[Elecraft] Toroids

Mon Jun 3 08:20:01 2002

If you have a way to measure inductance, you can tell which cores are ferrite and
which
are powdered iron easily by winding a test coil.  The ferrite cores will have a much
higher inductance per turn!  Best way really is to wind a balun with them and give
them a try!  8-12 turns is usually adequate (bifilar or trifilar depending on whether
you want 1:1 or 4:1)

73,
Sandy W5TVW
----- Original Message -----
From: "Trevor Day" <[email protected]>
To: <[email protected]>
Sent: Monday, June 03, 2002 4:18 AM
Subject: [Elecraft] Toroids

| With all the talk about toroids and baluns recently I decided to rifle
| through the junk box looking for suitable cores.  It appears that I have
| plenty of all shapes and sizes but I have no idea of their individual
| properties.  Is there any way of identifying these unmarked devices so I
| can put a few to good use?
|
| Thanks,
|
| Trev G3ZYY K2 2637
|
| --
| Trevor Day
|
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