Trying Out the Rossmann Flux

RE: Trying Out the Rossmann Flux

pseakins — Thu, 16 Sep 2021 00:22:07 GMT

You're saying that "it's not compatible with leaded solder". I am pretty sure that is incorrect as Louis always replaces the unleaded solder on the repairs with leaded solder before cleaning the joints. Unleaded solder is a big bone of contention with him as it causes lots of unnecessary equipment failures.

RE: Trying Out the Rossmann Flux

jw0752 — Sat, 09 Feb 2019 05:56:09 GMT

I am eager to look over your shoulder and learn from your experiments.

John

RE: Trying Out the Rossmann Flux

baldengineer — Sat, 09 Feb 2019 00:38:45 GMT

Do you have any experience with ChipQuik SMD291? I am curious how the Amtech compares to ChipQuik. (Is there any significant difference?)

I've been working with SMD291 recently and found the jelly-like viscosity to be a huge help. It's so much easier to get flux into tight pitched ICs. While it works fine for pencil soldering, I found the way its surface tension holds a bubble shape means it starts boiling before the tip comes in contact with metal. I'm not sure if that is good or bad, but it is different from my experience with liquid flux.

For surface mount parts, it works fantastic. Even with liberal usage, I don't feel like my syringe is moving at all.

I've also found it is fantastic to soak into solder wick for de-soldering tasks. Compared to liquid flux, the jelly soaks into the weave so much better.

Anyway, I'm very curious to see your experience and maybe compare notes.

RE: Trying Out the Rossmann Flux

fmilburn — Fri, 08 Feb 2019 18:03:31 GMT

I am frequently guilty of forgetting to or using too little flux. Looking forward to your findings on the paste.

RE: Trying Out the Rossmann Flux

Jan Cumps — Fri, 08 Feb 2019 15:16:03 GMT

I've purchased this from a garage sale (5€) with as only reason to scavenge some components and use the PCB to train my solder rework skills.

[View:/resized-image/__size/620x465/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-39df1624-cc06-4593-a1a8-7754faa43bcf/contentimage_5F00_190082.png:620:465]

The display's flex connector is soldered onto the main PCB. I will not be able to recover that.