Favorite PCB cleaners

A.

ce is

hey

"The Journey is the reward"

eff.com

Perhaps you're thinking of "denatured" alcohol? Rubbing alcohol is, I believe, isopropyl which is already poisonous.

Booze has a better lobbyist!

Maybe if they were to call it rosin liqueur..

Best regards, Spehro Pefhany

Anybody try to clean something with E85 ?

Greg

I certainly am no expert, but this method seems likely to create some problems:

See it to believe it. Dave

Back in the days of Tektronix "mainframe" scopes, the 545 types, the first thing a Tek service site would do was to wash out the scope with detergent and water, then bake it dry.

Bob Pease claimed that boards got really clean run through a dishwasher with Calgonite. Most PCB assembly done nowadays ends with a water wash.

Oh my. Reminds me of my flood. I had a bunch of electronics in the driveway, hosing them off with garden hose. Better than muddy stinking water.

Greg

It is quite obvious that "what is clear to you" amounts to gibberish.

F*ck off. It is obvious you are already brain dead.

Those trimpots probably worked better before washing.

Cheers

Phil Hobbs

we did it in highschool with

pure ethanol glaceal acetic acid and concwntrated sulphuric acid

I'm sure the OP has enough experience to realize that I was providing general advice not precise work instructions - drying the board after rinsing is a good plan and it is kind of you to remind us of that.

In the same helpful spirit I suggest that the good Karma you have gained by making a helpful suggestion might well have been cancelled out by the bad Karma resulting from your aggressive and profane language.

Michael Kellett

The grungy fingerprints made it go down to 7e13 ohms, but overnight it went up, pinning the 1e14 range again. RH is 39%.

Cool, thanks for all the information John!

We have one that's could accept PCBs up to perhaps 4"x6", so big enough for any prototype board I'm likely to do, if not production boards (that would generally be contract manufacturers).

My PPOE had one that was roughly half-desktop sized... it could take boards at least a foot square. Nice stuff, but expensive to keep full of chemicals too, unfortunately.

Thanks, I appreciate that!

---Joel

gregz wrote in news:1987271351353819793.684050zekor- snipped-for-privacy@news.eternal-september.org:

that contains 15% gasoline? not a good idea....

gregz wrote in news:1553076975353821168.167597zekor- snipped-for-privacy@news.eternal-september.org:

While at TEK,I used to put entire scopes into our wash rack and spray them down with water and Kelite,a commercial degreaser. then rinse them with water,and into the drying oven for 3 days minimum. Customers used to bring us equipment that had been in a fire-damaged building just to get them cleaned off.

there there were the tobacco-stained stuff...YUK. I even got a scope from a tobacco company,it had enough tobacco powder in it to roll a cig! gross.

I lowered a small PCB into the vapor zone of our Baron-Blakeslee cleaning machine, above the boiling solvent tank. The board got warm with no apparent condensation at all. There was a little brief condensation onto a high-mass part, an HD15 connector.

We use this machine in the dunk-and-spray mode, so maybe it doesn't make vapor the way some others do. But the thermodynamics seems to work the way I expected, namely you won't get much condensation onto a low specific heat, high surface/mass thing like a PCB.

I'm not surprised, but real vapour degreasers have cooling coils at the top to manage the vapour temperature gradient, iirc. You really do get continuous solvent condensation on the part for as long as it's in there.

Cheers

Phil Hobbs

Oh, ours has that, refrigerated coils and a catch tray that dumps the distillate into the clean tank. That keeps us from losing too much of the ~~$100 per gallon solvent.