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winding your own transformer
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To: "'Tesla List'" <tesla@pupman.com>
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Subject: winding your own transformer
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From: Tesla List <tesla@stic.net>
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Date: Tue, 3 Feb 1998 14:23:27 -0600
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Approved: tesla@stic.net
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From: Malcolm Watts [SMTP:MALCOLM@directorate.wnp.ac.nz]
Sent: Tuesday, February 03, 1998 2:48 PM
To: Tesla List
Subject: Re: winding your own transformer
Question to David on cores:
> From: davmckin [SMTP:davmckin@ix.netcom.com]
> Sent: Tuesday, February 03, 1998 4:04 AM
> To: Tesla List
> Subject: Re: winding your own transformer
<snip>
> The ETD-34 toroidal ferrite core is a Magnetics core
> part no. P-43434-EC-00/P-43434-EC-XX where
> XX is the desired core material listed as numbers 20, 21,
> 22, or 23 - depending on the desired core material.
>
> No. 20 - AL = 135
> No. 21 - AL = 195
> No. 22 - AL = 285
> No. 23 - AL = 410
Q - are those Al values in nH/t^2 or 10nH/t^2 ? There seem to be
two standards used in the industry. I think Amidon use the 10nH
figure whereas Philips use the nH figure.
Apart from the obvious difference in permeability between the
cores quoted, what are the frequency characteristic differences? I am
guessing that these are the 10nH figures and the cores are ungapped.
?
Thanks,
Malcolm
<snip>