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Messages - eds65gto

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Reel to Reel Tape Machines / Re: Revox A77 Abbey Road Mod
« on: September 21, 2016, 01:54:07 PM »
  To modify the A77 to bypass the input board jumper pin 1 to pin 4 , and pin 7 to pin 10 with a 5k resistor, This eliminates the input board.
  You can also replace R809 on the playback amp board with a 10 K trimpot to adjust the hi freq equalization on playback.
  These and other mods are from an article " Greening the Revox A77 " by Charles Repka from Audio Amateur magazine 4/1981 issue.
  You can also check out posts from " Audio Karma "  "Diy Audio " and " Reel to Reel Groups "
  Hope all this helps

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