I have tried a lot of different solder pastes, and have been most
happy with what I got from Chip Quik. Currently, I'm using a syringe
of SMD291AX (Sn63/Pb37 No-Clean T3 Solder Paste)
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On 2/16/2019 10:13 AM, Steven Weber
If the paste is too cold it doesn’t flow
very well. My paste starts out at about 50 degrees due to the
fact I don’t heat the room until I need to work in it. So I
hold it over the electric space heater for a little bit as I
warm the room up enough to work in. Then my hand keeps it warm
enough as it put down the paste.
I also find I have to poke a wire up into
the syringe once in a while to get the flux to mix back up
into the lead/tin balls.
Try that and see if it helps.
73, Steve KD1JV
I started on my SB II last night - or tried
to, only to find that the paste I ordered is too paste-like
and not "liquidy" enough to be applied to the board. Instead,
it pulls away with the syringe rather than adhering to the pad
I try applying it to. FWIW, this is the paste I ordered:
There must be something out there with a bit less viscosity.
The one part currently on the board is Q2, put there with
standard soldering methods (a small-tipped iron).