[AMPS] SB-220 Amplifiers and Garage Sales!!

[measures]

>
>
>-----Original Message-----
>From: Peter Chadwick <Peter_Chadwick@mitel.com>
>To: Jon Ogden <na9d@mindspring.com>; 'measures' <2@vc.net>
>Cc: amps <amps@contesting.com>
>Date: 23 March 2001 09:12
>Subject: RE: [AMPS] SB-220 Amplifiers and Garage Sales!!
>
>
>>
>>Rich says:
>>
>>> Rp was 101-ohms for a resistance-wire suppresor vs. 166-ohms for a
>>>copper-wire suppressor.
>>
>>Something puzzles me here. If the suppressor provided the whole plate load
>>impedance at the parasitic frequency, then the gain would be reduced by
>only
>>4.3dB by lowering the parallel resistance from 160 to 101 ohms. This may be
>>enough to just stop the parasitic, but doesn't appear to my mind to give
>enough
>>margin to ensure stability.
>
>
>Is it quite that simple? The suppressor is part of a *series* circuit from
>the anode through the blocking cap, connecting wires and tune cap so Rs is
>the number that counts. In a typical layout, the connecting leads swamp the
>Ls (and therefore Lp) of the suppressor.
>
What is  "Ls" and "Lp" Steve?

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


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