[AMPS] Re: Hypothesis of the G2DAF amplifier operation

[Ian White, G3SEK]

Colin Lamb wrote:
>    Attached is data recently taken and a hypothesis which I developed 
>    as a result of the tests.  The hypothesis is presented for the 
>    purpose of testing it, throwing darts at it and proving or 
>    disproving it.  
>     
>    Two circuits are included in a .jpg format.  Also included is data 
>    in a generic spreadsheet format.  
>     
>    Text of my hypothesis is attached in both a text and Word format.  
>    
Thanks for the thorough information, Colin. Still processing here...

The QY3-125 that G2DAF used is the same as a 4-125. The operating
conditions in "G2DAF mode" are given in the scanned pages on my web
site.

> 
>    Reviewing the limited facts I have, I have arrived at a conclusion 
>    of why Norm, W6EDD's amplfier did have "doo-doo".
>     
Well, if that was the circuit of the amp that Rich heard, it is NOT a
G2DAF! It uses Norm's own ideas about generating screen voltage, and
thus is not relevant to this discussion.
 
73 from Ian G3SEK          Editor, 'The VHF/UHF DX Book'
                          'In Practice' columnist for RadCom (RSGB)
                           http://www.ifwtech.demon.co.uk/g3sek

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