• 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.

UPGRADE Cathode Follower and other mod - Music Angel Marantz 7 Clone

If it's not identical, it is not a clone, and is not the Marantz circuit. The Marantz name is used only to sell boards.
And of course, the Marantz was also constructed with different parts, and on turret boards, not pcbs.
And the Marantz did not use a regulated power supply.
 
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