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Re: [Amps] Tuned Input - IMD and efficiency

To: amps@contesting.com
Subject: Re: [Amps] Tuned Input - IMD and efficiency
From: Tony King - W4ZT <amps071806@w4zt.com>
Date: Wed, 09 Aug 2006 11:06:27 -0400
List-post: <mailto:amps@contesting.com>
I personally would appreciate it if those that choose to turn every 
thread into a discussion of parasites and methods of preventing them 
would start a new thread instead of hijacking someone else's thread and 
killing it by doing so.

73, Tony W4ZT

Tom W8JI wrote:
>>> Nickel-chromium (resistance) wire is like copper wire 
>>> with the
>>> resistor built in.
> 
> Since the primary current path at low frequencies is through 
> the copper, and the primary current path at the highest 
> frequencies is through the parallel resistrance chaning the 
> resistance of the conductor in the inductor has the largest 
> effect on the lowest frequency.
> 
>>> “The combination of both resistance and inductance is 
>>> very effective
>>> in limiting parasitic oscillations to a negligible value 
>>> of current.”
> 
> The idea of a suppressor, if one is necessary,  is to dampen 
> load the circuit with resistance so the stage is stable. 
> It's not to minimize the current of an oscillation.
> 
>> Henry Radio came up with the novel idea on the 8K-Ultra. A 
>> large brass strap
>> was wound into a single turn, and heavily chrome plated. 
>> This serves as the
>> parasitic suppressor on the 3CX3000A7. No additional 
>> parallel resistor is
>> needed. I love those who think out of the box!
> 
> There are often many ways to solve a problem. Many times, 
> especially with tubes like the 3CX3000, a suppressor isn't 
> even needed.
> 
> 73 Tom 
> 
> 
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