cleaning the boards

[Al Waschka]

Bob wrote:
>
> I stopped defluxing boards years ago.  Not worth the trouble and in most
> cases the cleaning mechanism, while making the board "Pretty" to look at,
> merely spread tiny particulates all over the board and made a nasty long
> term mess to deal with. ...

I thought I'd relate my experience with flux residue.  My Yaesu FT-101
had an audio circuit with extremely high impedance.  I don't remember
the exact details, but I think it was in the VOX relay area.  Yaesu
didn't believe in defluxing boards, either.  One day the VOX quit
working.  I traced the problem to no charging of the capacitor.  I
measured the resistance across the capacitor and it was a few hundred K
ohms.  I cleaned off the flux on the board and it went up so I couldn't
measure it any more (years aog, old analog VOM) and the VOX started
working.

There are areas where cards should be cleaned.

P. S.  Your friendly local electronics store probably has a can of GC
deflux and cleaning agent.  Be careful, it attacks many plastics.

73,

Al K5TAN

Sponsored by the City of Tempe 

Listserver Submissions:  heath at listserv.tempe.gov
Listserver Subscription: listserv at listserv.tempe.gov - "subscribe heath 'name' 'call'"
Listserver Unsubscribe: listserv at listserv.tempe.gov - -"signoff heath"