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Revox A77 open reel machine

Discussion in 'Electronic Repair' started by Donald, Feb 16, 2007.

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  1. Donald

    Donald Guest

    I need to know if anyone can get, or has brake bands for
    this machine. It's a must have. If you can help please
    email to thanks, Donald.
     
  2. boardjunkie

    boardjunkie Guest

    Call these guys....
    http://www.jmtecharts.com/

    Won't be cheap...but unless you want to make some (wouldn't be hard)
    they're the best source.
     
  3. IIRC the brake bands look like a thin layer of cork.

    BTW have you already tried the simpler fixes, such as cleaning the
    bands with alcohol?
     
  4. Meat Plow

    Meat Plow Guest

    JM Technical Arts
    313 Rembrandt Dr.
    Old Hickory, TN 37138
    Telefon: 001 615 754-8323
    Fax: 001 615 754-8314
     
  5. boardjunkie

    boardjunkie Guest

    Not on the A77. They are very thin metal bands. There is a cotton like
    lining on the outside of the reel motor's rotor where the band rides.

    If one were ambitious it would be possible to fashion some out of
    nylon carton banding.

    Tip: The brake bands on this machine are prone to resonating
    (creaking, groaning) when the reel slows to a stop. An easy remedy for
    this is to apply some thin foam mounting tape to the outside of the
    band to damp vibration.
     
  6. boardjunkie

    boardjunkie Guest

  7. boardjunkie

    boardjunkie Guest

  8. ~db~®

    ~db~® Guest

  9. Surely you're not serious? The A77 is a domestic machine that is at least
    25 years old. And is hopeless to edit on so never the choice of radio
    stations. Studer are the pro side of Revox and made many suitable 1/4"
    machines that were common in radio - once - but all the stations I know
    now use DAW based systems.
     

  10. Not around here. It is digitized to a hard drive, edited, and stored
    in their automation systems. They have thrown out all of their R-R,
    cart, and cassette tape machines. Their turntables are gone, replaced
    by a couple CD drives. The large audio boards are gone, replaced with a
    multiple channel sound card and software. This trend started over 10
    years ago.


    --
    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
     

  11. The Studer/Revox A77 R-R tape deck is 40 years old. It was
    introduced to the market in 1967. It was available to radio stations
    before it was sold to the public.


    --
    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
     
  12. One of the primary functions of a 1/4" machine in a radio studio is for
    editing, and the A77 is hopeless for that. Studer already made suitable
    pro machines so I really can't see why they'd have aimed it at radio
    stations. Fine machine though it is, it simply isn't suitable. I suppose
    it might have been used for office listening given it was one of the few
    domestic machines that took NAB spools. But that's not really radio use.

    As to tape still being used, MiniDisc was a good and cheap replacement for
    that before computer based systems became the norm.
     

  13. The stations that I saw it in used it for portable use, in the field
    to record raw reports. then the tape was edited on the studio machines
    for broadcast. The first ad I saw for the A77 was in a broadcast trade
    journal. When cassette recorders were improved to an acceptable level,
    the portable r-r machines went into a closet.

    Some of the A77 decks were modified to use in crude '60 & '70s
    automation systems. They were loaded with one hour tapes to run all
    night. The timer switched from one machine to the next, and the tapes
    were made, then duplicated by a programming service. Some of the
    services rotated the tapes along a circuit, so they were pretty well
    worn out by the time they were returned. A friend of mine has about
    1000 10.5" and 7" reels that he's dragged home from a number of stations
    he maintains. he also has a lot of 30 minute records from syndicated
    programs from that era.


    --
    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
     
  14. Good grief. They must have had strong reporters. ;-) And you could
    guarantee a mains supply in the field?
    Things like the Uher Report were industry standard R-R machines for this
    use - battery operated. Or Nagra if better quality was needed.
    Seems strange to go down that route when there were makers producing the
    exact equipment for this sort of use.
     
  15. Meat Plow

    Meat Plow Guest

    Maybe some use them but I know many that went to digital and at least one
    a friend of mine works for that uses Sony Vegas on a Windows Xp platform.
     
  16. ~db~®

    ~db~® Guest

    Oh, yes, I am serious. Not my choice for tricking
    out a professional studio, nor for a home machine
    for that matter. I have edited enough
    quarter-inch audio tape to stretch from here to
    Mars and back. Won't argue that the A77 is
    probably the worst open-reel deck for that job.
    And portable? In name only. But in the small
    town stations where I started out, state of the
    art was often trumped by state of the budget

    And, as you guys aver, digital rules. My point
    is, though, that there are enough of the old
    machines still around to make me wonder that parts
    are not available still. Be well.

     

  17. I am talking about things like recording a high school ball game for
    later broadcast, where a tech, or even the chief engineer went to the
    site to set up, and tear down the equipment. You live in the land of
    the government funded BBC. in the US, most stations were privately
    owned by an individual, or it was a family business.


    Sure, for 15 minute or less interviews, where you didn't have to stop
    and change the tape.


    Used A77 were available, and the engineers loved to tinker. Money
    spent on studio equipment wasn't available to fix other things.


    --
    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
     
  18. Maybe, but their local radio stations had shoestring budgets.
    But the A77 was an expensive high end domestic machine. Weren't there some
    cheaper but more robust home grown makes - Ampex, etc? In the UK,
    Ferrograph tended to have that side of the market sewn up.

    I'm just curious - I'm an A77 fan. I have two including an HS one. And a
    Dolby SR unit for use with them.
     
  19. boardjunkie

    boardjunkie Guest

    I have a MK1 A77 w/stainless steel faceplate that's been completely
    rebuilt and updated by TM technical. Sound quality is just amazing.
    Better than my Otari. But still a PITA to use....I wish they hadn't
    made them so compact.
     
  20. Yup. They are capable of very fine sounds.
    Which is why I expressed surprise about them being used professionally.
    Perhaps Studer deliberately made them so awkward to avoid pinching sales
    from the pro side.
     
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