Postby PIANOLYDIA » Mon Jun 10, 2013 1:50 pm
I have concluded That I will use LED'S OR Battery Biasing.
I may try both options to see which is going to sound better! Ed, What do you think of this implementation also I changed the 12AV7 Volatage Resistor to 47k As per Geeks Recommendations. That will divide the 47/2 = 23.5K to each Plate So; this is good! Any comments? May need to place 3 LED's in series on both Cathodes yielding 4.8V+ Each SIDE. So my Calculations are as follows: I am going to set the PV each side at 131V i AM GOING TO ASSUME A mU OF ABOUT 30 and that yields me around g(V) set at -3.25V our Bias will be 7.5mA setting up the V/mU = 131/30 = Bias Voltage of 4.36V next I took 4.36V/7.5mA = 1.34K Cathode bias Resistors. each side. But' I am only going to be concerned here with the Bias Voltage and getting that set up as a fixed Bias. So LED's are a fixed Bias I presume? So I will need (3) Red LED's to make sure I will be able to maintain the 7.5mA current to yield that 30mU out to the output tubes Hopefully...... Any comments?
Ed, I need your Calculations here. Thanks so much you guys, Geek, DeathRex, etc....Pianolydia
