[AMPS] Network analysis of suppressors

measures 2@vc.net
Tue, 7 Mar 2000 09:08:12 -0700


>
>Rich says:
>
>>The thing to keep in mind about Ni-Cr-Fe/nichrome-60 alloy, is that the
>>decrease in VHF Q it affords is only 41% @100MHz.   
>
>Isn't that what you'd expect? 

pretty much.  Unfortunately, Wes made no measurement of the copper 
L-supp, so a direct comparison of the inductors is not in the cards.  

>Skin effect will lead to Q going up inversely
>proportional to square root of frequency.
>
At 50MHz, the Q ratio between Ni-Cr alloy and Cu appears to be around 1 
to 5.5.  I suspect that the VHF unQ is slightly enhanced because the 
Ni-Cr  is slightly magnetic.  Adding R-supp makes the Q ratio smaller.  
>
later, Peter

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