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#83245 by Power is Serious
Tue Sep 15, 2009 7:20 am
Capt. Scott wrote:I repaired a Marshall IBS 200 watt Bass Head system, as it had a few pots broken off. (So I got the pots, pulled them and replaced them.)

When I did it, I used silver. I just figured that it was more conducive to the repair.

My "tech" says that I should have used LEAD as it has a lower melting point, but weaker bond.

SILVER is evidently used when you need strength.

Long story short, I am as confused as I was to begin.

SOMEONE really know? Anyone?


The three best conductors are gold,silver and copper...they all have a valence of 8 which means that in a copper,silver or gold atom there are 8 electrons in their outer shell or outer orbit, with 8 as the max you can have they are easily knocked out of orbit, as one of these gets knocked out it in turn knocks out the electron in the atom near it, this chain reaction of knocked out electrons is how electricity moves...
Something like silicon, tin or germanium have a valence of 4 which means that they can also knock out their outer electron however its more difficult since there are only 4 and they have a stronger bond -these are conductors but not really good conductors and are known as "semi-conductors...
Items such as rubber have atoms with a valence of only 1, to knock that singe electron out of orbit is extremely difficult, this is why items like rubber are classified as "insulators"
#84339 by EL84
Tue Sep 22, 2009 2:12 pm
solder safely. silver solder is good, always tin the end of your soldering
iron with a little first, if possible use a small pair of locking pliars to act as
a heat sink, dont wont the heat to hurt parts. touch the iron to part and touch the solder to the tip of the iron. let it flow out to make a bond.
be sure to not use too much. the solder joint should look nice and shiny
if it is dull you may have a cold solder connection. try again. if you are trying to solder circuit boards with traces be extremly careful as heat will
lift traces. it is dangerous to work on amplifiers without first setting a ground and discharging filter capacitors. if your doing guitar work, look for small mm pots, replace them with full size allen bradley, find OLD tone capacitors for your tone control. remember when it comes to electronics-parts-wire, the shorter the better. good luck! :idea:

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