On Sun, 15 Oct 2017 01:36:13 -0400, Bill wrote:
> On Sun, 15 Oct 2017 01:36:55 -0000 (UTC), bob prohaska wrote:
>
>> It seems as if correction fluid might be a pretty good bet. Near as I
>> can tell the pigment is titanium dioxide, which is a fairly inert
>> ceramic. It can be applied thick, perhaps it'll resist flux. Shouldn't
>> be too hard to set up a rehearsal with some scrap brass for a test.
>>
>> Speaking of setup, holding the parts in position looks rather difficult;
>> the broken tab is only about 1/8" square. Can anybody suggest some sort
>> of putty that will resist brazing heat, hold the (very small) parts in
>> place and not sinter to something indestructible when heated? Maybe
>> glazier's putty, but that can get rather hard. Fire stop caulking?
>> modeling clay? Perhaps something made from household chemicals like
>> talc and water?
>>
>> Thanks for everyone's ideas!
>>
>> bob prohaska
>
> We used a soldering investment - something like this:
>
https://whipmix.com/products/soldering-investments/
>
> Soldering investment can be used in very creative ways to make an
> "index" that would hold your parts in a predermined relationship while
> the actual brazing is done.
that you might be able to modify/adapt to fit your needs. It shows it
all. They're using hard, high strength, gold solder/braze. The brazing
temp is not far below the melting point of the gold being used.
solder can leave.