05-01-2018, 05:21 PM
Got this Stewart Warner Ferodyne R-137-A from a friend and just had to clean it up and re-cap it.
Seems to work pretty good after the re-cap.
Only issue I have noticed is a static noise when first fired up as if the switches are dirty.
But it does it even when you are not playing with any of the switches.
After about 10 minutes of warm up, it goes away.
Suspected a bad tube that improves with warm up. swapped out the tubes with no change.
Cleaned the tube pins and still no change.
Looked for any cold solder joints or suspect resistors with no luck.
Any ideas from the pro's?
murf
Seems to work pretty good after the re-cap.
Only issue I have noticed is a static noise when first fired up as if the switches are dirty.
But it does it even when you are not playing with any of the switches.
After about 10 minutes of warm up, it goes away.
Suspected a bad tube that improves with warm up. swapped out the tubes with no change.
Cleaned the tube pins and still no change.
Looked for any cold solder joints or suspect resistors with no luck.
Any ideas from the pro's?
murf
