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.

Are they basically Borbely hybrid circuitry?

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Are they the same (attach files and Welborne CATO)?

Welborne Labs CATO Vacuumt Tube Linestage

If not what are their differences?

Thanks!

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