This topic was just started over at OU but I thought I'd start a parallel thread here as well.
Here's my first build with the materials I have

The discussion at OU http://www.overunity.com/14307/acoustic-magnetic-generator/msg388074/#msg388074
and this is the paper which I found interesting
http://rexresearch.com/mra/1mra.htm
and this one
http://www.free-energy-info.co.uk/PatD9.pdf
A very simple circuit using a piezo transducer, a bridge and a couple of rectifiers coils. It requires barium ferrite mags which I don't have. My tone generator in this experiment is my iphone direct to the piezo. No external amp.
I'm generating close to 7v but I have not yet measured current.

Quite interesting.  Enjoyed your video.
 
You know something that jumped out at me when looking at this circuit...   If you were to approach it from a Tesla perspective, use higher voltage on the input and substitute the piezo device with a spark gap, you might also get interesting results.  What I doubt anyone has done is to really tune such a device by octaves and harmonics against the magnet's resonant frequency.

There is definitely something here worth learning about.  Keep us posted on your findings; most especially if you find a way to loop it.

Well I'm lighting a couple of LEDs now from the output of a headphone jack so that's cool. I'll get real excited if I can do incandescents though

Here's the LED lighting. Now to do some measurements and gets me some barium ferrite :)

https://www.youtube.com/watch?v=XJe8OaJo_zw

Quote from Jimboot on February 16th, 2014, 07:42 PM

Here's the LED lighting. Now to do some measurements and gets me some barium ferrite :)

https://www.youtube.com/watch?v=XJe8OaJo_zw

That's pretty darn cool!
 
I don't know if you have the equipment or not, but if you can show a dual scope trace of the input volts/amps using a small shunt for the amps, I may just start to get even more excited.
 
Those are neo magnets too, so they certainly won't drop-out in our lifetime.  Very nice.  I'll do some Internet hunting for barium ferrite cores and see if I can come up with anything.

@Jimboot,

I'm newly registered over here Jimboot, looking forward to more exciting experiments.

Best regards,

Synchro

Quote from Synchro on February 17th, 2014, 01:40 PM

@Jimboot,

I'm newly registered over here Jimboot, looking forward to more exciting experiments.

Best regards,

Synchro

Great to see you here mate.
You'll find discussions tend to be a lot more civil even if people disagree. I'm hoping to get back to things tonight after work.

@Jimboot,

Here's a link to the Gunderson patent. More similar to your setup. From Verpies.


http://www.overunity.com/14307/acoustic-magnetic-generator/dlattach/attach/133603/

Mmmm that's interesting. I'll have a closer look at that . I've been trying other coil setups as well as wrapping the neos but the yoke still works best.

Worked up something quick and dirty but nothing interesting to report on the Gunderson setup. Hooking 2 peizos up in series though to the existing setup takes the standing volts up to 3.5 from 1.2 with only one. Applying the mags got it up to 8volts. My questions 1. Why? 2. When does the law of diminishing return kick in. If I hook up 3 will my standing volts go to 9? Will applying the mags take it to 18 or 19volts? I only have two piezos at hand which is why I ask. This is the transducer I'm using http://www.jaycar.com.au/productView.asp?ID=AB3440
Thanks guys.

Some more info.
I get the same effect if I use an alnico horseshoe.
Greatest gains happen when the mag is over the pick up coil.

Ok I'm guessing that the piezoelectric acting as a cap. Still don't understand why it triple the voltage in series though.

Quote from Jimboot on February 18th, 2014, 03:26 AM

Ok I'm guessing that the piezoelectric acting as a cap. Still don't understand why it triple the voltage in series though.

That is very interesting.  Somehow these things are coupling their effect as they are added to the circuit in series.   Sympathetic Vibrational Physics...?  Is each one acting like a little dipper reaching into the Aether?

Quote from Jimboot on February 18th, 2014, 03:26 AM

Ok I'm guessing that the piezoelectric acting as a cap. Still don't understand why it triple the voltage in series though.

Very exciting results! Nornan Wootan speaks of threes and nines and magnetic harmonics. For example, the addition of a third piezo transducer may yield nine times the voltage!

Well that would be nice. I'll buy some more today and hook them up.

Well this is frustrating. Started work at 3:30 am so I could knock off early and play in the lab (shed) - Results are all over the place. I even went and spent $200 on a sig gen. Anyway this is where it is at.
I cannot replicate my results from last night. Without mags applied I get around 3v with only a single piezo now at 20khz via iphone. I cannot get the voltage to rise by applying the mags.
The ONLY thing I can think of is that I move a pulse motor away to clear some space. It had a 1" axially magnetised neo on it. Big beast. It was probably 18" away from the experiment but I did notice when I was applying the neos to the yoke it moved a little, so there was a big mag field in play there.
The device is pretty fickle if I move it slightly the voltage can change.
I then hooked up the extra piezos and the voltage dropped as I would have expected to last night.
I did a sweep with the new siggen and I got as high as 25v at around 121khz.
So next experiement is to put the bloody pulse motor back where it was to see if the interacting mag fields through the yoke and piezo is what may have been causing the effect.

Reply from Lasersaber to TK's new video:


"Hi TinselKoala,

I just tried the basic effect using an iPhone like JimBoot started with.  My scope showed .5V on the input before the transducer.  On the output side I found a sweet spot giving over 8 volts.  The LED was nice and bright.  I actually did not expect it to work on the iPhone mic output.  I ran out of time this evening but I will check current draw etc in the future.  I believe the transformer to be a 1:1 ratio but without unwinding I am not absolutely sure.  It seems to me that it is a tank circuit effect".

Lasersaber reports 1/2 a volt on the input before the transducer, and over 8 volts on the output side!

I think I'd like to hook it up to a mot. Be interesting to do a sweep

Uploading new vid.  http://youtu.be/j41_wpoMD_o still processing.

finally the video has encoded.

https://www.youtube.com/watch?v=j41_wpoMD_o#ws

That's sure strange how it associates itself with everything around it.  Which is probably a good thing once we can understand what it truly likes and dislikes.

It feels almost like rf

So sorry if this is a dumb question but should LEDs light off an AC signal?
I disconnected from the bridge and connected them directly to the pickup coil. Voila! Light. I don't understand what is happening here but I thought you guys might.

Ok did some research so AC will light it up and it is flashing at a high frequency. Interesting the left over DC voltage though. I'm going to dust off my USB scope and get it on this thing.

I'm thinking of saying I put a potato in series with the piezo and it had miraculous effects just to see it turn up in one of his vids :)

Quote from Synchro on February 18th, 2014, 09:15 PM

Reply from Lasersaber to TK's new video:


"Hi TinselKoala,

I just tried the basic effect using an iPhone like JimBoot started with.  My scope showed .5V on the input before the transducer.  On the output side I found a sweet spot giving over 8 volts.  The LED was nice and bright.  I actually did not expect it to work on the iPhone mic output.  I ran out of time this evening but I will check current draw etc in the future.  I believe the transformer to be a 1:1 ratio but without unwinding I am not absolutely sure.  It seems to me that it is a tank circuit effect".

Lasersaber reports 1/2 a volt on the input before the transducer, and over 8 volts on the output side!