11-02-2017, 08:25 AM
I calculated the power dissipation (PD) in the two 6V6 tubes as 12.5 and 14.2 watts, both are cathode biased through a single 300 ohm resistor and a .47uf cap. I think that is a little "hot" according to my spec sheet. So I am thinking of lowering the PD a little by upping the resistor value. Then I thought maybe I will balance the PD between the two tubes AND lower it a little.....maybe shoot for 10 Watts per tube. So installing a bridging pot and a pot to ground would give me both adjustments. OR maybe a fixed and a variable resistor on each cathode to ground, giving me a range of 250-400 ohms for adjusting cathode bias. Thinking......