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Tubes that are supposed to be svt-cl???

Discussion in 'Amps and Cabs [BG]' started by kringle77, Feb 22, 2005.

  1. kringle77

    kringle77 Supporting Member

    Jul 30, 2004
    Massena NY
    My brother is putting new preamp tubes in his 2003 Ampeg SVT-CL head. He said there were two 12Au7 tubes in it and one 12ax7. Is this correct? I always thought that it was the other way around. Please help me out here SVT guys.
  2. Jerrold Tiers

    Jerrold Tiers

    Nov 14, 2003
    St Louis
    For SVT-CL, preamp has 2 (two) 12AX7.

    Power amp has 2 (two) 12AU7 and one 12AX7.

    The tubes should still be fine, unless there is a known problem. Preamp tubes last a long time.