Results 1 to 6 of 6

Thread: 12AX7 vs 12AT7 vs 12AU7

  1. #1
    Member
    Join Date
    Apr 2004
    Posts
    48
    Likes (Given)
    0
    Likes (Received)
    0

    Default 12AX7 vs 12AT7 vs 12AU7

    What's the difference between the 12AX7, 12AT7, and 12AU7 preamp tubes?
    Can they be used interchangably?

    Thanks

  2. #2
    Moe's Bluesman Curly's Avatar
    Join Date
    Mar 2004
    Location
    California
    Age
    65
    Posts
    6,989
    Likes (Given)
    121
    Likes (Received)
    63

    Default Re: 12AX7 vs 12AT7 vs 12AU7

    "music heals"
    facebook

  3. #3
    Member
    Join Date
    Apr 2004
    Posts
    48
    Likes (Given)
    0
    Likes (Received)
    0

    Default Re: 12AX7 vs 12AT7 vs 12AU7

    Has anybody tried substituting 12AT7's or 12AU7's in a modern preamp?
    How did it sound?

    Thanks

  4. #4
    Moe's Bluesman Curly's Avatar
    Join Date
    Mar 2004
    Location
    California
    Age
    65
    Posts
    6,989
    Likes (Given)
    121
    Likes (Received)
    63

    Default Re: 12AX7 vs 12AT7 vs 12AU7

    honestly, about the only preamp substitution I liked was putting a 12AY7 in V1 of the Bassman RI.

    you have to be aware of the current draw, as well as the gain factor, but I'm no expert on that
    "music heals"
    facebook

  5. #5
    Mojo's Minions Quencho092's Avatar
    Join Date
    Jul 2004
    Age
    26
    Posts
    3,553
    Likes (Given)
    0
    Likes (Received)
    19

    Default Re: 12AX7 vs 12AT7 vs 12AU7

    would it be safe to put a lower gain tube in V1 in a fender blonde
    2004 50th Anniversary Deluxe American Strat, SETH-N BRIDGE, ANT 2 SURFER MIDDLE, ANT 2 DLX MINI HUM NECK

    280K RS guitarworks volume pot, 250k cts tone pots, .047uf paper in oil Jensen aluminum capacitor, running D'addario Chromes 13's with wound g > Analogman Orange Juicer>Acoustic 200H Bass head> Alesis Picoverb> unknown 12'' JBL Orange car speaker

  6. #6
    Ultimate Tone Slacker Fresh_Start's Avatar
    Join Date
    Mar 2004
    Location
    Richmond
    Posts
    2,110
    Likes (Given)
    2
    Likes (Received)
    8

    Default Re: 12AX7 vs 12AT7 vs 12AU7

    Dumb question time - does "lower gain" mean that the tube would allow more clean headroom in the preamp stage? Or does it mean that the amp will start breaking up earlier?

    Ice Man - I know I tried a 12AT7 in one of the slots of my Blues Jr. but can't remember what it did...

    Actually here's the answer to my question and a lot of other stuff too: Bill Machrone on pre-amp tubes.

    Hope this helps.

    Chip
    Heritage 535 Special, Warmoth frankenstrat, MIM Strat, & Taylor 314C(no E)
    Amp Builds: Tweed Princeton (5F2-A) variation, 2 BF Princeton Reverb clones, & Super Reverb clone
    Sometimes use a Blues Jr., Tech 21 Trademark 10 & Power Engine 60
    SPG modded DS-1, TS-7 & CryBaby; Visual Sounds Rte. 66 & H2O; Guyatone Tremolo
    SD pickups: SSL-2, APS-2, tapped Quarter Pound, Custom 5 & Antiquity humbuckers

    "Conan! What are the best things in life?"
    "Girls, guitars, guns and cars!"

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •