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|31st August 2012, 10:45 AM||#21|
Join Date: Feb 2010
I run this model with my existing amplifying stage and it seems that the
model is quite different than the 6F12P pentode from 1990, the tube type where the heaters can not be seen.
This is my circuit:
In real circuit the voltages and currents are as follows:
Ua = 92 V
Ia = 4,0 mA
Ug2 = 177 V
Ig2 = 0,47 mA
In actual circuit THD is 0,40 % when the output level is 20 Vrms.
In simulation the screen current is much smaller than in real case.
To get the simulation work as the actual circuit works the screen resistor should be some 750 k when in actual circuit it is 220 k.
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