6DJ8

6,3V

E88CC

5,5...7

150

Special attention needed: This tube excist as normal grid tube and as frame grid tube. The frame grids have generally better parameter stability, lower noise and lower hum. These are the later technology, and also a technology only very few could make. Frame grid wires can be as thin as 10um, which is technologically speaking a masterpiece of fine mechanics. The frame grid wire is so thin, when you open up a defective tube, you can not see it with the bare eye. To give you an idea, the size of a large bacteria is 5um. When frame grid tubes, we write it in the description.

The Russians made very special quality grade 6N1P-EB. This is one of the finest ECC88 made, but these need twice the filament current, and have slightly lower gain. These have lower noise, and less distortion.

Is your ECC88 microphonic? Try the DUENDE tube rings we sell. This may help you more than changing tubes. The Duende dampers are GUARANTEED to give an audible improvement. We have Money-back guarantee on those. Also you should try the Svetlana types 6N1P. The ones we sell, are "EB", also when not specified like this, it's what they are.

Is your ECC88 humming or making noise? When no, then skip this text. Used tubes of this type generally have more hum and noise. In some cases the ECC88 is not used correct. Even with top-name ampplifier manufacturers we see sometimes mistakes, coming from not reading a datasheet. (reading datasheets CAREFULLY seems to be a "no no" amongst High End Amplifier manufacturers) Then it works with most of the tubes, but not with all, and users have to be swapping tubes all of the time, and desparately try to draw some conclusion from this. The next three boxes are a short overview of the most important thing to check, in case of a problem. Only do these measurements inside your amplifier, when you have experience with this. Leave it up to a technician otherwise.

Low Noise types: Use 6N1P-EB or original NOS Tesla E88CC gold grid version.