[time-nuts] Vaperware Parts and pulse stretching circuits

[Bob kb8tq]

Hi

For around $10, you likely can get a stencil with your board order. Screening
solder on the board can be set up with masking tape and a few scrap boards 
as “stops”. With the solder paste already in the correct locations, there is a lot
less need for messing around. The board can be reflowed with a toaster oven…

No, none of that is anything I came up with myself. One of the guys at work was
into doing it this way. He ran me through the whole thing. Much easier than the
alternatives. 

Bob

> On Apr 25, 2020, at 4:04 PM, ASSI <Stromeko at nexgo.de> wrote:
> 
> On Samstag, 25. April 2020 16:24:35 CEST John Moran, Scawby Design wrote:
>> As a few others have pointed out on this thread, there are some simple
>> methods of soldering fine-pitch devices. I use the one already mentioned
>> that can be done with a clunky soldering iron, some solder-wick and a low
>> power desk lamp magnifier. Oh, and some solder.
> 
> Don't flood that much solder onto the pins, that takes way too much time to 
> clean up and may be outright impossible to fix on a more densely populated 
> board.  The "right" way to do that type of work is to apply flux liberally 
> after having tacked down at least two corners, then steadily drag a blob of 
> fresh solder along the pins.  The solder blob stays on the iron, it takes just 
> a little bit of practise to learn the best speed of dragging (too fast and the 
> solder won't wet the pins, too slow and you get bridging and puddling).  If 
> you have a little bit of bridging here and there, let the part cool down 
> before cleaning up.  I never use solder wick for that.  If it's a multi-layer 
> board with lots of metal you will need to warm it up on a hotplate or with an 
> hot-air gun set to 120…150°C.
> 
> 
> Regards,
> Achim.
> -- 
> +<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+
> 
> Samples for the Waldorf Blofeld:
> http://Synth.Stromeko.net/Downloads.html#BlofeldSamplesExtra
> 
> 
> 
> 
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