02-02-2020, 07:14 PM
Set was designed for metal tubes with exception to the rectifier and the Last Audio...
Then I would look at one of the mica caps in the front end.
This set is too old for "SMD" as it has compression trimmers in the IF's
First, isolate the noise at the volume control, be sure it is coming from the "front" end... Try the wooden probe method on the caps resistors socket and coils. If no joy, try cooling spray on the resistors. Then probe the front end stages.. When it comes to noise every trick in the book. It can be caps, resistors, coils, tubes, ya, anything, so stage by stage may be required.
Do put in the metal tubes, the shield is integral with them...
Chas
Then I would look at one of the mica caps in the front end.
This set is too old for "SMD" as it has compression trimmers in the IF's
First, isolate the noise at the volume control, be sure it is coming from the "front" end... Try the wooden probe method on the caps resistors socket and coils. If no joy, try cooling spray on the resistors. Then probe the front end stages.. When it comes to noise every trick in the book. It can be caps, resistors, coils, tubes, ya, anything, so stage by stage may be required.
Do put in the metal tubes, the shield is integral with them...
Chas
Pliny the younger
“nihil novum nihil varium nihil quod non semel spectasse sufficiat”
