• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

balanced RIAA amp

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musitronix

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Joined 2011
Does anyone have any info on a differential front-end RIAA preamplifier using 12AX7's that appeared in Wireless World/Electronics World. Author was Morgan Jones.

There is a diff-input amp in his "Valve Amplifiers", but it was very complicated and used a lot of difficult-to-obtain parts.

If anybody knows something about this amp, I would be very grateful!

Best,

Bob McIntyre
 
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