Unable to account for frequency related to Magnet being pulsed by Inductor

[duff]

Do you have the same singing magnet as before?

Yes  and the 959Hz signal is still there.

I'm not using a FG. I have back to back regenerative magnetostrictive oscillators working as a multivibrator.

I was referring to your reference to the one polarity pulse to the coil and questioning if the negative portion of my waveform would interfere with getting similar results as yours.


If I can get the osc together tonight I'll try to take the circuit to the country tomorrow...

[BEP]

Yes  and the 959Hz signal is still there.

Ahh! Didn't see the pic on my phone.

I was referring to your reference to the one polarity pulse to the coil and questioning if the negative portion of my waveform would interfere with getting similar results as yours.

I cannot provide a good answer for you on the effect of polarity for your circuit. I will say the magnet coil polarity relationship works only one way with mine. However, the current in my coils is DC with a heavy AC (sine) component.
Polarity does not cross zero. If I reverse the coil drive without flipping the magnets there are almost no interesting results.

There is still a chance your experiment is an interaction with the grid. I'm anxious for you to prove that idea wrong. Too often I've had exciting tests that failed when I went to battery power 

[giantkiller]

Run exclusively with ATV batteries and you win.

--giantkiller.

[allcanadian]

@Duff
I built and tested the exact same setup you have last year and found the exact same phenomena you describe. It took me a while to find my lab notes on this, about 10 pages, LOL. I produced many variations with multiple coils, multiple magnets etc... .I believe some people here are reading way too much into this, the problem is one of perception, you see a stationary magnet on a stationary coil and have concluded there are oscillations coming from somewhere else. I found the secondary oscillations are from loose coil windings,when the coil windings were varnished the oscillations disappear. I am not saying this effect does not show promise I am just saying I found "where" the oscillations were coming from, it is basically standard induction but the motion is on a very small scale which is misleading. Try "tapping" the magnet on the hard plastic of the wire spool with your scope on the leads and you will see what I mean or hit the table the coil is on. It's pretty cool actually, like a massive microphone or speaker coil.
Regards
AC

[allcanadian]

Doh, double post
-- I know of something relative to this effect as well, back when me and dad were kids a friend and fellow nerd decided to build a speaker. I mean an insanely massive speaker measuring 8 foot by 8 foot into his livingroom wall. The electromagnet was 2 feet in diameter, Im not even sure what kind of power he was pushing through this monster. In any case at full power this thing could literally re-arrange your furniture, LOL. He also said if tuned properly you could hear any conversation in the whole house, I image you could hear the neighbors talking. I thought this was way too cool:)
Regards
AC