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  1. A

    BLUE ANGEL RECTIFIER TUBE REPLACEMENT?????

    OK. How about the rectifier tube?
  2. A

    BLUE ANGEL RECTIFIER TUBE REPLACEMENT?????

    I have a B.A. with a slight hum now. I'm pretty sure a 5AR4 will clean that up. I would like to know if anyone has had success with any of the following tubes (or any others for that matter): 1. Mullard from the late 60's 2. Groove Tube Gold series 3. Sovtek. 4. Cryogenic treated...
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