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[AMPS] Input impedance

To: <amps@contesting.com>
Subject: [AMPS] Input impedance
From: 2@vc.net (2)
Date: Fri, 25 May 2001 07:46:11 -0700
>
>QST Dec. 1958 pg. 32-35+184 have a rather good theoretical description 
>of this topic with some practical examples
>
>I have this article in photocopy. I could scan it, but I am not sure if the 
>quality of the copies is good enough. If someone is interrested, please 
>say so and I will try. And if someone could host the copies everyone 
>could get access.
>OZ5TG, Verner

?  I am interested, Verner.  I can host JPEG and GIF images.  This 
article was written during the golden years, when *QST* had a Technical 
Editor who was extraordinarily knowledgeable - -  Mr. George Grammar.  

cheers
>

> 
>----- Original Message ----- 
>From: "Jon Ogden" <na9d@speakeasy.net>
>To: "Bill Coleman N2BC" <n2bc@stny.rr.com>; <amps@contesting.com>
>Sent: Friday, May 25, 2001 6:11 AM
>Subject: Re: [AMPS] Input impedance
>
>
>> 
>> on 5/24/01 10:28 PM, Bill Coleman  N2BC at n2bc@stny.rr.com wrote:
>> 
>> > How does one determine / calculate the input impedance in a cathode driven
>> > GG circuit?   A pointer to a book / article would be great.
>> 
>> I think there is generally a driving impedance specified by the tube data.
>> At least this is where I have gotten mine from.  Bill Orr's book has a table
>> of various tubes with the drive impedance specified.
>> 
>> In my "limited" experience, I have generally seen this information provided
>> in app notes from the manufacturers.  I am sure it can somehow be
>> calculated, but since I've never had to do it, I am not sure how it should
>> be done without sitting down and spending some time on it.  Perhaps someone
>> else can answer it better.
>> 
>> What tube are you looking for data on?  I'll see if it is in any of my
>> books/literature.
>> 
>> 73,
>> 
>> Jon
>> NA9D
>> 
>> -------------------------------------
>> Jon Ogden
>> NA9D (ex: KE9NA)
>> 
>> Member:  ARRL, AMSAT, DXCC, NRA
>> 
>> http://www.qsl.net/ke9na
>> 
>> "A life lived in fear is a life half lived."
>> 
>> 
>> --
>> FAQ on WWW:               http://www.contesting.com/FAQ/amps
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>> Problems:                 owner-amps@contesting.com
>> 
>
>
>
>--
>FAQ on WWW:               http://www.contesting.com/FAQ/amps
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>
>


-  R. L. Measures, 805.386.3734, www.vcnet.com/measures.  
end


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