It sounds like we use the same
About the only thing I use solder paste on is QFN packages if the
pads are too small
for hand soldering to allow some wicking. And then I use a
cheap hot air gun I picked up at a garage sale.
The tray is a good idea surface mount of through hole.
I have used both a good microscope and a head magnifier to see
My back prefers the scope. They're a little pricey, but once you
you'll get spoiled quickly. I've seen some inexpensive video
I've been tempted to try. It would be nice to be able to work
On 4/26/2018 7:37 AM, ajparent1/kb1gmx wrote:
If it gets hot
enough to melt the low temp you have issues... 137C is 278F,
I used the nominal lead material Kester-44 63/37. I have that in
.015, .030, .040 diameters
as its just handy.
Seriously the only place where there is any heating of
significance is the final transistor.
That said I really hate the non-led solders they do not make good
looking joints. I soldered my
si5351 down using Kester-44 63/37 in .015 diameter. It was the
flood (aka don't sweat bridges)
then clean(flux impregnated silver braid from RG316) up
technique. HINT: RG316 teflon coax
has a very good silver plated braid and having lots of small
pieces I strip it flatten the briad
and use a drop of rosin flux as a substitute for Solderwik.
Because of the silver plating
it wicks solder vigorously.
The crystal I pre-tinned the pads and added a tiny bit of flus
then used my hot air tool.
The rest of the stuff was fine tip and the kester solder by hand,
been doing SMT for years
and a good set of tweezers and what I call a spare finger (spring
loaded hold down)
makes for easy assembly. Periodically cleaning flux from the
tweezers makes it easier
place parts as they can get flux on them and become sticky. I
also Degauss mine as
some of the small parts are magnetic, that removes that form of
cling too. I put the
board in a PANA-Vise, and position and solder everything on one
side then flip it.
The biggest thing is organizing all the parts and I use a plastic
tray (about 6x12 inches)
with large shallow compartments for keeping them under control and
sorted as to what
component group is being used at a given time.
Oh, and never ever sneeze! ;-)