The 50 turns/5 turns transformer is specific to
the loop feed in my NCJ article. Are you cloning
my design, or adding a transformer onto some
other design?
The core I called out is much larger than would be
needed for electrical reasons, but is chosen because
the large size makes is relatively easy to wind.
(Still tedious, but not difficult).
I still have unloaded PC boards available for
$33 (incl shipping) per set which includes a
ferrite core. You can also buy the cores from
Amidon associates.
Rick N6RK
On 4/2/2016 7:41 AM, Herbert Schoenbohm wrote:
Just a question about loop matching ferrite coils......are these
available anywhere pre-wound anywhere. I wind the easy ones to match
Beverages but the 50 turns is going to be a chore.
Herb, KV4FZ
On 4/2/2016 8:48 AM, James Rodenkirch wrote:
Thank you to all for the replies/comments/suggestions --- I am all
over finding a #61 or #43 material core for a xfmr....71.5/72 de Jim
R. K9JWV
________________________________________
From: Topband <topband-bounces@contesting.com> on behalf of Jim Brown
<jim@audiosystemsgroup.com>
Sent: Friday, April 1, 2016 2:55 PM
To: topband@contesting.com
Subject: Re: Topband: Receive loop observations
On Fri,4/1/2016 1:36 PM, James Rodenkirch wrote:
need to find a Fair-rite 61 core
N6RK notes that Fair-Rite #43 will work fine, with slightly increased
loss. Mu is higher, so you will likely need fewer turns to get 100 uH.
#43 is much easier to find.
73, Jim K9YC
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