Spiral Filament?

Discussion in 'Amps and Cabs [BG]' started by Bass FreeLee, Mar 21, 2011.

  1. Bass FreeLee

    Bass FreeLee

    Jan 27, 2011
    Destin,FL
    "I Slap-AhH Da Bass MOn!
    I Noticed while shopping for preamp tubes, mostly 12ax7 and 12au7's that some have a " Spiral Filament"

    Can anyone give any input on the differences between this style and the norm?
    Pros and Cons?
     
  2. Hi.

    On all these years I've been around tubes, I've been under the impression that all of the "MI" tubes we use have spiral filaments?

    Could it be possible to have a link to said ad?

    Regards
    Sam
     
  3. Bass FreeLee

    Bass FreeLee

    Jan 27, 2011
    Destin,FL
    "I Slap-AhH Da Bass MOn!
    Antique Electronic Supply

    theres the link.. for some reason it wouldn't give me a link to the direct page i was looking at-- but its in the JJ preamp tubes section,
    I noticed it points out that some have spiral filaments and it doesn't note it for others
     
  4. jastacey

    jastacey

    Feb 8, 2009
    Houston,Tx