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got an old AIMS VTB-120 bass head, question on retubing and possible bias.

Discussion in 'Amps and Cabs [BG]' started by theleveebreaks, Oct 14, 2005.

  1. hey, I have an old AIMS head that I bought from my friend for 100 bucks, it's a killer head but I was there since he first bought it (2 and a half years ago) and the tubes I'm pretty sure have finally gone. It runs on two 6550's and it has two ruby 6550 tubes in it right now. I want to retube it with either 6550 OR (this is what I want most to do) KT88's. I was thinking two JJ/Tesla KT88's. I use it for bass and guitar and I was wanting to know if the KT88's are a straight drop in replacement and if it's possible to do a rebias myself because I don't want to pay amp tech prices to do it. Thanks!
  2. The 0x

    The 0x

    Aug 24, 2003
    Timonium, MD
    If the amp still sounds good, then there's no reason to replace the tubes.