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mr78

  1. PE9ZZ

    Dead MR78 on my workbench

    Just joined the ranks of McIntosh owners by receiving an MR78 tuner off Feebay. High on my want list for a long time. Got it from a German seller for €575 inklusive Versand. It was sold as defective. I opened it up and found the transformer still wired for 120 V. I quickly changed it to 240 V to...
  2. Corktowner

    MR78 Backwards Capacitor?

    Hello All. I just started work on an MR78 which I got in a multi-piece purchase last year, and when I hooked it up there was no sound, or at least none I could pick up. I read some of the posts and decided to open the unit up, check for burned components, replace the tantalum and electrolytic...
  3. jazz-z-man

    McIntosh MR78 Replacement Bezel

    I am wondering if anyone has the demensions for the rectangular bezel that essentially frames the tunning dial area and meters on the glass faceplate of the MR78 tuner? It's held on by double sided tape. It can dry out and fall off. Mine is lost. It's the last cosmetic piece I need to restore my...
  4. Alfmonster

    McIntosh MX110Z and C20 (later model)

    Hi, I've been wanting to get a tube preamp for quite some time and am now able to go either way between an MX110Z or a c20. Both have been looked over and meets or exceeds original specs. Perhaps what is causing a pause from going with the mx110z is the cosmetics. The gold lettering is...
    • Alfmonster
    • Thread
    • c20 mc225 mcintosh mcintosh c20 mcintosh mc225 mcintosh mx110z mr78 mx110 mx110 tube tube preamp
    • Replies: 18
    • Forum: Tube Audio
  5. Capt.Willard

    The Consumer Electronics Hall of Fame: McIntosh MR 78 Tuner

    Pretty cool article about the MR78 and Modafferi. It gets into interesting details about what made this tuner so special at the time, and the price! https://spectrum.ieee.org/consumer-electronicser-electronics/gadgets/the-consumer-electronics-hall-of-fame-mcintosh-mr-78-tuner
  6. C

    MR78 Trimpots/Symptoms

    I had tried a search at the beginning of my troubleshooting and found nothing, so I am posting this in hopes of helping the next tech. A customer's unit came to me with the following symptoms: Very low and distorted audio output Center of Channel Tuning (COT) meter pegged to the - side Signal...
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