As I upgrade the components on a '66 single Showman, a frequency specific noise has now become prominent on "A" notes on the A and B strings of three different guitars (Fender and Gibson) on both channels. I hear it on C notes too, but not as disturbingly. Its a high frequency sheen that is most obvious on the neck pickup at lower volumes, but not much less on the bridge PU or at louder volumes.
I don't really know when I first started noticing it, but about the only thing I haven't replaced yet are the filter caps, which are are at least five years old (100µF/350v and 20µF/500v Spragues). And were never used for those five years. I haven't replaced the pwr tubes yet either.
I did add a filter stage (16µF/475v+20k), for the 5f6a normal channel.
I've changed the PI tube (at7). I've swapped the d130f for a d140f speaker.
Any ideas?
I don't really know when I first started noticing it, but about the only thing I haven't replaced yet are the filter caps, which are are at least five years old (100µF/350v and 20µF/500v Spragues). And were never used for those five years. I haven't replaced the pwr tubes yet either.
I did add a filter stage (16µF/475v+20k), for the 5f6a normal channel.
I've changed the PI tube (at7). I've swapped the d130f for a d140f speaker.
Any ideas?
Comment