Tube comparison chart

[Chazz]

Where do I get a chart to compare, for example, KT-66's with EL-34's, or KT-88's with 6L6's, etc? You know, differences in tone, voltage, etc, what amps can be rebiased for which tubes (ex. can a Deluxe BF be rebiased for KT-66's, how would that sound, etc).
Thanks!

[Enzo]

You get that chart by setting down with a pad of paper and a pen, and start doing research. I am not aware of any such gathering of opinions.

[Albert Kreuzer]

If you're looking for opinions, this might be helpful:

Tube Maps