Microphonic Feedback

[jam3v]

I've been having the same problem with this guitar, no matter what pickups I put in it. 

Microphonic feedback when I hold the strings.  It happens when the amp has been turned up to a certain volume.  It's definitely not the amp, as my other guitars don't do this.  This also happens on any amp I use this guitar with.

One curious thing is that this feedback won't happen until I turn the tone knob all the way to treble.

The pickups are mounted well, and don't move.  They're brand new Nailbombs.  I had the same problem with a set of Dimarzios, in both the bridge and neck positions.

The guitar is an RG1527 and has direct mount for pickups.  I'm wondering that maybe the pickups are touching the body?  I've rewired everything a number of times with no luck.  Everything works the way it should with switching, except for the microphonic feedback.

[ericsabbath]

my holy diver is very sensitive to feedback too, specially in bright/middy/loud amp settings

[jam3v]

Does it happen even when you mute the strings?

[ericsabbath]

only if I'm next to the drums or right in front of the speakers

[jam3v]

I found the problem.  I don't think the mounting to the guitar is firm enough.  Even though I can't move the pickup, when I push it against the body really hard the squealing stops.

I have no idea how I can mount this thing more securely to this wood since it's kind of brittle.

[Ratrod]

Try putting some foam material under the pickups, mouse pad for example.

[MDV]

I find it extremely unlikely that the whole pickup moving is causing it to self induct. It would take a very strong magnetic field to move a whole pickup.

I'm guessing its quite a low frequency, midrange at most, type hum, not an ear splitting squeel?

If the former, its what you get with a high output pickup with a high gain amp and enough volume and cant be avoided, if the latter its one or more loose turns in the pickup that are being caused to move by ambient magnetic fields and the rest of the pickup picks it up.

[jerry]

I posted a thread recently about the same problem with the P90 in an old SG Junior . I've solved it by putting a foam rubber pad under the pickup so that it presses firmly on its underside and stops mechanical feed back caused by the components in the pickup rattling around at volume .

[MDV]

I posted a thread recently about the same problem with the P90 in an old SG Junior . I've solved it by putting a foam rubber pad under the pickup so that it presses firmly on its underside and stops mechanical feed back caused by the components in the pickup rattling around at volume .

Interesting. Perhaps I was wrong (above post)