This video walks through 2 issues regarding older tube era radio repair:
1) Recognizing, Diagnosing and Fixing unwanted IF transformer feedback and oscillations
2) Recognizing, Diagnosing and Fixing "motorboating" oscillations.


I talk a little about how leading dressing can cause feedback induced oscillations in the circuit.


I look at some old documentation on diagnosing these issues.


I also look at a strange circuit design for RF, IF front end ground coupling.