binocular question on W1

[John Shadle]

Hi,
Just picked up my first three Elecraft kits, the W1, W1SERKT, and the
DL1. I finished the DL1 this past weekend and just completed the W1SERKT
a few minutes ago after doing much of the work on the W1. I stopped
working on the W1 when I got to winding the magnet wire on the binocular
because I have a question.

For those of you who have built the W1, please offer some clarification
for me.

Winding the binocular is just like winding a toroid, no? For example,
when I make the first "loop" through one of the binocular holes I have
actually put the wire through twice which should count as two of my ten
times through the hole.

Just want to make sure I'm counting correctly as I don't want to built
the kit twice.

Thanks!
-john W4PAH

P.S. Can't wait until the custom enclosure is finished up by W8FGU.
Thanks also to AG4NN for passing along the PDF of his enclosure as well.
Quite impressive.


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[N8LP]

Think of it as two long toroids side by side. The two sides are treated
as two transformers and wound separately. You count turns the same way,
ie. a pass through the hole counts as a turn. If you count turns on the
outside edge, you will count 1 less. A "10 turn" winding will have 9
turns on the outside and 10 turns on the inside.

Larry N8LP



John Shadle wrote:

> Hi,
> Just picked up my first three Elecraft kits, the W1, W1SERKT, and the
> DL1. I finished the DL1 this past weekend and just completed the
> W1SERKT a few minutes ago after doing much of the work on the W1. I
> stopped working on the W1 when I got to winding the magnet wire on the
> binocular because I have a question.
>
> For those of you who have built the W1, please offer some
> clarification for me.
>
> Winding the binocular is just like winding a toroid, no? For example,
> when I make the first "loop" through one of the binocular holes I have
> actually put the wire through twice which should count as two of my
> ten times through the hole.
>
> Just want to make sure I'm counting correctly as I don't want to built
> the kit twice.
>
> Thanks!
> -john W4PAH
>
> P.S. Can't wait until the custom enclosure is finished up by W8FGU.
> Thanks also to AG4NN for passing along the PDF of his enclosure as
> well. Quite impressive.
>
>
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> 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
>
>

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[Ron D'Eau Claire-2]

There's two separate windings on that binocular core, John. Each winding
goes through only ONE hole in the core and around the end of the core next
to the hole. So you count a always: each pass through the hole is one turn.

See Figure 2 on page 6 of the manual where the text says, "...The wire
passes through the hole in the core exactly 10 times (and passes down the
side of the core 9 times), so turn 1 is when you first slip the wire through
the hole, before you wrap it around the outside."

Ron AC7AC


-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of John Shadle
Sent: Monday, April 23, 2007 8:20 AM
To: [hidden email]
Subject: [Elecraft] binocular question on W1


Hi,
Just picked up my first three Elecraft kits, the W1, W1SERKT, and the
DL1. I finished the DL1 this past weekend and just completed the W1SERKT
a few minutes ago after doing much of the work on the W1. I stopped
working on the W1 when I got to winding the magnet wire on the binocular
because I have a question.

For those of you who have built the W1, please offer some clarification
for me.

Winding the binocular is just like winding a toroid, no? For example,
when I make the first "loop" through one of the binocular holes I have
actually put the wire through twice which should count as two of my ten
times through the hole.

Just want to make sure I'm counting correctly as I don't want to built
the kit twice.

Thanks!
-john W4PAH

P.S. Can't wait until the custom enclosure is finished up by W8FGU.
Thanks also to AG4NN for passing along the PDF of his enclosure as well.
Quite impressive.


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_______________________________________________
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