On 3/20/02 10:50 AM, w8diz at w8diz@fpqrp.com wrote:
>1...The trick to tinning magnet wire is to find a GOOD WAY to remove the
>insulation first. Some magnet wire will melt the insulation off as soon as
>it is heated. This stuff is easy to tin. Just heat it with your solder
>pencil and apply solder at the same time.
This is the kind that Elecraft supplies in their kits. It sounds easy,
but it is a bit more involved.
First, you have to have a good blob of solder on the iron to a) transfer
the heat, b) collect the insulation debris, and c) tin the lead. The blob
loses its effectiveness for b) in short order. This means you have to
clean the iron tip, apply a solder blob, tin the lead until the blob will
take no more, clear the iron tip, etc.
Second, a low-wattage iron like you would use for PC board construction
doesn't put out enough heat to remove the insulation quickly. A solder
pot is probably best.
It just seems to take forever. Oh well. All the toroids in my K2 are
wound and installed. I just have to worry about those in the options....
>5...After you are barely holding the wire in the crotch of the dikes, pull
>the wire thru the dikes with your left hand, constantly monitoring the
>pressure of the jaws with your right hand. Repeat this proceedure, rotating
>the wire in the jaws of the dikes.
I do this with the type of wire mentioned in 1). It speeds up the process!
>7...When stripping and tinning toroid wires, strip and tin the wires all the
>way to the body of the toroid. Many times the insulation is not stripped all
>the way to the body of the toroid, so when you insert this wire into a PCB
>hole for soldering, the insulation is still on that part of the wire that
>penetrates thru the PCB solder hole, NOT making a proper electrical
>connection.
This is sometimes hard to do, because you don't want to heat the core of
the toroid directly. Hold everything in a pair of pliers helps to prevent
burned figures.
Bill Coleman, AA4LR, PP-ASEL Mail: aa4lr@arrl.net
Quote: "Not within a thousand years will man ever fly!"
-- Wilbur Wright, 1901
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