[AMPS] Uselss reply

[measures]

>
>At 01:50 PM 1/21/2000 -0700, you wrote:
>>
>>>
>>>Rich insists,
>>>
>>>
>>> "For this application, Type 61 ferrite is rated by the manufacturer at
>>>10MHz max.   Using type 61 (mu=c.125) material at 14MHz, sinewave
>>>distortion can easily be seen on an oscilloscope.   Type 43 ferrite is
>>>rated at 50MHz."
>>>
>>>I know we've gone thru this before, but my Amidon catalog lists 61
>>>ferrite used in (low Q) BROAD BAND transmission line transformer service
>>>good to 200 mHz. A la, most every balun and un-un on the market.
>>>
>
>>Amidon is Not a manufacturer of ferrite material.  
>>
>
>What a completely worthless reply to the original message. He didn't say
>that Amidon manufactures anything Rich, he quoted a spec from the Amidon
>catalog.  The Amidon catalog quotes specs provided by Amidon's suppliers.
>Amidon is a distributor - everyone already knows that.
>
I have the ferrite manufacturer's catalog, Phil.  It has some different 
specifications than Amidon's catalog.  . I confirmed that, at least in 
this application, with Type-61 material, core saturation begins just 
below14MHz.  Why use a 10MHz rated material when 50MHz rated material is 
available?  //  It is my opinion that a lot of ham testing of ferrites is 
done at less than full suds.   With QRPP,  Type 61 material tested ok 
here at 30MHz.  

cheers, Phil.  

-  Rich..., 805.386.3734, www.vcnet.com/measures.  


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