I need a sub for the 2SK1300 which is too hard to find at a decent price. I think I can use a FQP13N10L but figured I'd double check if any concerns. Both datasheets attached.
This is an odd circuit, for the power amp, think of a Twin with transistors.
Output transformer, single positive supply rail feeding OT. Two pairs of 2SC type bi-polar power transistors getting around 35VDC via the OT. Output transistors driven by these 2SK1300 Fet's, one for push, one for pull side. The push vs pull are too imbalanced, I think one was damaged when one side of the outputs blew.
Now with the original Fet's, I get 'push' output xistors idling around 40mA each, and 'pull' xistors running around 180mA each. So too far unmatched as far as I can tell, plus I think it's fair to assume the driver was damaged or stressed when the outputs blew.
The 13N10L I think looks like a good match, but does not have the Vgs clamping internal zeners. Do I need to add them for this application, and if so, what voltage?
This is an odd circuit, for the power amp, think of a Twin with transistors.
Output transformer, single positive supply rail feeding OT. Two pairs of 2SC type bi-polar power transistors getting around 35VDC via the OT. Output transistors driven by these 2SK1300 Fet's, one for push, one for pull side. The push vs pull are too imbalanced, I think one was damaged when one side of the outputs blew.
Now with the original Fet's, I get 'push' output xistors idling around 40mA each, and 'pull' xistors running around 180mA each. So too far unmatched as far as I can tell, plus I think it's fair to assume the driver was damaged or stressed when the outputs blew.
The 13N10L I think looks like a good match, but does not have the Vgs clamping internal zeners. Do I need to add them for this application, and if so, what voltage?
Comment