Hi, i build a while ago a 15w rf amp with rd15hvf1 rf mosfet which worked flawlessly but this morning i wanted to adjust the coils by compressing the coils with my finger for max power but suddendly the power went from high to nearly nothing in a second. I tested the mosfet with a transistor tester and it shows ok and i even tried to put a rd06hvf1 in my amp and it still dont amplify, with rd15 it normally outputs 15w and current is about 1A but now it outputs 0.3w max and current is 0.5A
The tester shows with rd15 "Vt 3.52v | C 76pF | Rds 1.1 ohm" + 682mV drop from S to D
I checked also the gate voltage and supply voltage which are ok
Any ideas on whats happening ? Maybe the coils are in such way that no power is made ?? I would be disapointed if i need to buy another mosfet because they are very expensive
The tester shows with rd15 "Vt 3.52v | C 76pF | Rds 1.1 ohm" + 682mV drop from S to D
I checked also the gate voltage and supply voltage which are ok
Any ideas on whats happening ? Maybe the coils are in such way that no power is made ?? I would be disapointed if i need to buy another mosfet because they are very expensive