"FWIW if ultra-linear is set up correctly, the result should be a pentode or tetrode power tube operating with the same linearity as a triode but with about 90% of the power it could make as a pentode or tetrode." Bless Blumlein, Hafler and Keroes's hearts!
Pentode Power Tubes - Ultralinear vs Triode
While I’ve seen a bunch of posts on power tube rolling, I haven’t seen much mention of how preferences correlate to what mode you run if your amp has that option. I have a Primaluna DPHP that has the Ultralinear/Triode mode remote and can run a bunch of EL34 variants up to KT150.
So far I’ve only tried the stock EL34 and Tung-Sol 7581A and seem to prefer Triode mode with both. Before coughing up for another set of 8 to try I’m doing more research. I think based on my preferences so far that the bigger, punchier tubes may not be the way for me to go. I could be destined to find my way into SET amps eventually.
So which tubes do you prefer in what mode of operation?
So far I’ve only tried the stock EL34 and Tung-Sol 7581A and seem to prefer Triode mode with both. Before coughing up for another set of 8 to try I’m doing more research. I think based on my preferences so far that the bigger, punchier tubes may not be the way for me to go. I could be destined to find my way into SET amps eventually.
So which tubes do you prefer in what mode of operation?