Stripping "Litz" wire inductor leads

[Al Klappenberger]

I am surprised nobody has asked about stripping the ends of the litz wire. Anyhow, here is how I do it...

Here's the procedure:

The insulation is heat strippable. Using a very hot soldering iron,

put the flat surface of the iron tip against the end of the wire so that it

looks like the wire is coming out of the iron tip and add solder until the

solder adheres. Turn the iron 90 degrees, without removing it from the wire

placing the flat surface against the wire lengthwise and add more solder.

Move the iron along the wire as the insulation melts. Keep a pool of melted

solder completely around the wire as you move along it. It will take about 20

or 30 seconds to strip half and inch.

NOTE: Be very sure you have all the strands connected together. It is

VITAL that all the strands be connected at BOTH ends of the

inductor!

Al K.

[KenB]

Thanks Al,

Re: Install for AA tweeter Litz type inductors:

This method is quite necessary! Heating from the bottom, I kept flowing and tapping off the solder a few times AFTER following your directions. I clipped the soldered end, and checked the wires end-wise, which looked Okay.

EVEN AFTER THIS, measuring inductance for one of the two inductors gave a slower and slightly varied read. So yet one more flow was necessary to one of the leads.

Bottom line:

============

If your doing Litz inductors, and have an inductance meter, be sure to check for a confluent solder connection by measuring your inductance!

[Al Klappenberger]

Ken,

At first it's a good idea to test the inductance, but after you strip a few of them and get the hang of it, you will be able tell if it's right just by looking at it. It will look like an ordinary stranded wire that has been "tined".

AL K.

[kent120]

Hi guys,

I wonder how do you measure the inductances? Can I do it with a Multimeter?

Thanks,

Kent

[Al Klappenberger]

Kent,

No! To measure inductance requires an impedance or inductance bridge or meter. You can also di it by measuring at what frequency a coil resonates with a known capacity. Then you calculate the inductance from the resonance equation.

Al K.