Replies to This Discussion

Permalink Reply by MichaelS Country Boy Guitars on July 22, 2010 at 9:04am

Interesting read, I have no idea how to check the polarity either, would be nice to know, I just made 2 double piezo pickups and they sound good, maybe I got lucky or maybe it doesn't matter with only 2? Anyone know?

Permalink Reply by jim on July 22, 2010 at 4:32pm

That thread is so full of B.S. Piezo transducers produce alternating current. So polarity alternates from lead to lead.

Permalink Reply by Grizz on July 23, 2010 at 3:18am

If piezos were AC current than everything in the circuit would also be AC current. That would mean it doesn't matter how you wired anything, which of course is incorrect. There are positive and negative poles to all of it.

Permalink Reply by jim on July 23, 2010 at 4:35am

"Piezo transducers produce alternating current" Test one, it depends on which way the ceramic is flexed/compressed that sends the positive current . and that current alternates from side to side depending on the flex/compresssion of the ceramic. you all figure it out, im done

Permalink Reply by MichaelS Country Boy Guitars on July 23, 2010 at 1:27pm

OK, if there is no polarity then it shouldn't matter if they are wired parallel or in series?

Permalink Reply by David L. on August 9, 2010 at 9:55am

I have found the following using piezos taped to a strat copy body around the bridge and put through a 10W amp

1. No difference in sound between between 25mm and 35mm discs.
2. Changing position of the disc did give a slightly different sound (stick it on the high e string you get more treble and stick it on the lowE you get less treble - no surprise there)
3. No difference in sound between 1 and 2 or 3 piezos wired in parallel
4. intentionally wiring 2 piezos black/red to hot and red/black to earth didn't affect the sound (no sound cancellation to my ear)
5. 2 piezos wired in series sounded poor compared to a single piezo or 2 in parallel.

(please note this is only my view and others may have diferrent opinions which I would gladly like to hear)