Posted by Damir [ 213.202.86.220 ] on September 08, 2005 at 00:46:02:
In Reply to: Re: New day, more tinkering, new results posted by hurdy_gurdyman on September 07, 2005 at 15:42:45:
Are you sure that your resistors values are correct, and your measurements, too?
In this last case, (20 Ohms for 4 tubes), you have large drop of Ug2 and Ua, and your Ia+g2=1,1/20=55mA, or 13,75mA per tube- something isn`t quite right. I suppose that you doing it right - disconect all the cathodes (pin 8), solder them together and ground it through 20 Ohms resistor. Pin 1 (g3) of each EL34 is connected to pin 8, right?
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