|
Open input filter? A bad B+ filter will give either a 60Hz or 120Hz "crawling line" in the picture. Any accompanying buzz in the sound??
It could also be AGC action, see if the AGC control has any effect.
If you have a scope, check out the B+ ripple - but be sure your set is on an isolation transformer and that your scope and probe are capable of measuring ~300V. B+ ripple is dead giveaway to an open filter/smoothing capacitor.
Cheers,
__________________
Brian
USN RET 22YRS (Avionics/Cal)
CET-Consumer Repair and Avionics ('88)
"Capacitor Cosmetologist since '79"
When fuses go to work, they quit!
|