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Old 24th February 2017, 06:38 PM   #1
Elvee is offline Elvee  Belgium
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Join Date: Sep 2006
Default A DIY micro-tinning bath

Hi there,

It is an idea I toyed with for a long time, but this time, I actually made it.

I need a very small tinning bath, because my "complex" digital prototypes are wired using the émafil technique:

Click the image to open in full size.

Until now, I was tinning the wire ends with a soldering iron, but a bath is much more practical.

Here is a description of my build.
I started with a 82Ω 7W vitrified WW resistor, heat-resistant cable and tubing, a bit of non-woven fiberglass sheet, a 6mm metric bolt made of stainless steel (important), a piece of thin-walled stainless steel tube and a stand.

Click the image to open in full size.

The end of the bolt has its diameter reduced to 5mm for a 7mm length, to allow the insertion into the resistor.
The assembled thing looks like this:

Click the image to open in full size.

Here it is in action, fed by a 30V DC supply:

Click the image to open in full size.

Afterwards, I found that I could protect the solder surface from oxidation using a mix of sodium borate and boric acid: they form a brittle and crumbly crust that is easily penetrated by a wire, even a thin one.

Click the image to open in full size.

There are probably more suitable compounds, but it is a good beginning
Attached Images
File Type: jpg Emafil.jpg (362.6 KB, 49 views)
File Type: jpg Tbath1.jpg (277.9 KB, 48 views)
File Type: jpg Tbath2.jpg (121.2 KB, 48 views)
File Type: jpg Tbath3.jpg (307.5 KB, 48 views)
File Type: jpg Tbath4.jpg (238.8 KB, 48 views)
. .Circlophone your life !!!! . .
♫♪ My little cheap Circlophone© ♫♪

Last edited by Elvee; 24th February 2017 at 08:05 PM.
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Old 24th February 2017, 06:59 PM   #2
RM is offline RM  Norway
diyAudio Member
Join Date: Apr 2005
Location: Buskerud
What an unimaginable mind. I salute you.

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