How does that give the 6V6 more headroom with both clipping at 15 watts?Amplification factor.
So reduce the gain and then use a pedal to get it back? Why not just use the amp's volume control?If you want a really clean EL84 amp, build half a Mullard 5-10. It's an old hi-fi design that delivers 10 Watts RMS. Use an overdrive to get an overdriven sound and the amp to do the lifting.
The 6p1p-EV can be subbed in with only a few wiring changes and a change of cathode resistor, but take care with the screen resistor choice. I found through trial and smoke that they prefer a higher value.
You have enough juice for a 15W amp. Open up two tabs of this link. Select EL84 for one and 6V6GT for the other. Set both V+ for 315V, Iq at 35 mA and screen at 300V. Power out at 20W and 21W, the values do not take into account the power lost in the OT, knock off a few watts.I wanted to maintain the PT. Is there really enough juice for a Harvard or Princeton? The schematic shows ~315 B+
The EL84 needs -12V bias and the 6V6 -12V. So you can turn the volume control a little lower or you can stick a 12AY7 in the front spot (you may need to turn up the volume though).
Both tubes leave about 25V on the table as they can not get closer than that in saturation. Otherwise the power is the same for the same voltage and output transformer impedance.