What can I swap 12AU7 with?

organ
organ Posts: 4,969
edited August 2005 in 2 Channel Audio
After waiting for about a year, I finally brought my ASL pre amp to a repair guy (hopefully he can fix it) and I'm wondering what tubes can I put in place of a U7? 12AT7?

Maurice
Post edited by organ on
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  • Early B.
    Early B. Posts: 7,900
    edited August 2005
    Check this out...

    http://www.tubestore.com/gainfactor.html
    HT/2-channel Rig: Sony 50” LCD TV; Toshiba HD-A2 DVD player; Emotiva LMC-1 pre/pro; Rogue Audio M-120 monoblocks (modded); Placette RVC; Emotiva LPA-1 amp; Bada HD-22 tube CDP (modded); VMPS Tower II SE (fronts); DIY Clearwave Dynamic 4CC (center); Wharfedale Opus Tri-Surrounds (rear); and VMPS 215 sub

    "God grooves with tubes."
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  • RuSsMaN
    RuSsMaN Posts: 17,987
    edited August 2005
    12at7, 12az7, 12bh7
    Check your lips at the door woman. Shake your hips like battleships. Yeah, all the white girls trip when I sing at Sunday service.
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  • organ
    organ Posts: 4,969
    edited August 2005
    Awesome. Thanks guys.
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  • ohskigod
    ohskigod Posts: 6,502
    edited August 2005
    RuSsMaN wrote:
    12at7, 12az7, 12bh7


    what would change with this type of swap?, gain?, overall sound?
    Living Room 2 Channel -
    Schiit SYS Passive Pre. Jolida CD player. Songbird streamer. California Audio Labs Sigma II DAC, DIY 300as1/a1 Ice modules Class D amp. LSi15 with MM842 woofer upgrade, Nordost Blue Heaven and Unity interconnects.

    Upstairs 2 Channel Rig -
    Prometheus Ref. TVC passive pre, SAE A-205 Amp, Wiim pro streamer and Topping E50 DAC, California Audio Labs DX1 CD player, Von Schweikert VR3.5 speakers.

    Studio Rig - Scarlett 18i20(Gen3) DAW, Mac Mini, Aiyma A07 Max (BridgedX2), Totem Mites
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  • RuSsMaN
    RuSsMaN Posts: 17,987
    edited August 2005
    The AT and AZ will change gain, the BH offers better overal performace (and looks cooler too). I use 12BH7's as the cathode followers in my modded Anthem AMP-1, the original circuit used a pair of 12AU7. I also rolled 6189's, but like the 12BH7 performance the best.

    Regardless, I would consult your manual / manufacturer before swapping any tube that isn't a DIRECT replacement, not just pinout, but voltage.

    As the tubestore link above mentions, it's usually safe to go DOWN in gain, you need to use caution when going UP.
    Check your lips at the door woman. Shake your hips like battleships. Yeah, all the white girls trip when I sing at Sunday service.
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