November 6, 2012

  • GE Grey Glass 6DJ8

    The review sample was purchased from an E-bay online store for about $20 - $25 apiece, on average.  Although not NOS, they usually scored in the 90% to above 100% range.  I find it impossible to read GE date codes, when they’re available, but assume these were made during the 1960s in their Owensboro, KY plant (the 188-5 plant code is evident on some of them).

    General Electric used a process during manufacture where a grey coating was sprayed on the inside of the tube which was thought to help in shielding the tube from radio frequency interference.  They are also referred to as “smoked glass”.  The GE 6DJ8 uses a disc-type getter structure.  

    GE Grey Glass 6DJ8                                                                              Line-Up 

    Close-Up                                                                                             Bottom View

    Disc Getter


     I’ve used the GE 6DJ8 as both the input tube for the Premier 140 amplifier in conjunction with GE 6550A and SED 6550C output tubes and in the Premier 16LS2 preamp.


    Listening Impressions:

    • Bass is well-developed if a little prominent and plummy at times.
    • Rich midrange that’s renders voices beautifully.
    • Delicate treble although slightly rolled-off in comparison to some others, such as the Lorenz PCC88.
    • Very good timbre and decay.  Piano is especially well-rendered.
    • Dense images populating a well laid-out sound stage.  Roger Waters 1992 disc Amused to Death puts you in the midst of a sonic diorama.
    • Although detail is excellent, it’s not reference level but you don’t mind because they’re so musical sounding.


    Although the GE 6DJ8 may be a cut below, if you’re looking to get a taste of the vintage Amperex 6DJ8 sound, these are a low cost alternative.   


Comments (1)

  • Yep, Amused To Death came out in Fall '92, during the grunge revolution. 'Twas a bad time for any musical genre not grunge or alternative, and thus, Amused To Death never became popular.

Comments are closed.

Post a Comment