Hi
Have just obtained a new to me 7l12--it seems to work somehow--if filters-video span etc works--but dc feedthrough 150Mhz off--when tested with 50Mhz cal signal --it is located 150 off and span seems to be okay.
Level seems also to be off.
Any idea welcome.
Regards
Hardy

Hello unclear what you say re dc feed thru

Suggest that you post images of the symptoms and control settings.

Beside the CAL Signal use an external RF generator to test.

Beware of overloading the input!

Best Regards

Jon