At 09:48 AM 8/21/2008, Jim Denneny wrote...
I am about to attempt the N8LP K3 Buffer Mod for improved RX
performance. It involves exchanging two, extremely small,
surface-mount resistors.
Chip-quick (
http://www.chipquikinc.com/newsletters/cq_new_june_2004.htm ) is great
for doing SMT rework. It's a low melting temperature alloy, which you
use like solder. It mixes with the existing solder to make device
removal easy. It doesn't take much.
Without a rework station, it's about the only thing you can use for
larger devices.
If you were experienced in working with SMT, then it might be overkill
for replacing just a resistor. But even if you've done SMT before,
there's still the danger of lifting a pad when using just a soldering
iron.
Good stuff if you want to do it yourself with minimal risk to an
expensive board.
For soldering the new component, I just make sure the pads are lightly
tinned, hold the component in place with a toothpick, and lightly touch
each joint with the iron.
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