Re: RD16HHF1 in the uBITX #ubitx
Looks fine. Mine is from Michael's rated at 360w.
It was $20. WalMart might even be cheaper. They're probably all
nearly identical. Mine looks like the one you show except for
packaging details. BTW, it's super for heat shrink tubing too.
You control the heat with the distance from the
piece. I start out about a foot away to get the board warmed up
to a point where I don't want to touch it, Keep the end moving.
Watch Cash's video that I link to earlier. It's really that
Don't get too close to the part while the solder paste is still grey. There's a point where the solder paste starts getting a little glossy and slick. You can blow the part right off the pads if you get too aggressive. For that matter, I often tape smaller PCBs down as they can scoot around from the air flow too. Then it's magic. The solder turns silver, the part aligns itself right on the pads better than you did, and it's a thing of beauty.
On very tiny parts, say ones with 0.5 pitch pins,
you can get solder bridges. Don't worry about them. A light
touch with solder wick and a soldering iron and they disappear
leaving the part perfectly soldered in place. On many tiny parts
with lots of legs, I just lay down a running blob of solder that
shorts all the pins together, then wick up the excess. I did
about a dozen AD9850s that way. All perfect.
I understand some guys have tremors and other things that would make SMT difficult. It takes a steady hand to place the parts but not nerves of steel. I suspect anyone who can walk from the kitchen to their workbench with a full cup of coffee without spilling any could manage the larger SMTs without difficulty.
SMTs open up a whole new world of kit building
and homebrew possibilities. They aren't limiting our abilities
at all. We're doing that to ourselves.
On 2/20/2018 9:21 PM, VE7WQ wrote: