[HAM] Best 12AU7 now 6550

[Brad Baker]

On Sun, Mar 9, 2008 at 1:21 AM, Ian Hooper <noisy at rogers.com> wrote:
>  Most of this distortion is from the 12AX7 phase splitter
>  regardless of whether the EL34 or the 6550 tubes are used in the power amp
>  stage.

This flies in the face of the service bulletin that changed 6550s to
EL34s in US Marshalls (or so I have read).  Were the distortion due to
the preamp stage such a change should not have mattered.

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