[AMPS] Re: Ferrite Rod for 6M Amp

[Rich Measures]

>Subject:        	Re: [AMPS] Re: Ferrite Rod for 6M Amp
>Date sent:      	Thu, 27 May 1999 13:35:20 -0700
>From:           	Rich Measures <measures@vc.net>
>To:             	<W8JI@contesting.com>, "Amps Reflector" 
><amps@contesting.com>
>
>> 
>> 
>> hello, Tom
>> >
>> >While I agree an air core alone is sufficient to make a reasonable 
>> >filament choke on 50 MHz, Rich has a total misunderstanding of 
>> >what creates "distortion" that we can hear in a linear PA.
>> >
>> It was not a SSB signal.  It was an AØ signal of 100w.  The type-61 
>> material performed well at 10MHz.  The waveform looked good.  I slowly
>> increased freq.  At 14MHz, the waveform did not look good. .   However,
>> with a ferrite material rated for 50MHz max. instead of 10MHz max., no
>> distortion was observed at 14MHz.  
>
>Distortion on the slope of a sinewave has nothing at all to do with 
>undesired IMD, 

€  agreed.  I would assuredly not be looking for IMD with 100w of A-Ø 
signal.  

>assuming your observations are true (which I do not 
>believe they were).
>
>The correct test for non-linearity and intermodulation distortion is to 
>measure envelope distortion on a modulated signal.
>
>You "observed" nothing that means anything for IMD.
>
€  agreed.  Who brought up intermodulation distortion? 
>
-  later, Tom


Rich...

R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures  


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