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Re: [Amps] Need some 220K 2 watt carbon resistors

To: Jim Tonne <tonne@comcast.net>, KD7QAE <KD7QAE@ARRL.NET>,craxd1@verizon.net
Subject: Re: [Amps] Need some 220K 2 watt carbon resistors
From: Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>
Reply-to: g3rzp@g3rzp.wanadoo.co.uk
Date: Wed, 29 Mar 2006 16:49:44 +0200 (CEST)
List-post: <mailto:amps@contesting.com>
Jim said:
>With a resistor of 220K (which is what this thread is about)
wouldn't the inductance be kind of so-what? <
Precisely. At high frequencies, the shunt capacitance would probably dominate. 
And with values this high, it's not usually anything other than academic anyway.
I would argue that what you need is the appreciation of the particular 
frequencies and resistor values at which the parasitic effects need to be 
considered, and where they don't. Blanket statements can be a dreadful 
oversimplification - like the question in Amateur Extra exam on what is 
resonance.

73
Peter G3RZP
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