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  1. #51
    Senior Member
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    May 2013
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    Tallahassee, Florida/Greenville, SC
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    Re: Bob Carver ‘Black Magic’ VTA 20S Tube Amplifier Review from Dagogo.com ...

    Chris

    I think you can tube roll fairly simply with the Carver. I just think he runs his EL-84/6BQ5's at a higher voltage, which means there life expectancy is less. Rolling the driver tubes won't hurt anything they just may not last very long. At the price of some of the tubes mentioned earlier in the thread you just need to know that going in. Since that amp is "auto biasing", what are they auto-biased at. Roger's amp is biased at 30mv. I would suspect the Carver is a bit higher. I still think I would contact Roger directly at his forum on AC and ask him. He seems to be willing to answer any question about anything tube amp related.

  2. #52
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    State of Confusion
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    3,788

    Re: Bob Carver ‘Black Magic’ VTA 20S Tube Amplifier Review from Dagogo.com ...

    I didn't realize it's self-biasing so you can't just set the bias low before putting in new tubes and then bring it up to the proper level. Like Jack said, you don't want to go blowing out $100-200 tubes as soon as you put them in.



    Sent from my mobile.
    Doug



  3. #53
    Senior Member
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    Nov 2013
    Location
    Eastern Shore, MD
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    1,312

    Re: Bob Carver ‘Black Magic’ VTA 20S Tube Amplifier Review from Dagogo.com ...

    Update - Omegas are here! But you'll have to give me a few days, to digest and comment; they are not at all, what I expected!

    Besides...I need to build 'em, some proper stands this weekend.
    CD

    DAC/Pre-amp - PSAudio DsJ > Power-amp - > Speakers - PMC TwentyFive 23s

  4. #54
    Member
    Join Date
    Mar 2014
    Location
    Elizabethtown Ky
    Posts
    43

    Re: Bob Carver ‘Black Magic’ VTA 20S Tube Amplifier Review from Dagogo.com ...

    image.jpg Congrats on the baby carvers! I love my big ones especially after Bob modified them for the kt150's. Can't wait to hear your thoughts!
    Modified Carver VTA-180's running KT-150, Carver VTA20s
    Technics sl-1700mk2 Oppo 105
    Jbl l300,l65,l166,l112, Martin Logan ESL, Pioneer HPM900, Yamaha NS70t, Gallo Classico 4
    Pioneer sx 1250, Sansui 9000db, Marantz 2285b

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