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Permalink Reply by JL on October 24, 2014 at 12:16am

I'm curious if the problem PUP still acts like a mic without strings over it? If so that suggests the lid/coil attachment is not solid and rigid and the coil picks up the lid vibrating more/less than the coil.  I have a few ideas on fixing it if that proves out...

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Permalink Reply by Eric Kasten on October 24, 2014 at 1:29am

Yes, it is still very sensitive... microphonic... 

Attaching photo below....

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Permalink Reply by The Phrygian Kid on October 24, 2014 at 12:26am

It will, it basically is a primitive microphone with an enormous diaphragm. But does the coil pick up the lid vibrating, or does the cool pick up itself vibrating within (against) the tin ??

It might make a cool stomper if rebated into some reject box/plank, that's my best suggestion for it.

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Permalink Reply by Eric Kasten on October 24, 2014 at 1:31am

Photo of the underside of said PU.  Lots'o hot glue under it and some foam...  still sensitive as heck.  I think Bug hit the problem on the head.   I'm open to hearing other theories tho...

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Permalink Reply by BUGGY (C) on October 24, 2014 at 1:33am

Add a tone capacitor and tone pot
The. You can warm it up a bit

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Permalink Reply by BUGGY (C) on October 24, 2014 at 1:58am

Essentially you have built a diaphragm microphone if your poles don't protrude, as above pic shows 

especially if the coil is loose or can vibrate with the lid..

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Permalink Reply by BUGGY (C) on October 24, 2014 at 2:00am

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Permalink Reply by BUGGY (C) on October 24, 2014 at 2:03am

However if that coil was fitted to the bottom of your dog bowl and the magnet fitted to the base so it can vibrate up and down as the bowl vibrates, that would be kinda cool.

See my bugomatic pickup design which use a floating magnet on a spring so you can shove them anywhere on the sound board and they work..

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Permalink Reply by BUGGY (C) on October 24, 2014 at 2:09am

http://www.cigarboxnation.com/photo/aluminium-pickup-tester-guts-ho...

Again they pickup like a piezo would which is exactly what you get, for the same reason.

See Bugs "Sloth" song for how they sound... they also work as a magnetic as well

so you get a special tone from them unlike anything else...but not such a good tone lol

http://407bug.bandcamp.com/track/sloth

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Permalink Reply by Eric Kasten on October 24, 2014 at 3:17am

I aint crazy about piezos.... or their sensitivity to vibrations/handing noise.  I also really like making PUs.  I take satisfaction in making them...

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Permalink Reply by Eric Kasten on October 24, 2014 at 3:14am

On my PU there is a flat piece of circuit board between the magnet/coils and the lid. Then that circuit board is epoxied to the lid.  I find it difficult to believe that there's any movement between the magnet and the lid.  However, there could be lid vibrations to the sides where I hot glued... but I am surprised the hot glue wouldn't stop that.

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Permalink Reply by Eric Kasten on October 24, 2014 at 3:15am

Here's a cut out view on how I constructed this PU.  I agree I need to extend some poles on the next one... above the lid. 

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