[AMPS] 2000 ARRL Handbook question

measures 2@vc.net
Wed, 2 Aug 2000 09:39:11 -0700


>> When nichrome suppressors are used, is there a resistor in parallel with
>> the inductor?
>> 73
>> Peter G3RZP
>
>Actually Peter, if you look at the suppressor Wes tested it was 
>identical to the AL80B suppressor except one was nichrome and 
>one was regular tinned copper wire.
>
>There was no great difference between them at VHF, but at HF the 
>nichrome had much lower Q (as would be expected).
>
  Tom --  your theory that the resistance of nickel-chromium alloys 
Increases with a decrease in frequency is not supported by any published 
measurement.  Every other known conductor exhibits less resistance with 
decreasing freq.   

>If you take the suppressor design Rich sells, a hairpin, it actually 

(key-word)

>has higher VHF Q than the stock suppressor, when they are 
>installed in the anode system.
>
I don't see how this is possible.  There is not much difference in the 
length of the wire used in a U-inductor (hairpin)  L-supp and a 
coil-inductor L-supp.  
>.....
cheers, Tom.  



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


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