On Saturday 20 July 2013 14:50:27 you wrote:
> Greetings all,
> Does anyone have old databooks of Siemens (now Epcos) ferrite materials
> at hand ?
> I'm looking for information of N28 material, after discovering a bunch
> of pot cores in the junkbox.
> 25 mm diameter, 16 mm height, and an AL value of approx. 1 uH per turn
> squared.
> The label carries the 'Siemens and Halske' logo, so these cores must be
> quite old.
> 
> The plan is to use one of them as transformer to feed the gate of a
> MOSFET which requires floating ground (source not connected to GND, but
> to the drain of another MOSFET).
> 
> Is this old N28 material usable at a few hundred kHz, and what about the
> max flux in the core / max density / saturation ?
> 
> Best regards,
>    Wolf  DL4YHF .

I have a Siemens data book with all data but the pot cores are 26x16 mm. If 
you confirm the diameter 26 I take some pictures an send you.

73 de Claudio IK2PII
 
 
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