Hello All,
I am currently working on my first repair of an RF signal generator. I bough the machine and it seems to have everything wrong with it. The LCD is dead the PLL was unlocked and the output if non existent. I managed to fix the PLL and the LCD can be ignored thanks to a nice RS232 interface on the back of the machine.
I am now repairing the output stage. I have traced the signal up to the output Amplifier before the Attenuator. When probed this amplifier is clearly dead. However I cannot for the life of me figure out the part number. I was wondering if anyone had any ideas, or ideas for possible replacements if this part doesn't exist.