I have an old bag of toroids, I've had them for 25 years and I have no
idea how long the previous owner had them before me.

The label on the bag says:

40/50 mix

They are about 15/16" OD, 9/16" and are 5/16" thick. They are green
(ID/OD and one side) and yellow on the remaining surface.

I would like to use them in a frequency sensitive application, so I
really need to know what a '40/50 mix' means.

I've googled, got nothing. When I included "toroid", got nothing even
close when I left it out I got things like recipes, motor oil spec's
etc.

I think the 40/50 mix is the old method of grading the material, but I
can't seem to find anything about it on the web.

Any idea what this mix is good for?

Thanks,

T

TRABEM wrote:


Any idea what this mix is good for?

Thanks,

Nope. Wind and test a few examples and you can probably get into a
ballpark.

If they are power supply toroids vs rf toroids, or ferrite vs powdered
iron, that will quickly become obvious. The way the surplus market
goes, most "found" toroids are power supply types and only good for that
application.

-Bill