[volt-nuts] Sn10Pb90

[Volker Esper]

Sorry, Joe, if my question was mistakable. I wanted to know your 
application. Maybe I'd recommend not using a special solder alloy rather 
than going the long way of aquiring it.

I give you an example: When fixing a 6.5 digit DMM (HP34401A) I wasn't 
sure if I might use a special alloy to solder the pins of an input 
relay. In the end I did not. Comparing this fixed unit to a second one 
in several automated 24 hours tests with varying room temperatures, 
there seem to be no measurable differences between the two. So in this 
case it appears to be of no great importance using a special solder.

Enthough the thermoelectric voltages at these pins are not negligible 
and therefore have to be considered, other effects obviously are of much 
more effect. So, as I mentioned, using a special soldering alloy drops 
in the priority list.

Now, that I'm curious, please let us know, what you are using the solder 
for.

Volker
DF9PL


Am 12.08.2013 15:06, schrieb Joseph Gray:
> As I asked in my original message, I'm trying to find out where I can buy a
> small quantity of rosin-core 10/90 (tin/lead) solder. I don't want to buy
> it in bar form from China.
>
> Joe Gray
> W5JG
>
>
>
> On Mon, Aug 12, 2013 at 3:17 AM, Volker Esper<ailer2 at t-online.de>  wrote:
>
>    
>> sorry, spelling mistake:
>> "What do you _want_ it for?"
>>
>> Remember, those solder alloys are optimized for a specific alloy
>> combination only, e.g. Cu-Cu.
>>
>> Volker
>>
>>
>> Am 12.08.2013 10:39, schrieb Volker Esper:
>>
>>
>>      
>>> Hi Joe,
>>>
>>> What are you looking for, Cadmium-Solder, or Sn10Pb90, which is
>>> Stannum/Plumbum-only?
>>>
>>> And what do you what it for? In (very high) precision applications there
>>> are so many issues to consider that the solder doesn't appear to be at a
>>> high priority...
>>>
>>> Volker
>>>
>>>
>>> Am 12.08.2013 00:38, schrieb Joseph Gray:
>>>
>>>        
>>>> Reading through the archives, I saw that there was some discussion about
>>>> a
>>>> safer alternative to cadmium-based solder. The low tin, high lead alloy
>>>> was
>>>> recommended as a good low-thermal EMF substitute. However, I did not see
>>>> any recommendations on where to buy some of this.
>>>>
>>>> I just did some searching and all I come up with is bar solder, mostly
>>>> from
>>>> China. Where can I buy a small quantity of rosin-core 10/90 solder?
>>>> Mouser,
>>>> which is my preferred vendor certainly didn't list any. I would think
>>>> that
>>>> even 1/2  pound would last me a lifetime.
>>>>
>>>> Joe Gray
>>>> W5JG
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