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'65 Princeton Reverb RI

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02-02-2009, 02:02 PM

PaulR7

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'65 Princeton Reverb RI

Hi,

I need some information on the pre amp valve layout for the Princeton.

Reading left to right from back:

(1) 12AX7A
(2) 12AX7A
(3) 12AT7
(4) 12AX7A

What do each of these valve do? (e.g. Reverb tube, Phase Inverter)
Which ones, if any, are balanced?

Many thanks

Paul

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