Building a 5E3 type circuit with 4x6V6 for the output.Would it make a difference if I used one cathode resistor on all four tubes or one on each pair.The reason I ask is I have a 25watt 500 ohm rheostat I was thinking of using so I would have an adjustible bias.I would think it wouldnt make a difference but I'd like to hear some opinions/experiences you guys might have.Thanks.