[Lf] 3C85 Core Material

[Andre Kesteloot]

Steve McDonald wrote:

> Now that the soldering irons are coming out I suspect that there is
> considerable interest in transmitter construction. Most of the European tx
> designs utilize the (now defunct) 3C85 series of ferrite cores. This
> material has now been replaced by 3C90 material. Has anyone done any
> investigation of the specs for this ferrite to find an Amidon equivalent
> that could be substituted in the Eu designs?
>
> Steve / VE7SL

Hello Steve,

The technical information that I was able to find on the web on Philips 
cores was never presented in a manner similar to that available for 
Amidon material, and comparisons were thus difficult to establish.  

Hence I usually look up, or recalculate the filter or transformer 
parameters, then use the Amidon specs, wind my own, then test. 

73
André