[Elecraft] reflow solder K-pod power resistor

[Don Wilhelm]

Bob,

It is good to hear that you were successful.
However, I have a reservations about your recommended technique.
Yes, a small bit of solder on the iron is required to conduct heat to 
the already soldered junction, but you should add a wee bit of fresh 
solder to the joint while reflowing.  The reason -- the heat of the 
soldering iron will vaporize the flux quickly, probably before you can 
touch the iron to the joint -- as a result, there is no flux left, and 
that is what the solder connection likely needs most - a bit of added flux.

So, yes put a small bit of solder on the iron and then touch it to the 
connection.  As soon as the solder begins to flow, touch the joint with 
your flux core solder to complete the job.  The use of small diameter 
solder prevents you from getting excessive solder on the joint/board/etc.

73,
Don W3FPR

On 12/26/2016 7:03 PM, Bob Novas wrote:
> I successfully reflow soldered the surface mount 6.8 ohm resistor across R82
> in my K3S today. It took me a while to get my courage up, but it worked out
> well.
>
>
>
> In the kind of reflow soldering I used, you melt some solder and flux on the
> tip of a temperature controlled iron, and then, while holding the SMD part
> to be soldered to the board in its final location, touch the iron tip to the
> surface mount part one one side and then the other until it heats up and
> solder flows (the "reflow").  It's hard to hold everything perfectly still,
> but you can take a couple cracks at it until you get it right.