Don,
Just for info...could you use insulated 24g cross connect wire for this
roid, thus making it easier to wind with no skinned spots on the insulation?
----- Original Message -----
From: "Don Wilhelm" <[EMAIL PROTECTED]>
To: "Sam M" <[EMAIL PROTECTED]>
Cc: <elecraft@mailman.qth.net>
Sent: Wednesday, December 10, 2008 7:53 PM
Subject: Re: [Elecraft] K102 AUX I/O Module toroid question
The "23" in the core designation is the outside diameter, so yes, you have
the correct core.
The Ferrite cores have no color markings, they are a dull gray. It is the
powdered iron cores that are marked with colors.
As for tips on winding without scraping the wire enamel - *push* the wire
through the core center instead of trying to pull it through. Yes, you
will have to pull to snug up the last inch or so.
In addition, to make a neat toroid winding, on each turn, form the wire
around the *outside* of the core with a free finger or thumb before
pulling it tight.
The wire lengths given in the Elecraft manuals are usually generous, which
assures adequate lead length no matter how sloppy the toroid winding may
be.
The ferrite cores sometimes have sharp corners. You can round off those
corner edges carefully with a file or sandpaper if they are exceptionally
sharp.
73,
Don W3FPR
Sam M wrote:
On my K102 AUX I/O Module,
I'm at the step that says:
"wind 12 turns of #26 red enamel wire (7", 18 cm) on the FT23-43 toroid
core (L5)"
1st question) is the 3/16 diameter dark gray ring really the toroid?
I've always seen toroids with a color band on them, this one has none.
also I was at about turn #6 when I skinned the wire while snugging it on
the core
so I will have to start again with another piece of wire,
it seems I had only used about 2.5 inches of wire by turn 6's
completion....
so again I'm now wondering if what I thought was the toroid,
is not really the correct item
no, I don't see any other round thingies in there,
and yes I counted it as the toroid when I did the parts inventory.
also any tips on how to not skin the wire while winding?
I have wound many toroids b4,
but they all had a glazed looking surface
and didn't have the rather sharp edges that this core seems to have.
it's way to small to try to sand the edges <-- my first thought
I'll stop babbling now and wait for ya'lls replies.
_______________________________________________
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
_______________________________________________
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
