Hi Jay,
Can you recommend a way to compensate for the doubled inductance?
Also, I'd be interested in two driver boards if you get more made.
Thanks,
John
VA3VVV
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On Sat, 3/25/17, [email protected] <[email protected]> wrote:
Subject: Re: LF: Stacking toroids
To: "[email protected]" <[email protected]>
Received: Saturday, March 25, 2017, 7:32 PM
Chris
Your original post describes the core as
"warmish" after a WSPR session ... maybe some
clarification of what temperature "warmish" is
would be helpful. A core that runs 'warm' should not
be cause for great concern ... most core materials can
tolerate even moderate heating just fine. 'Hot',
on the other hand, would of course be another matter. As
pointed out in an earlier post, some of the heating may be
from losses in the copper windings.
One disadvantage to stacking cores (keeping the same
number of turns) is that the winding inductance doubles
from the original design. This will likely increase the
leakage inductance ... one negative effect being an increase
in switching transient ringing.
Jay W1VD WD2XNS WE2XGR/2
p.s. I'm looking into getting more driver boards
made ...
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