptible to stay leakage paths, like the low-power watch crystal in this example, or something like an analogue sample and hold circuit.<br>
<span class="HOEnZb"><font color="#888888"><br>
-Richie,<br>
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