[AMPS] Parasitic suppressors/another question,

[Rich Measures]

>
>
>
>On Thu, 8 Apr 1999 11:13:44 -0700 Rich Measures <measures@vc.net> writes:
>>
>ALL SNIPPED
>
>>>> 
>>>> This is somewhat of the principle behind a load pull test.  You 
>>either 
>>>> short out or open circuit the output of an amp and then rotate it 
>>around 
>>>> the Smith chart (via Ctune).  Also, the tank inductor generally 
>>provides 
>>>> a large enough reactive impedance to VHF energy that it likely 
>>doesn't 
>>>> matter wether you have a load on or not.
>>
>>Ä  amen. In parasite-arced bandswitches, damage occurs primarily on 
>>the 
>>10m and 15m taps.  .  
>
>
>Completely subjective and unproven Rich.
>
> 
>Another option which I subscribe to is Peters/Ians  version when it comes
>to parasitics.
>
>In a real amp that is 100% stable to start with, the switch failures are
>primarily due to the mfg trying to save a few $$  and using a poor
>initial choice .
>Before the doubters wind up in a snit I suggest that they take a real
>look at the specs of the commonly used switches and try to understand
>exactly what they are spending money on.
>
>73  Carl KM1H
>
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Rich...

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


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