From: pcdhSpamMeSenseless@electrooptical.net   
      
   On 01/29/2018 09:06 AM, George Herold wrote:   
   > On Monday, January 29, 2018 at 8:56:13 AM UTC-5, Phil Hobbs wrote:   
   >> On 01/27/2018 03:36 PM, Ian Field wrote:   
   >>>   
   >>>   
   >>>  wrote in message   
   >>> news:1c86a3ef-5b3d-400f-88b4-207556eb17e2@googlegroups.com...   
   >>>> On Sunday, January 7, 2018 at 1:21:58 PM UTC-5, Ian Field wrote:   
   >>>>> "Andy K"  wrote in message   
   >>>>> news:ec18876d-124e-41cd-8b33-bc56195ecfdc@googlegroups.com...   
   >>>>>> On Saturday, January 6, 2018 at 2:05:38 PM UTC-6, George Herold wrote:   
   >>>>>>> On Saturday, January 6, 2018 at 12:37:47 AM UTC-5, Andy K wrote:   
   >>>>>>>> I having been using Oatey solder paste when soldering large   
   >>>>> diameter   
   >>>>>>>> wires.   
   >>>>>>>> I know it's designed for copper pipes.   
   >>>>>>>>   
   >>>>>>>>   
   >>>>>>>> Is there something better?   
   >>>>>>>>   
   >>>>>>>> Thanks,   
   >>>>>>>>             Andy   
   >>>>>>>   
   >>>>>>> Ughh, OK I did that when I was starting out, and promptly   
   >>>>>>> was 'talked to' by an older tech.  The problem with the acid   
   >>>>>>> pipe solder is you have to get it all off, with water or something,   
   >>>>>>> (just like when you do copper pipe plumbing.) otherwise it corrodes   
   >>>>>>> over time and your pcb/circuit turns into this ugly green thing.   
   >>>>>>>   
   >>>>>>> As Phil said get some rosin core solder/flux.  You can also buy   
   >>>>>>> rosin flux in a little jar. (snuff box size.)  I use that for   
   >>>>>>> tinning bigger wires.   
   >>>>>>>   
   >>>>>>> George H.   
   >>>>>>   
   >>>>>> Ok, that makes sense.   
   >>>>>>   
   >>>>>> I only used it on large gauge wires and never on circuit boards.   
   >>>>>   
   >>>>> Fluxite brand paste is less aggressive than plumber's flux, but its   
   >>>>> grease   
   >>>>> based and cant be washed off with water.   
   >>>>   
   >>>> Is there a type or brand that is water soluble?   
   >>>   
   >>> There was a water based liquid flux, all I can remember is the can was   
   >>> red and beige.   
   >>>   
   >>> Its more aggressive, but that might not matter when you can wash it off.   
   >>>   
   >>> AFAIK: all PCB fluxes have to be water soluble since ozone layer   
   >>> legislation banned the cleaning solvents - might be worth seeking out   
   >>> which one is strong enough.   
   >>   
   >> Umm, no.  Leaded processes with rosin flux and solvent clean are readily   
   >> available, at least over here.  I use them exclusively.   
   >   
   > Hey you should walk on the wild side sometimes.  Water based flux is fine   
   > for low impedance stuff. (~<1 Meg ohm).  It's fast and cleans up nicely.   
   >   
   > What do you use to clean off rosin?  Or are you having someone else do it?   
      
   When I'm doing it I usually leave the flux where it is, because it   
   doesn't cause any big problems.  (I use slots underneath high-value   
   resistors in the signal chain.)   
      
   For production (or what counts as production for us, i.e. 10-50 boards)   
   I let the vendor worry about it.  I haven't had any problems with either   
   PNC (Nutley NJ) or PCBway (Shenzhen China).   
      
   Cheers   
      
   Phil Hobbs   
      
   --   
   Dr Philip C D Hobbs   
   Principal Consultant   
   ElectroOptical Innovations LLC / Hobbs ElectroOptics   
   Optics, Electro-optics, Photonics, Analog Electronics   
   Briarcliff Manor NY 10510   
      
   http://electrooptical.net   
   http://hobbs-eo.com   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)