The Best of the Best?Philips E88CC Pinched waist plate without hole 45 degree square getter?
My Tube Collection, Welcome to share yours
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ECC40, cousin of 6sn7 and e80cc. This is a 1952 example from Tungsram with black welded plates and disc getter. I have compared against top examples of 6sn7 / 12au7 / 12at7 and it sounds similarly good or better, even despite being hobbled with adapters. Rather an impressive tube.
Have you ever thought about putting some parts of your collection for sale? Who knows, maybe you have some rarities that another collector would pay a fortune to acquire... 
Great amps, check every capacitor when they 're good don't change.
Use Siemens&Halske tubes that make a diffrent animal out of grundig.
Amazing bass precision,3d sound with wonderful tone colours.
Shematics if you need
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The Robert Koda K15EX and K160 seem (at least relative to the remarkable CJ GAT 2 and Gryphon Mephisto) to be absolutely centered. Mellifluous, organic, powerful...but dead center by design.
In the case of of the Mullard 7308 ( at least relative to its 6922 brethern), is far more resolved...but it is still a Mullard with very powerful bass which the Zanden responds well to its in its PSU (all Mullard NOS thanks to Brent Jessee)...and its no different in the Zanden DAC Output tube where the Mullard 7308 really shines and actually outshines the Amperex 7308 which is perhaps lacking in the all-out power of the Mullard. Its very subtle, but as with all things great in high end audio, that's where the magic lies.
A nice result.
In the case of of the Mullard 7308 ( at least relative to its 6922 brethern), is far more resolved...but it is still a Mullard with very powerful bass which the Zanden responds well to its in its PSU (all Mullard NOS thanks to Brent Jessee)...and its no different in the Zanden DAC Output tube where the Mullard 7308 really shines and actually outshines the Amperex 7308 which is perhaps lacking in the all-out power of the Mullard. Its very subtle, but as with all things great in high end audio, that's where the magic lies.
A nice result.
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