Originally Posted by
wisnon
Most are the same...tall with the skirt. i have seen short ones with the skirt by eother Sonotone or Selectron. Then there is the squat no skirt Tungram, which i though was the only different construction. However, I have since seen Siemens which had identical construction.
The consensus is that the Mullards CV3884 are the worst, in that they are the least robust. All ECC40 tubes sound good, but the Tungram squat construction tube type seems to shade the other types in tersm of midrange and bass.
In terms of skirted tubes, I have seen Mullards, Phillips, Triotron, Selectron and Sonotone. I think Siemens ALSO has a skirted version too.