Mr- 78 tuner bezel

Discussion in 'McIntosh Audio' started by greymatter, Nov 13, 2017.

  1. greymatter

    greymatter AK Subscriber Subscriber

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    The plastic bezel on the face of my 78 has come off . Just curious of what I should use to reattach it to the glass . Adhesive or a expoxy or glue ? What do the pros use ?
     

     

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  2. Pio1980

    Pio1980 AK Member Subscriber

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    Is Aileen's tacky glue appropriate for this? Otherwise some sort of contact cement?
     
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  3. damacman

    damacman Blown and Injected Subscriber

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    Double sided tape is what McIntosh used.
     
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  4. greymatter

    greymatter AK Subscriber Subscriber

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    Thx for the reply gang , tried the 2 sided tape with not much success
     
    Last edited: Nov 13, 2017
  5. MACKIE1975

    MACKIE1975 Well-Known Member

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    There are many type of double sided tape. 3M is the best especially the industrial grade.
     
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  6. MACKIE1975

    MACKIE1975 Well-Known Member

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    You can also look for the 3M automotive type
     
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  7. damacman

    damacman Blown and Injected Subscriber

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    Why not run it sans bezel? Much cleaner ...

    You'll have to clean the glass perfectly with alcohol in order to get the tape to stick.
     
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  8. greymatter

    greymatter AK Subscriber Subscriber

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    Thx just finished cleaning all my gear with 99% isopropyiene. What a difference on the components .
     
  9. N8Nagel

    N8Nagel AK Subscriber Subscriber

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    Careful on silkscreened surfaces with that! I do it too, but be aware that can lift lettering on dial glasses etc. Now if it's screened on the backside like most are cleaning the front with isopropanol is perfectly fine.
     
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  10. jlovda

    jlovda Things I loved from the 60's and 70's Subscriber

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    Spray or dampen the rag, NOT the glass. It was earlier mentioned that excess cleaner flowing down under the lower metal strip is what causes the paint lifting along the bottom.
     
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  11. AbSoundLabsMN

    AbSoundLabsMN Absolute Sound Labs Subscriber

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    McIntosh uses a thin, double sided tape, similar to the tape made by 3M for the automotive industry. In order for the tape to adhere properly, you must carefully remove the old tape from the back of the bezel. This can be accomplished using the plastic razor blades sold at most home improvement stores. Some folks have stated they use an Xacto knife. I don't recommend this as it can cut into the plastic bezel. Of course one should refrain from using any label adhesive remover since many of them contain acetone which melts the plastic. Mark - McIntosh Service Center.
     
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  12. jlovda

    jlovda Things I loved from the 60's and 70's Subscriber

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    I have used Goo-Gone for projects like this and it works great. You will need multiple applications since the first few will just slowly soften the old tape and glue. You will get to the point where you can use a tiny screwdriver to just scrape the glue off. You will risk gouging with a knife blade. I was able to reuse the blue plastic filters from a broken front glass on my MC300. They were originally held on with double sided 3M tape. I just soaked an old Tee-shirt with Goo-Gone and slowly rubbed the old glue completely off without any scratches. It has a very slight oily feel but it evaporates dry. Goo-Gone is a citrus liquid with a very light mineral oil.

    I replaced my MR78 bezel using the thinnest 3m tape I could find; less than 1 mm. The back side of the bezel has two edges with a trough in the middle. I wanted the tape to sit in the trough and be just thick enough to come out above the top so the bezel doesn't look separated from the glass. Also, you do not need to put the tape completely around the bezel.
     
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  13. AbSoundLabsMN

    AbSoundLabsMN Absolute Sound Labs Subscriber

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    I did forget to mention Goo-Gone. It will also work, but takes longer to work then some other methods. Mark - McIntosh Service Center.
     
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