Does flux affect a circuit?

[Flatpicker]

There?s also a type of rosin that you don?t have to clean. I don?t use it, though ? looks too ugly!

 

[CJ]

You can Google (jeez, those billionaire punks, did you see them on 60 minutes in the hot tub together? they live right down the street)
up a ton of info on flux and the problems it can cause. Mostly leakage currents.

 

[vertiges]

Hi,

Little question here : when I clean the flux on the PCB (I use Kester solder with rosin) with isopropylic alcohol, I get in some places, around of the "solder points" white residues... it looks like salt to me... Is it normal ?
Have I to keep cleaning until those white residues disapear ?


Thank you,

eD)))

 

[vertiges]

Anyone ? :roll:

Thanks,

eD

 

[Andy Peters]

[quote author="vertiges"]Hi,

Little question here : when I clean the flux on the PCB (I use Kester solder with rosin) with isopropylic alcohol, I get in some places, around of the "solder points" white residues... it looks like salt to me... Is it normal ?
Have I to keep cleaning until those white residues disapear ?[/quote]

Sounds like you're using 70% rubbing alcohol, which has a lot of water. When the alcohol evaporates the impurities in the water remain.

Try cleaning the board with a solution of Detergent 8 or Luminox and deionized/distilled water. Get a 1" wide or smaller paint brush and cut off all but about 1/4" of the brush length. Use that brush to really scrub with the detergent. When the board is clean, rinse with deionized water and dry with shop air.

-a

 

[vertiges]

[quote author="Andy Peters"]

Sounds like you're using 70% rubbing alcohol, which has a lot of water.

-a[/quote]

Yes indeed... I though 70% was correct. I'll buy 99.9 %

Thank you very much for your answer. Very instructive !

eD)))

 

[CJ]

Rodger, NK Technologies, current sensors.

 

[rafafredd]

Really, I HATE all this audiophools, but I do have to say that I´ve heard a BIG improvement by changing a tube socket in a ELAM251 mic. There were two mics. One sounded much better than the other. So, we´ve changed the tubes, than the capsules, and even the housing, but the difference was in the tube sockets. So, go for ceramic ones for tube mics! So, I bet you does can hear the flux if it´s between the capsule and the tube...