[Amps] Guidelines.....toroids for tank ckts

[Gary K9GS]

I wonder what the permeability is of a jelly filled donut?

Did the bagel toast or just get stale?

On 3/25/2012 11:31 AM, Colin Lamb wrote:
> Toroids do not need to be wound on powdered iron or ferrite.  A core with no permeability works.  The advantage of such a core is the self-contained energy.  You can wind a core on teflon or some other material.  The disadvantage is that more wire is needed.
>
> A number of years ago, I made an antenna tuner for field day and wound the coil on a bagel.  It worked fine and got people's attention. Much easier to wind on week old bagels.
>
> That may have been the same year my final was a 5U4G.
>
> 73,  Colin  K7FM
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-- 


73,

Gary K9GS

Greater Milwaukee DX Association: http://www.gmdxa.org
Society of Midwest Contesters: http://www.w9smc.com
CW Ops #1032   http://www.cwops.org

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