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[AMPS] DC Filaments???

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Subject: [AMPS] DC Filaments???
From: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK)
Date: Thu, 2 Nov 2000 08:01:25 +0000
Tom Rauch wrote:
>
>As for distortion, I was thinking in terms of the Hi-Fi amplifier the 
>one person had. I'd try to do something to match the bias more 
>evenly across the filament, to not ruin the good sound that goes 
>along with all that cotton covered oxygen-free wire and those old 
>clear sounding triodes.
>
In a push-pull stereo system, you MUST periodically swap the tubes
around - left to right, push to pull - in order to even out the wear.
Incorrect adjustment of the stereo balance can cause premature wear
along the edges or centers of the anodes.

73 from Ian G3SEK          Editor, 'The VHF/UHF DX Book'
                          'In Practice' columnist for RadCom (RSGB)
                           http://www.ifwtech.com/g3sek

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