Help understanding the PowerDrive circuit anaylsis

Bitrex · 22nd July 2009, 03:44 AM

In the analysis of the blocking distortion that the PowerDrive circuit is designed to remedy, I don't understand why when the coupling capacitor discharges on large positive swings it discharges through the plate only, but when recharging after the transient has passed it recharges through both the plate resistor and the grid resistor. Help!

jerluwoo · 22nd July 2009, 04:15 AM

Your a little off on this. When the grid is pulled positive with respect to the cathode , it will pull current from the coupling cap fairly quickly. Then when the grid is swung negative again it quits pulling current and the cap has to slowly recharge through the plate and grid resistors. The recharge is considerably longer than the discharge.

22nd July 2009, 03:44 AM	#1
Bitrex diyAudio Member Join Date: Jan 2009	Help understanding the PowerDrive circuit anaylsis In the analysis of the blocking distortion that the PowerDrive circuit is designed to remedy, I don't understand why when the coupling capacitor discharges on large positive swings it discharges through the plate only, but when recharging after the transient has passed it recharges through both the plate resistor and the grid resistor. Help!

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22nd July 2009, 04:15 AM	#2
jerluwoo diyAudio Member Join Date: Feb 2006 Location: Ashland,Ky U.S	Your a little off on this. When the grid is pulled positive with respect to the cathode , it will pull current from the coupling cap fairly quickly. Then when the grid is swung negative again it quits pulling current and the cap has to slowly recharge through the plate and grid resistors. The recharge is considerably longer than the discharge.

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