Less output power

Soundararajan Ra.
 

Recent i got smd version of BITEX40 and came on the air.
After few conversation my output level was dropped.My antenna was well matched and it is minimum 1:1.1 to 1.2 for entire 40 meter band.
I checked for loose connection
I have replaced mic
Two times IRF510 replaced
when mic removed condition,  current was set for 100 ma
i am getting only  around 2 watt,in my diamond sx200 swr meter , with 12volt dc feed,output was connected to 50 ohm dummy load.,
please let me know what are the further points to be checked   with CRT oscilloscope to raise the power level.
Soundar
VU2RJW


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