In companies I have worked for cleaning circuit boards was mainly a cosmetic
requirement and made it easier to see circuit trace faults. It also
prevented other debris from sticking to the boards. It is good to clean at
extremely high impedances partly because of a 'suspicion' of leakage through
the flux residue but also as above to it did not hold other leaky debris;
after which it would be coated. As I recall, the MIL specs do not require
cleaning unless aggressive fluxes are used, I'll have a look when I get a
few spare ms.
----- Original Message -----
From: "Steve Thompson" <firstname.lastname@example.org>
Sent: Wednesday, July 11, 2007 10:44 PM
Subject: Re: [Amps] Fwd: Weighing In On Solder Water Wash Flux
> jeremy-ca wrote:
>> I worked in microwave R&D from 1997 to 2003 when I retired.from industry.
>> Never saw water flux at any of those companies.
> For at least 10 years all the solder wire I've bought for assembly work
> has had 'no clean' flux that leaves a tiny transparent residue that can
> remain in place - maybe not for high uW or serious QRO, but for all
> normal soldering it's fine. I have a bottle of old Kester flux if I need
> to tin rusty iron or tarnished copper.
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