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I've tested both STR 415s and Philips 7581As on a Maximatcher2.
Generally, at 400V the 7581 draws 30% more plate current, and has 20-30% more transconductance than the 6L6.
I've read the 105 transformer runs 500+ volts vs 460 volts for most others.
The 7581 seems to be a very robust tube.
Would substitution of 7581s burn up anything?
Anyone actually tried the swap and/or measured 7581s in circuit using the high voltage power transformer?
Generally, at 400V the 7581 draws 30% more plate current, and has 20-30% more transconductance than the 6L6.
I've read the 105 transformer runs 500+ volts vs 460 volts for most others.
The 7581 seems to be a very robust tube.
Would substitution of 7581s burn up anything?
Anyone actually tried the swap and/or measured 7581s in circuit using the high voltage power transformer?
