• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Understanding load lines

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rotaspec

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Joined 2007
TheGimp said:
It would be much easier just to switch from 6P1 chinese tetrodes to 6P1P(-EV) Russian tubes. I'm running 6P1P-EVs in PP and getting 10W with no difficulty.

At 13W I get a slightly red fin on one plate (Have to turn the lights off to see it).

Sound is great.
Click to expand...

I have a set of 6P1P-EV which have been swapped in place of the Chinese 6P1 with no audible or power difference. The need for improvement lies elsewhere in this amp, I think.
Not that it is bad like it is, but something still needs improvement sonically when my "afternoon project" EL84 SE (in pentode mode) amp sounds as good or better.

Gary
 
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