Homebrew PCBs

Is tinning necessary? What is the most cost effective way to buy the 
tinning solution and how is it applied? I usually buy bulk if things 
don't have shelf life to worry about.
Thanks,
Dave

On Sat, 24 Nov 2007, Dave wrote:

> Is tinning necessary? What is the most cost effective way to buy the
> tinning solution and how is it applied? I usually buy bulk if things
> don't have shelf life to worry about.

I tin my boards because they look nicer, in the main! (The copper
tarnishes rather fast).

The tinning crystals last a longn time, but made up solution breaks down
after a few months - so make it up in small amounts.

Dylan Smith wrote:
 >
 > On Sat, 24 Nov 2007, Dave wrote:
 >
 > > Is tinning necessary? What is the most cost effective way to buy the
 > > tinning solution and how is it applied? I usually buy bulk if things
 > > don't have shelf life to worry about.
 >
 > I tin my boards because they look nicer, in the main! (The copper
 > tarnishes rather fast).
 >
 > The tinning crystals last a longn time, but made up solution breaks down
 > after a few months - so make it up in small amounts.

Where is the best place to buy the tinning crystals?
Thanks,
Dave

----- Original Message ----- 

From: "Dave" <theschemer@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Saturday, November 24, 2007 4:05 PM
Subject: [Homebrew_PCBs] To tin or not to tin


> Is tinning necessary? What is the most cost effective way to buy the
> tinning solution and how is it applied? I usually buy bulk if things
> don't have shelf life to worry about.

I find the small amount of resist left on the board after cleaning it off 
with IPA stops the tracks from corroding.

Leon
--
Leon Heller
Amateur radio call-sign G1HSM
Yaesu FT-817ND and FT-857D transceivers
Suzuki SV1000S motorcycle
leon355@...
http://www.geocities.com/leon_heller

On Sat, 24 Nov 2007, Dave wrote:

> Where is the best place to buy the tinning crystals?

Really depends where in the world you are - I got mine from RS Components
by mail order. (http://www.rswww.com)

Hi Guys
 I tried your link but got
No results were found for tinning crystals
maybe they are knowen as some other name?

  ----- Original Message ----- 
  From: Dylan Smith 
  To: Homebrew_PCBs@yahoogroups.com 
  Sent: Sunday, November 25, 2007 7:31 AM
  Subject: Re: [Homebrew_PCBs] To tin or not to tin


  On Sat, 24 Nov 2007, Dave wrote:

  > Where is the best place to buy the tinning crystals?

  Really depends where in the world you are - I got mine from RS Components
  by mail order. (http://www.rswww.com)



   


[Non-text portions of this message have been removed]

On Sun, 25 Nov 2007, Craig vk2zcm wrote:

> Hi Guys
>  I tried your link but got
> No results were found for tinning crystals
> maybe they are knowen as some other name?

Try RS catalogue number 567-812

They are a bit expensive though, but 450g should last years if you only
make up a small amount of solution at a time (made up solution doesn't
keep for all that long, best I've got is about 4 months - but the crystals
themselves last for a long time. I keep made-up solution in one of those
expanding photo developer bottles so I can exclude as much air as
possible).

Does anyone know where to get these tinning crystals in the USA?

 

Mark

 

  _____  

From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
On Behalf Of Dylan Smith
Sent: Saturday, November 24, 2007 5:49 PM
To: Homebrew_PCBs@yahoogroups.com
Subject: Re: [Homebrew_PCBs] To tin or not to tin

 

On Sun, 25 Nov 2007, Craig vk2zcm wrote:

> Hi Guys
> I tried your link but got
> No results were found for tinning crystals
> maybe they are knowen as some other name?

Try RS catalogue number 567-812

They are a bit expensive though, but 450g should last years if you only
make up a small amount of solution at a time (made up solution doesn't
keep for all that long, best I've got is about 4 months - but the crystals
themselves last for a long time. I keep made-up solution in one of those
expanding photo developer bottles so I can exclude as much air as
possible).

 



[Non-text portions of this message have been removed]

--- In Homebrew_PCBs@yahoogroups.com, Dave <theschemer@...> wrote:
>
> Is tinning necessary? What is the most cost effective way to buy the 
> tinning solution and how is it applied? I usually buy bulk if things 
> don't have shelf life to worry about.
> Thanks,
> Dave
>

I do not tin my boards.  I use the positive method using the MG 
Chemcials 600 series boards.  I leave the resist on, you do not have 
to remove to solder.  I also once I have loaded the board spray the 
bottom with clear laquer.  The clear laquer would also work well if 
you do TT method as it will seal the copper.

--- In Homebrew_PCBs@yahoogroups.com, Dylan Smith <dyls@...> wrote:
>
> On Sat, 24 Nov 2007, Dave wrote:
> 
> > Where is the best place to buy the tinning crystals?
> 
> Really depends where in the world you are - I got mine from RS 
Components
> by mail order. (http://www.rswww.com)
>
 
Also try Allied Electronics www.alliedelec.com or Mouser www.mouser.com
they both carry some of the MG Chemical products.  I don't do the 
Tinning myself anymore so it has been a long time since I have bought 
any.

Ben

--- In Homebrew_PCBs@yahoogroups.com, "Ben" <bhleavi@...> wrote:
>
> --- In Homebrew_PCBs@yahoogroups.com, Dylan Smith <dyls@> wrote:
> >
> > On Sat, 24 Nov 2007, Dave wrote:
> > 
> > > Where is the best place to buy the tinning crystals?
> > 
> > Really depends where in the world you are - I got mine from RS 
> Components
> > by mail order. (http://www.rswww.com)
> >
>  
> Also try Allied Electronics www.alliedelec.com or Mouser 
www.mouser.com
> they both carry some of the MG Chemical products.  I don't do the 
> Tinning myself anymore so it has been a long time since I have 
bought 
> any.
> 
> Ben
>

Another one you can try is Circuit Specialists, Inc. 
www.web-tronics.com


Ben

Does anyone know where to get these tinning crystals in the USA?

Mark

Mark,
I found these 2 places. The second place is slightly cheaper but they 
are out of stock until the 27th of Nov which is just a few days away.
Dave

http://www.allelectronics.com
http://www.partsexpress.com/pe/showdetl.cfm?Partnumber=340-188
> ,_._,___

Leon wrote:
 >
 > I find the small amount of resist left on the board after cleaning it off
 > with IPA stops the tracks from corroding.
 >
 > Leon

I don't know if it matters but I plan on using the Gootee method so I 
just ordered some tinning crystals to be safe. If I don't feel the need 
to use them I can do without later. I am just getting my materials in 
order before I start.
Dave

The tinning solutions all seem to contain pretty nasty chemicals, so
take appropriate care.

There is also hot tinning, or coating with various other stuff as alternative.

ST